What is UV absorber?

Taian Green Industry Co., Ltd is located in Tai'an City, Shandong Province, China. It has production bases in Shandong Province, Hubei Province, Zhejiang Province and Jiangsu Province. It mainly produces photoinitiators, light stabilizers, UV absorbers and other chemical additives. The annual production capacity reaches thousands of tons. Taian Green Industry Co., Ltd is China's top manufacturer and supplier of photoinitiators, light stabilizers, UV absorbers and other chemical additives. Welcome to consult and purchase.

Due to the damage to the ozone layer caused by environmental pollution in recent years, ultraviolet rays have passed through the atmosphere more easily, which has a greater impact on people's production and life, especially the skin. Today, we discuss how to reduce the impact of UV on us.

First, let's understand what UV rays are and what type of UV rays they are.

Ultraviolet light refers to electromagnetic waves with a wavelength of 10 to 400 nm. The wavelength is shorter than visible light, but longer than X-rays.

Divided according to the wavelength range, ultraviolet rays can be divided into the types shown in the figure below:

Name

Abbreviation

Wavelength(nm)

Wavelength(nm)

Ultraviolet A

UVA

400 nm~315 nm

3.10~3.94 eV

Near ultraviolet

NUV

400 nm~300 nm

3.10~4.13 eV

Ultraviolet B

UVB

315 nm~280 nm

3.94~4.43 eV

Middle ultraviolet

MUV

300 nm~200 nm

4.13~6.20 eV

Ultraviolet C

UVC

280 nm~200 nm

4.43~12.4 eV

Far ultraviolet

FUV

200 nm~122 nm

6.20~10.2 eV

Vacuum ultraviolet

VUV

200 nm~100 nm

6.20~12.4 eV

Light ultraviolet

LUV

100 nm~88 nm

12.4~14.1 eV

Super ultraviolet

SUV

150 nm~10 nm

8.28~124 eV

Extreme ultraviolet

EUV

121 nm~10 nm

10.3~124 eV

Although UV is divided into so many! But our main concern is UVA (315nm-400nm), UVB (280 ~ 315nm) and UVC (200 ~ 280nm).

UVA is the longest type of ultraviolet light, with a wavelength range of 315 ~ 400nm. It has strong transmission power and is not absorbed by the ozone layer. It can penetrate clouds, glass into indoors and cars, and can penetrate to the skin dermis.

UVA penetrates clothing and human skin far more strongly than UVB, reaching deep into the dermis, and acting on melanin in the epidermis, causing skin melanin to settle, darkening the skin, and protecting the skin from UV rays. effect. Therefore UVA is also called "tanning section".

Although UVA does not cause acute skin inflammation, it has a slow and long-lasting effect on the skin and can accumulate for a long time. It is one of the causes of skin aging and serious damage. UVA will premature skin aging, muscle relaxation, wrinkles and stains, increase UVB damage to the skin, and cause skin tanning. UVA can be further subdivided into UVA-2 (315 ~ 340nm) and UVA-1 (340 ~ 400nm).

UVA-1 has the strongest penetrating power. It can reach the skin's dermal layer to make the skin tan, which is the most harmful to the skin, but it is also the easiest to ignore. Especially in the non-summer period, the intensity of UVA-1 is weak, but It still exists, which will cause skin damage due to long-term accumulation. In particular, the skin relaxes, loses elasticity, and melanin deposits, which causes the skin to age prematurely.

UVA-2 can reach the skin epidermis like UVB, it can cause skin sunburn, redness and pain, solar keratosis (senile plaque), and loss of transparency.

The wavelength of UVB is centered, and it is ultraviolet rays with a wavelength range of 280 ~ 315nm. It is largely absorbed by the skin epidermis and cannot penetrate into the skin. However, due to its high order energy, it can cause strong light damage to the skin, dermal blood vessels in the irradiated area dilate, and the skin may appear redness, swelling, and blisters. Long-term exposure to the skin will cause erythema, inflammation, and skin aging. In severe cases, it can cause skin cancer. It is the main band to prevent ultraviolet sunburn and is the root cause of skin sunburn. Therefore, UVB is also called the "sun-red section", which is the ultraviolet band that should be focused on prevention.

UVC is ultraviolet light with a wavelength ranging from 100 to 280 nm. Because UVC has a sterilization effect, it is called a "sterilization section". Since the wavelength below 200nm is vacuum ultraviolet and can be absorbed by the air, the wavelength at which UVC can penetrate the atmosphere is 200 ~ 280nm. The shorter and more dangerous the wavelength is, but because it can be blocked by the ozone layer, only a small amount will reach the earth's surface . Therefore, the transmission force of UVC only reaches the cuticle of the skin, and hardly causes harm to human skin.

It can be seen that the prevention of skin damage caused by ultraviolet radiation to the human body is mainly to prevent UVB radiation; the prevention of UVA is to avoid skin tanning. In Europe and the United States, it is considered that dark skin is a symbol of bodybuilding, so tanning agents should be added to cosmetics without considering UVA protection. This view has changed. As people realized that UVA can cause serious long-term damage to the human body, people began to strengthen their protection against UVA.

As we all know, ultraviolet rays come mainly from the sun. The ultraviolet rays emitted by the sun include UVA, UVB, and UVC. Earth's ozone layer blocks 97-99% of ultraviolet light. But environmental pollution destroys the ozone layer in the atmosphere and destroys this natural barrier to protect human health. According to a report provided by the China National Meteorological Center, the total ozone layer in China's atmosphere has been decreasing year by year since 1979, and the ozone layer has decreased by 14% in 20 years. For every 1% decrease in the ozone layer, the incidence of skin cancer increases by 3%.

In addition to the damage caused to human skin by ultraviolet rays, it will also affect cars, amusement facilities, and public facilities that have been exposed to the sun for a long time, which will accelerate the yellowing speed, make the photoaging phenomenon more obvious, and reduce the service life of products.

Finally, let's understand what a UV absorber is and how it protects against UV rays.

According to the mechanism of preventing ultraviolet rays, it can be divided into ultraviolet scattering agents and ultraviolet absorbers.

一、Ultraviolet shielding agent

Ultraviolet shielding agent is what we usually call physical sunscreen, and it can also be called inorganic sunscreen. Ultraviolet shielding agents use certain inorganic substances, such as titanium dioxide, zinc oxide, titanium oxide, and new organic powders, to reduce or reflect the ultraviolet rays to reduce skin damage. These tiny particles can form a barrier layer on the skin surface and protect the skin by reflecting and scattering ultraviolet rays. The advantages are chemical inertness, high light stability, good safety, no direct irritation to the skin, and no restrictions on dosage. The disadvantage is poor transparency. In the past, the traditional titanium dioxide used for sunscreen had large particles and easily formed whitening phenomenon on the skin. It was thick and had poor texture and skin feel. It was like a white mask on the face after use. Improper use could easily block pores and affect Sweat glands are secreted and even cause skin diseases. Therefore, physical sunscreen is suitable for sensitive skin, but not for oily and large pores. In 1997, the US FDA listed titanium dioxide as a Class I (ie, safe and effective) sunscreen approved for use, with a maximum formulation amount of 25%. Subsequently, zinc oxide was also listed as a class I sunscreen. Now that the process is improved, the crystal sizes of titanium oxide and zinc oxide have been refined. From ultra-fine particles to nano-sized Tioz and ZnO ~ D, the smaller the crystal size, the more visible light can pass through while blocking ultraviolet rays, thereby reducing Albino phenomenon. Ultrafine particles of ultraviolet shielding agents can not only reflect and scatter, but also partially absorb ultraviolet rays, which can no longer be regarded as pure "physical sun protection". And because some small particles may be absorbed by the skin, and these nanoparticles are easily exposed to sunlight Strongly oxidized and harmful to the skin. Therefore, it cannot be said that physical sunscreen is safer than chemical sunscreen.

二、Ultraviolet absorber

Ultraviolet absorbers are what we usually call chemical sunscreens. They can also be called organic sunscreens. Chemical absorbents usually contain a benzene ring, or an electron-donating group (such as amino or methoxy). Its sun protection mechanism uses the benzene ring or electronic group outside the skin surface to absorb ultraviolet light, which interferes with energy and consumes it, and destroys its lethality. According to its structure, it can be divided into p-aminobenzoic acid, camphor, cinnamate, salicylate, benzophenone, benzotriazole, triazine, and dibenzoylmethane. The most widely used in industry are benzophenones and benzotriazoles. The advantages of UV absorbers are obvious, the texture is refreshing, and the skin-friendly property is good, so the chance of causing skin irritation is greater. The sun protection range is small, and a combination of sun protection agents with different structures is required to achieve a broad-spectrum sun protection effect. In addition, the photodegradation rate is high, that is, the energy is degraded under sunlight, and the sun protection power is lost after a few hours.

The UV absorber should have the following conditions:

① It can strongly absorb ultraviolet rays (especially wavelengths of 280-400nm);

② It has good thermal stability, will not change due to heat even during processing, and has low thermal volatility;

③ It has good chemical stability, does not cause adverse reactions with the material components in the product;

④ It has good miscibility, can be evenly dispersed in the material, no frost and no seepage;

⑤ The UV absorber itself has good photochemical stability, does not decompose and does not change color;

⑥ It is colorless, non-toxic and odorless;

⑦ It is resistant to dipping;

⑧ It is cheap and easy to get;

⑨ It is insoluble or hardly soluble in water.

1.P-aminobenzoic acid and its derivatives

Since the 1950s, p-aminobenzoic acid and its derivatives have been used as sunscreens. It has amino and carboxyl acting groups, has a position effect (para-structure), and the molecule tends to oxidize and discolor. As a UVB absorbent, it is irritating to the skin. Later improvements were made to its homologues, para-dimethylaminobenzoates, which improved its stability and effectiveness.

Name

Cas No.

Synonyms

4-aminobenzoic acid

150-13-0

PABA;

Vitamin BX;

Vitamin B10;

Bacterial Vitamin H1;

p-aminobenzoic acid;

para-aminobenzoic acid

Padimate-O

21245-02-3

ED-PABA;

OD-PABA;

Octyl dimethyl PABA;

Ethylhexyl dimethyl PABA;

2-ethylhexyl dimethyl PABA;

2-ethylhexyl 4-(dimethylamino)benzoate

PEG-25 PABA

116242-27-4/

113010-52-9

Uvinul P 25;

Ethoxylated ethyl-4-aminobenzoate;

Polyoxyethylene ethyl-4-aminobenzoate;

4-Bis (polyethoxy)-p-aminobenzoic acid polyethoxyethyl ester

Menthyl anthranilate

134-09-8

Meradimate;

Methyl p-aminobenzoate;

Menthyl-O-aminobenzoate

Anthranilic acid menthyl ester;

Anthranilic acid p-menth-3-yl ester;

5-Methyl-2-(1-methylethyl)-cyclohexanol 2-aminobenzoate

Glyceryl PABA

136-44-7

Lisadimate;

Glyceryl p-aminobenzoate;

Glyceryl para-aminobenzoate;

Glycerol 1-(4-aminobenzoate);

Glyceryl 1-(p-aminobenzoate)

Spectraban

21245-01-2

N,N dimethyl PABA amyl ester;

Isoamyl 4-(Dimethylamino)benzoate;

3-methylbutyl 4-(dimethylamino)benzoate

Ethyl 4-(bis(hydroxypropyl)amino)benzoate

113284-00-7

CTK4A8191;

ACMC-20d76x;

SCHEMBL58345;

DTXSID90150346;

Benzoic acid,4-[bis(hydroxypropyl)amino]-, ethyl ester;

4-[Bis(3-hydroxypropyl)amino]benzoic acid ethyl ester

Butamben

94-25-7

Butoforme;

Butilaminobenzoato;

Butyl 4-aminobenzoate;

Butyl p-aminobenzoate;

p-aminobenzoic acid butyl ester

Pentyl dimethyl PABA

14779-78-3

Padimate A;

Amyl dimethyl PABA;

Amyl 4-dimethylaminobenzoate;

Amyl p-dimethylaminobenzoate;

Pentyl p-dimethylaminobenzoate;

Pentyl 4-(dimethylamino)benzoate

Benzocaine

94-09-7

Anbesol;

Cepacol;

Lanacane;

Parathesin;

Anesthesin;

Ethyl PABA;

Ethyl 4-aminobenzoate;

Ethyl p-aminobenzoate;

4-Aminobenzoic acid ethyl ester

Resorcinol monobenzoate

136-36-7

3-Benzoyloxyphenol;

Eastman Inhibitor RMB;

Ultraviolet absorber RMB;

Ultraviolet absorbent RMB;

3-Hydroxyphenyl benzoate;

1,3-Benzenediol, 1-benzoate;

1,3-Benzenediol, monobenzoate;

Benzoic acid (3-Hydroxyphenyl) Ester;

Benzoic acid (m-Hydroxyphenyl) Ester

2.Benzophenones

Benzophenone sunscreens have a strong absorption effect on almost the entire ultraviolet region and are a class of broad-spectrum ultraviolet absorbers. This type of sunscreen has high heat and light stability, does not cause photosensitivity reactions, has low toxicity, but is easily oxidized. Therefore, antioxidants are generally added during use.

Name

Cas No.

Synonyms

Benzophenone-1

131-56-6/

606-12-2

Uvinul 400;

Benzoresorcinol;

Ultraviolet absorbent BP-1;

Ultraviolet absorbent UV-0;

2,4-Dihydroxy benzophenone;

Ultraviolet absorbent UV-214

Benzophenone-2

131-55-5

Uvinul D50;

Ultraviolet absorbent BP-2;

2,2 ', 4,4'-Tetrahydroxybenzophenone

Benzophenone-3

131-57-7

Uvinul 9;

Uvinul M40;

Oxybenzone;

Ultraviolet absorbent BP-3;

Ultraviolet absorbent UV-9;

2-hydroxy-4-methoxy benzophenone

Benzophenone-4

4065-45-6

Uvinul MS 40;

Sulisobenzone;

Cyasorb UV 284;

Spectra-Sorb UV 284;

Ultraviolet absorbent 284;

Ultraviolet absorbent BP-4;

2-hydroxy-4-methoxy-5-sulfate benzophenone

Benzophenone-5

6628-37-1

Sulibenzone;

Cyasorb UV 284;

Uvinul MS 40 sodium salt;

Ultraviolet absorbent BP-5;

2-hydroxy-4-methoxybenzophenone-5-sodium sulfonate

Benzophenone-6

131-54-4

Uvinul D 49;

Cyasorb UV 12;

Ultraviolet absorbent BP-6;

Bis(2-hydroxy-4-methoxyphenyl)methanone;

2,2'-Dihydroxy-4,4'-dimethoxybenzophenone

Benzophenone-7

85-19-8

Ultraviolet absorbent BP-7;

2-Hydroxy-5-chlorobenzophenone

Benzophenone-8

131-53-3

Dioxybenzone;

Ultraviolet absorbent BP-8;

Ultraviolet absorbent UV-24;

2,2'-Dihydroxy-4-methoxybenzophenone

Benzophenone-9

76656-36-5

Uvinul 3048;

Uvinuc ds 49;

Ultraviolet absorbent BP-9

Benzophenone-10

1641-17-4

Mexenone;

2-Hydroxy-4-methoxy-4'-methylbenzophenone;

(2-hydroxy-4-methoxyphenyl)(p-tolyl)methanone;

(2-Hydroxy-4-methoxyphenyl)(4-methylphenyl)methanone

Benzophenone-11

1341-54-4

Ultraviolet absorbent BP-11;

2,2'4,4'-Tetrahydroxybenzophenone and 2,2'-dihydroxy-4,4'-dimethoxybenzophenone;

Bis(2,4-dihydroxyphenyl)methanone and bis(2-hydroxy-4-methoxyphenyl)methanone

Benzophenone-12

1843-05-6

Uvinul 408;

Octabenzone;

Sumisorb 130;

Chimassorb 81;

Cyasorb UV 531;

Spectra-Sorb UV 531;

Ultraviolet absorbent BP-12;

Ultraviolet absorbent UV-531

3.Salicylates and their derivatives

Salicylates were the first sunscreens widely used in commercial formulations. For many years, salicylate UV absorbers have been produced in large quantities. Its widespread use benefits from its relatively mild and stable characteristics, and it has better safety than other UV absorbers. The disadvantage, of course, is its relatively low absorption of ultraviolet light. It can be used in combination with other UV absorbers, and it is easier to add to cosmetic formulas. The product has good appearance, stability, lubricity, and water insolubility. It is a class of sunscreen agents often used in China. In addition, salicylates are also solubilizers for some insoluble cosmetic components. For example, octyl salicylate is commonly used to solubilize benzophenone-3. Water-soluble salicylate has good affinity with the skin, can enhance the SPF of sunscreen products, and can be used in hair products.

Name

Cas No.

Synonyms

Trolamine salicylate

2174-16-5

Myoflex;

Sunarome W;

TEA salicylate;

Neo Heliopan TS;

Salicylic acid trolamine;

Triethanolamine salicylate;

Triethanolaminium salicylate;

Salicylic acid triethanolamine;

Salicylic acid triethanolamine salt

Octisalate

118-60-5

OS;

EHS;

Sunarome O;

Octyl salicylate;

Sunarome WMO;

Ethylhexyl salicylate;

2-ethylhexyl salicylate;

Salicylic acid, 2-ethylhexyl ester;

2-Ethylhexyl 2-hydroxybenzoate;

Benzoic acid, 2-hydroxy-, 2-ethylhexyl ester

Homosalate

118-56-9

Heliopan;

Heliophan;

Coppertone;

Sunsafe-HMS;

Ultraviolet absorbent HMS;

Homomethyl salicylate;

Homomenthyl salicylate;

Trimethylcyclohenyl salicylate;

3,3,5-Trimethylcyclohexyl salicylate;

Benzoic acid, 2-hydroxy-, 3,3,5-trimethylcyclohexyl ester

Isopropylbenzyl salicylate

94134-93-7

Megasol;

4-Isopropylbenzyl salicylate;

(4-(1-Methylethyl)phenyl)methyl salicylate;

(4-Isopropylphenyl)Methyl 2-Hydroxybenzoate;

2-Hydroxybenzoic Acid (4-Isopropylbenzyl) Ester;

2-Hydroxybenzoic Acid (4-Isopropylphenyl)Methyl Ester

2-Hydroxyethyl salicylate

87-28-5

Sarocol;

Spirosal;

Espirosal;

Rheumacyl;

Glycol salicylate;

Glycol monosalicylate;

2-Hydroxyethyl salicylate;

Ethylene glycol salicylate;

Ethylene glycol monosalicylate;

Salicylic acid ethylene glycol ester;

2-Hydroxyethyl 2-hydroxybenzoate;

Salicylic acid, 2-hydroxyethyl ester;

2-Hydroxybenzoic acid, 2-hydroxyethyl ester;

Benzoic acid, 2-hydroxy-, 2-hydroxyethyl ester

Phenyl salicylate

118-55-8

Salol;

Salphenyl;

FEMA No. 3960;

Disperse Dye Blue EXSF;

Phenyl 2-hydroxybenzoate;

2-Phenoxycarbonylphenol;

Salicylic acid phenyl ester;

2-Hydroxybenzoic acid phenyl ester;

Benzoic acid, 2-hydroxy-, phenyl ester

Oxydipropylene salicylate

7491-14-7/

59599-53-0/

59587-09-6/

55940-73-3

PPG-2 salicylate;

PPG-2 disalicylate;

Oxydipropylene disalicylate;

Dipropylene glycol salicylate;

Dipropylene glycol disalicylate;

Dipropylene glycol monosalicylate

Isodecyl salicylate

85252-25-1

8-Methylnonyl salicylate;

Salicylic acid 8-methylnonyl ester;

Benzoic acid, 2-hydroxy-, isodecyl ester

Butyloctyl salicylate

190085-41-7

Hallbrite BHB;

2-Butyloctyl 2-Hydroxybenzoate;

2-hydroxybenzoic acid 2-butyloctyl ester;

Benzoic acid, 2-hydroxy-, 2-butyloctyl ester

Tridecyl salicylate

19666-16-1

Salicylic acid tridecyl ester;

Tridecyl 2-hydroxybenzoate;

2-Hydroxybenzoic Acid Tridecyl Ester;

Benzoic acid, 2-hydroxy-, tridecyl ester

Capryloyl salicylic acid

78418-01-6/

70424-62-3

5-Octanoylsalicylic acid;

Salicylic acid, octanoate;

2-Octanoyloxybenzoic acid;

Benzoic acid, 2-((1-oxooctyl)oxy)-;

2-Hydroxy-5-octanoylbenzoic acid;

2-hydroxy-5-(1-oxooctyl)benzoic acid;

Benzoic acid, 2-hydroxy-5-(1-oxooctyl)-

Betaine salycilate

17671-53-3

(Carboxymethyl)trimethylammonium salicylate;

Methanaminium, 1-carboxy-N,N,N-trimethyl-, 2-hydroxybenzoate (1:1);

Benzoic acid, 2-hydroxy-, ion(1-), 1-carboxy-N,N,N-trimethylmethanaminium;

Methanaminium, 1-carboxy-N,N,N-trimethyl-, salt with 2-hydroxybenzoic acid (1:1)

Potassium methoxysalicylate

152312-71-5

4MSK;

MSAK;

4-MSAK;

4-Methoxy salicylic acid KCI;

2-hydroxy-4-methoxybenzoate;

Potassium methoxycinnamate;

Potassium 4-methoxysalicylate;

4-Methoxy salicylic acid potassium salt;

P-Methoxy salicylic acid potassium salt;

Potassium 2-hydroxy-4-methoxybenzoate;

Benzoic acid, 2-hydroxy-4-methoxy-, monopotassium salt;

Benzoic acid, 2-hydroxy-4-methoxy-, potassium salt (1:1)

4.Cinnamate and its derivatives

Cinnamate is the most widely used and most widely used UV absorber in China. The unique structure of cinnamate makes it better absorb ultraviolet rays and has higher absorption efficiency.

Name

Cas No.

Synonyms

Ferulic acid

1135-24-6

Coniferic acid;

Trans-Ferulic Acid;

4-hydroxy-3-methoxycinnamic acid;

3-methoxy-4-hydroxycinnamic acid;

Trans-4-Hydroxy-3-methoxycinnamic acid;

3-(4-Hydroxy-3-methoxyphenyl)acrylic acid;

(2E)-3-(4-hydroxy-3-methoxyphenyl)acrylic acid;

3-(4-Hydroxy-3-methoxyphenyl)-2-propenoic acid;

(2E)-3-(4-hydroxy-3-methoxyphenyl)prop-2-enoic acid

Octinoxate

5466-77-3/

83834-59-7

OMC;

EHMC;

Parsol MCX;

Escalol 557;

Eusolex 2292;

Uvinul MC80;

Octyl methoxycinnamate;

Octyl 4-methoxycinnamate;

Octyl p-methoxycinnamate;

Ultraviolet absorbent MC 80;

Isooctyl p-methoxycinnamate;

Ethylhexyl methoxycinnamate;

2-Ethylhexyl 4-methoxycinnamate;

2-Ethylhexyl p-methoxycinnamate;

4-methoxycinnamic acid octyl ester;

4-methoxycinnamic acid 2-ethylhexyl ester;

(5-Methylheptyl) 3-(4-methoxyphenyl)-2-propenoate

Isopropyl p-methoxycinnamate

5466-76-2

Isopropyl methoxycinnamate;

Isopropyl 4-Methoxycinnamate;

4-methoxycinnamic acid isopropyl

Amiloxate

71617-10-2

IAMC;

Isoamyl p-methoxycinnamate;

Isoamyl 4-methoxycinnamate;

Isopentyl 4-methoxycinnamate;

Isopentyl p-methoxycinnamate;

4-methoxycinnamic acid isoamyl ester;

Isopentyl 3-(4-methoxyphenyl)acrylate

Octocrylene

6197-30-4

OCR;

Parsol 340;

Octocrilene;

Uvinul N 539;

Ultraviolet absorbent 3039;

2-ethylhexyl 2-cyano-3,3-diphenylacrylate

Cinoxate

104-28-9

2-Ethoxyethyl p-methoxycinnamate

Isopentyl trimethoxycinnamate trisiloxane

170637-72-6

Sunshelter SP

5.Camphor derivatives

Camphor derivatives are a class of UVB absorbers with high light stability. They are commonly used in sunscreen black products. They do not stimulate skin, have no photosensitivity, have low toxicity, and have good stability and chemical inertness. However, the skin has a weak absorption capacity, and it is usually added in a compound form. Camphor derivatives can to some extent stabilize isooctyl methoxycinnamate and benzophenone-3. It is currently approved in the European Union and China, but has not been approved by the US FDA. The camphor derivatives can effectively absorb ultraviolet rays of 290 ~ 300nm, the molar extinction coefficient is relatively high, generally above 20,000, and the light stability is good.

Name

Cas No.

Synonyms

3-Benzylidene camphor

15087-24-8

3-BC;

3-Benzylidene-2-bornanone;

3-(4-Methylbenzylidene)camphor

4-MBC

36861-47-9/

38102-62-4

Parsol;

Parsol 5000;

Enzacamene;

Eusolex 6300;

Brillian-BL200;

Uvinul MBC 95;

Neo Heliopan MBC;

4-Methylbenzylidene Camphor;

p-Methylbenzylidene Camphor;

3-(4-Methylbenzylidene)-camphor;

3-(p-Methylbenzylidene)-camphor;

3-(4-Methylbenzylidene)-dl-camphor;

3-(p-Methylbenzylidene)-dl-camphor;

(3-(4-Methylbenzylidene)bornan-2-one;

(3-(p-Methylbenzylidene)bornan-2-one

Mexoryl SX

92761-26-7

TDSA;

Ecamsule;

Terephthalylidene Dicamphor Sulfonic Acid

Polyacrylamidomethyl benzylidene camphor

113783-61-2/

147897-12-9

 

Benzylidene camphor sulfonic acid

56039-58-8

 

Camphor benzalkonium methosulfate

52793-97-2

Methanesulfonate;

4-((2-Oxo-3-bornylidene)methyl)-phenyl trimethylammonium methylsulfate

6.Benzimidazoles and their derivatives

Benzimidazole UV absorbers are a class of UV absorbers that have developed rapidly in recent years. These compounds have good water solubility, higher UV absorption efficiency, and lower photodegradability, which can greatly reduce the effect on the skin. The benzimidazole ultraviolet absorber can effectively absorb ultraviolet rays of 300 ~ 385nm. It can be said that the absorption spectrum of such compounds is close to the requirements of an ideal absorbent.

Name

Cas No.

Synonyms

Bisoctrizole

103597-45-1

MBBT;

Tinosorb M;

Eversorb M;

Tinuvin 360;

Milestab 360;

Ultraviolet Absorbent UV-360;

Methylene bis-benzotriazolyl tetramethylbutylphenol

Ensulizole

27503-81-7

PBSA;

Parsol HS;

Ultraviolet absorbent UV-T;

Phenyl benzimidazole sulfonic acid;

2-phenyl benzimidazole-5-sulfonic acid;

2-phenyl-1H-benzimidazole-5-sulfonic acid

Ensulizole potassium

158099-19-5

Potassium phenylbenzimidazole sulfonate;

Potassium 2-phenylbenzimidazole-5-sulfonate;

Phenylbenzimidazole sulfonic acid potassium salt;

Potassium 2-phenyl-1H-benzimidazole-5-sulfonate;

2-Phenylbenzimidazole-5-sulfonic acid, potassium salt;

2-Phenyl-1H-benzimidazole-5-sulfonic acid potassium salt

Ensulizole sodium

5997-53-5

Sodium Phenylbenzimidazole Sulfonate;

Sodium 2-phenyl-5-benzimidazolesulfonate;

Phenylbenzimidazole sulfonic acid sodium salt;

2-Phenylbenzimidazole-5-sulfonic acid sodium salt;

2-Phenyl-1H-benzimidazole-5-sulfonic acid sodium salt;

1H-Benzimidazole-5-sulfonic acid, 2-phenyl-, monosodium salt

Ensulizole TEA

10020-01-6/73705-00-7

TEA-Phenylbenzimidazole Sulfonate;

Triethanolamine phenylbenzimidazole sulfonate;

Triethanolamine 2-phenylbenzimidazole-5-sulfonate

Bisdisulizole disodium

180898-37-7

Bisimidazylate;

Neo Heliopan AP;

Disodium phenyl dibenzimidazole tetrasulfonate

Tinuvin P

2440-22-4/

2240-22-4

Benazol P;

Drometrizole;

Chimassorb P;

UV Absorber P;

Photostabilizer P;

Light stabilizer P;

Ultraviolet Absorber UV-P;

Ultraviolet Absorbent UV-P;

2-(2H-Benzotriazol-2-yl)-p-cresol;

2-(2-Benzotriazolyl)-4-methylphenol;

2-(2H-Benzotriazol-2-yl)-4-Methylphenol;

2-(2-Hydroxy-5-methylphenyl)benzotriazole;

2-(2H-benzotriazol-2-yl)-4,6-ditertpentylphenol

Tinuvin 326

3896-11-5

Lowilite 26;

Uvazol 236;

Bumetrizole;

Chimassorb 326;

UV Absorber 326;

Photostabilizer 326;

UV Light Stabilizer 326;

Ultraviolet absorber UV-326;

Ultraviolet absorbent UV-326

Tinuvin 327

3864-99-1

UV 327;

Lowilite 27;

Uvinul 3027;

Songsorb 3270;

2,4-Di-tert-butyl-6-(5-chlorobenzotriazol-2-yl)phenol;

2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol;

2-(3,5-Di-tert-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole;

2-(2'-Hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole;

2-(5-Chloro-2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylethyl)-phenol

Tinuvin 328

25973-55-1

Chimassorb 328;

UV absorber 328;

Photostabilizer 328;

UV Light Stabilizer 328;

Ultraviolet absorber UV-328;

Ultraviolet absorbent UV-328;

2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol;

2-(2'-Hydroxy-3',5'-di-tert-pentylphenyl)-benzotriazole;

Phenol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)

Tinuvin 329

3147-75-9

Octrizole;

Viosorb 583;

Seesorb 709;

Cyasorb 5411;

Sumisorb 340;

Chimassorb 329;

Cyasorb UV 5411;

Ultraviolet absorber UV-329;

Ultraviolet absorbent UV-329;

2-(2-Hydroxy-5-tert-octylphenyl)benzotriazole;

2-(2H-Benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol;

2Phenol, 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)

7.Triazines and their derivatives

Triazine UV absorber is a new type of macromolecule UV absorber developed in recent years. It has similar mechanism to benzophenone UV absorber and benzimidazole UV absorber, and can effectively absorb 280 ~ 380nm UV light, but also absorbs a part of visible light, which makes the product yellow. The triazine ultraviolet absorber has high ultraviolet absorption efficiency, and can absorb ultraviolet rays of UVA and UVB at the same time. The ultraviolet absorption effect of triazine ultraviolet absorbers is related to the number of adjacent hydroxyl groups. The greater the number of adjacent hydroxyl groups, the stronger the ability to absorb ultraviolet rays. The introduction of different substituents reduces the basicity of the mesazine ring, improves the light resistance of the compound, and also improves the compatibility with the resin.

Name

Cas No.

Synonyms

1,3,5-Triazine

290-87-9

S-Triazine;

Cyanidine;

Vedita 250;

Sym-Triazine

Ethylhexyl Triazone

88122-99-0

EHT;

Koptrizon;

Uvinul T 150;

Octyl Triazone;

Light stabilizer 150;

Ultraviolet absorber UVT-150;

Ultraviolet absorbent UVT-150

Iscotrizinol

154702-15-5

Uvasorb HEB;

Diethylhexyl butamido triazone

Tinosorb S

187393-00-6

BEMT;

Escalol S;

CGF 1607;

FAT 70'884;

Bemotrizinol;

Anisotriazine;

Parsol Shield;

Tinosorb S Aqua;

Bis-ethylhexyloxyphenol methoxyphenyl triazine

Tinuvin 1577

147315-50-2

Ultraviolet absorber UV-1577;

Ultraviolet absorbent UV-1577;

2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-(hexyl)oxy-phenol

UV absorber triazine-5

63856-18-8

UV absorbent triazine-5;

Ultraviolet absorber triazine-5;

Ultraviolet absorbent triazine-5;

Trimethyl 3,3',3''-(2,4,6-trioxo-1,3,5-triazinane-1,3,5-triyl)tris(3-phenylpropanoate)

8.Dibenzoylmethane derivatives

Due to the existence of keto-enol tautomers, dibenzoylmethane ultraviolet absorbers have a strong absorption effect on ultraviolet rays in the 320-400nm band in tautomerization, and are a class of fat-soluble UVA absorbers. Among them, p-tert-butyldibenzoylmethane is a UV absorber developed by Swiss Givaudan company in the 1980s. It is widely used in daily chemicals, plastics, coatings, polymers and other fields. FDA approved long-wave UV absorber. Its enol structure has greater absorption at 345 nm, and its keto isomer has greater absorption at 260 nm. It is a good class of UVA absorbers, but it has the characteristics of low photochemical stability, including Avobenzone, crezotriazole trisiloxane, polysiloxane-15 and the like. Avobenzone is currently the most effective of the few UVA absorbers in the world. It can effectively absorb ultraviolet rays from 320 to 400nm, and can block some UVA-I, but it has a weak effect on UVA-II. Therefore, it is often mixed with Benzophenone-3, which can easily cause skin discomfort such as allergies. In addition, the main disadvantage of avobenzone is that the light stability is not high, it will gradually be decomposed and lose the sun protection effect after being irradiated with ultraviolet rays, especially with some sunscreen ingredients such as Octinoxate (OMC), it will be more unstable More easily decomposed by light. This ingredient also has a terrible disadvantage, which is that it has a certain dyeability. Therefore, pay attention when rubbing your neck, and avoid light-colored clothes.

Name

Cas No.

Synonyms

Uvinul A Plus

302776-68-7

DHHB;

Diethylamino Hydroxybenzoyl Hexyl Benzoate;

2-[4-(Diethylamino)-2-hydroxybenzoyl]benzoic acid hexyl ester

Parsol SLX

207574-74-1

Benzyli;

Polysilicone-15;

Dimethico-diethylbenzalmalonate;

Diethylbenzylidene malonate dimethicone;

Diethylmalonylbenzylidene oxypropene dimethicone

Avobenzone

70356-09-1

BMDBM;

Escalol 517;

Parsol 1789;

Eusolex 9020;

Butyl Methoxydibenzoylmethane;

4-tert-butyl-4'-methoxy-dibenzoylmethane

Mexoryl XL

155633-54-8

Silatrizole;

Drometrizole Trisiloxane

9.Others

Name

Cas No.

Synonyms

Hexamethylphosphoramide

680-31-9

HMPA;

HMPT;

HMPTA;

HEMPA;

Hexametapol;

Eastman Inhibitor HPT;

Hexamethylphosphoric triamide;

Hexamethylphosphoric acid triamide