Benzophenone, an aromatic ketones (diphenyl ketone), is an important compound in
organic photochemistry and perfumery as well as in organic synthesis. It is a
white crystalline substance with rose-like odor; insolube in water; melting
point 49 C; boiling point 305 - 306 C. Benzophenone is used as a constituent of
synthetic perfumes and as a starting material for the manufacture of dyes,
pesticides and drugs (especially anxiolytic and hypnotic drugs). Benzophenone is used as a photoinitiator of UV-curing
applications in inks, adhesive and coatings, optical fiber as well as in printed
circuit boards. Photoinitiators are compounds that break down into free radicals
upon exposure to ultraviolet radiation. Photoinitiators undergo a unimolecular
bond cleavage upon irradiation to yield free radicals (benzoin esters; benzil
ketals; alpha-dialkoxy acetophenones; alpha-hydroxy alkylphenones; alpha-amino
alkylphosphine; acylphosphine oxides). Another type of photoinitiators undergo a
bimolecular reaction where the excited state of the photoinitiator interacts
with a second molecule (a coinitiator) to generate free radicals (benzophenones,
amines; thioxanthones, titanocenes). Ultraviolet radiation has more energy than
visible light, and thus degrade the physical properties such as the appearance
of organic substances and plastics. Benzophenones can act as optical filters or
deactivate substrate molecules that have been excited by light for the
protection polymers and organic substances. They, cosmetic grades, are used as
sunscreen agents to reduce skin damage by blocking UV-A, B.
Chemical
ingredients for sunscreen are;
- p-Aminobenzoic acids
- p-Aminobenzoic acid
(CAS #: 150-13-0)
- p-Aminobenzoic Acid, monoglyceryl Ester
(CAS #: 136-44-7)
- p-Aminobenzoic Acid, octyl dimethyl Ester (Padimate 0,
CAS #: 21245-02-3)
- p-Aminobenzoic Acid, ethyl dihydroxypropyl (Roxadimate,
CAS #: 58882-17-0)
- p-Aminobenzoic Acid,
2,4-dihydroxy-N-(3-hydroxypropyl)-3,3-dimethylbutanamide ester
- Octyl Triazone
(CAS #: 88122-99-0)
- p-Aminobenzoic Acid, PEG-25
(CAS #: 116242-27-4)
- Anthranilates
- Menthyl anthranilate
(CAS #: 134-09-8)
- Benzophenones
- Benzophenone
(CAS #: 119-61-9)
- 2,4-Dihydroxybenzophenone
(Benzophenone-1, CAS #: 131-56-6)
- 2,2',4,4'-Tetrahydroxybenzophenone
(Benzophenone-2, CAS #: 131-55-5)
- 2-Hydroxy-4-methoxybenzophenone (Benzophenone-3, Oxybenzone,
CAS #: 131-57-7)
- 2-Hydroxy-4-methoxybenzophenone-5-sulfonic Acid
(Benzophenone-4, Sulisobenzone, CAS #: 4065-45-6
- 2-Hydroxy-4-methoxybenzophenone-5-sulfonic Acid, Monosodium Salt
(Benzophenone-5, CAS #: 6628-37-1)
- 2,2'-Dihydroxy-4,4'-dimethoxybenzophenone
(Benzophenone-6, CAS #: 131-54-4)
- 5-Chloro-2-hydroxybenzophenone (Benzophenone-7, CAS
#: 85-19-8)
- 2,2'-Dihydroxy-4-methoxybenzophenone (Benzophenone-8, Dioxybenzone,
CAS #: 131-53-3)
- 2,2'-Dihydroxy-4,4'-dimethoxybenzophenone-5,5'-disulfonic Acid Sodium Salt
(Benzophenone-9, CAS #: 76656-36-5)
- 2-Hydroxy-4-methoxy-4'-methyl-benzophenone
(Benzophenone-10, Mexenone, CAS #: 1641-17-4)
- Bis(2,4-ihydroxyphenyl)Methanone (Benzophenone-11,
CAS #: 1341-54-4)
- 2-Hydroxy-4-(Octyloxy)Benzophenone
(Benzophenone-12, Octabenzone, CAS #: 1843-05-6)
- 2,2'-Dihydroxy-4-methoxybenzophenone
[Dioxybenzone, CAS #: 131-53-3)
- 2-Hydroxy-4-methoxybenzophenone (Oxybenzone,
CAS #: 131-57-7)
- 2-Hydroxy-4-methoxybenzophenone-5-sulphonic Acid (Sulisobenzone,
CAS #: 4065-45-6)
- Camphors
- Benzylidene Camphor Sulfonic Acid (CAS
#: 56039-58-8)
- 3-Benzylidene
Camphor (CAS #: 15087-24-8)
- Polyacrylamidomethyl Benzylidene Camphor
(CAS #: 113783-61-2)
- Terephthalylidene Dicamphor Sulfonic Acid
(CAS #: 90457-82-2)
- 3-(4-Methylbenzyliden)Camphor (CAS
#: 36861-47-9)
- Camphor
Benzalkonium Methosulfate (CAS #: 52793-97-2)
- Bornelone (CAS
#: 2226-11-1)
- Cinnamates
- Ethyl Cinnamate
(CAS #: 103-36-6)
- 2-Ethoxyethyl-p-methoxycinnamate (Cinoxate, CAS
#: 104-28-9)
- Isoamyl
P-methoxycinnamate (CAS #: 71617-10-2)
- Diisopropyl Methyl Cinnamate
(CAS #: 32580-71-5)
- 2-Ethylhexyl Alpha-cyano-beta-phenylcinnamate (Octocrylene,
CAS #: 6197-30-4)
- Diethanolamine Methoxycinnamate (CAS
#: 56265-46-4)
- Isopropyl
Methoxycinnamate (CAS #: 5466-76-2)
- Isoamyl P-methoxycinnamate
(CAS #: 71617-10-2)
- Glyceryl Octanoate Dimethoxycinnamate
- Ethyl
Diisopropylcinnamate (CAS #: 32580-72-6)
- Ethyl Methoxycinnamate
(CAS #: 99880-64-5)
- Octyl Methoxycinnamate
(CAS #: 5466-77-3)
- Dibenzoylmethanes
- Dibenzoylmethane
(CAS #: 120-46-7)
- Isopropyl
Dibenzoylmethane (Eusolex,
CAS #: 63250-25-9)
- 4-tert-Butyl-4'-methoxy-dibenzoylmethane
(Avobenzone, CAS #: 70356-09-1)
- Salicylates
- 3,3,5-Trimethylcyclohexyl Salicylate (Homosalate,
CAS #: 118-56-9)
- Benzyl Salicylate (CAS
#: 118-58-1)
- Octyl Salicylate
(CAS #: 118-60-5)
- 2-Hydroxyethyl Salicylate (CAS
#: 87-28-5)
- Menthyl Salicylate
(CAS #: 89-46-3)
- Isopropylbenzyl Salicylate (CAS
#: 94134-93-7)
- Imidazoles
- Phenylbenzimidazole
- Phenylbenzimidazol-5-sulfonic
Acid (CAS #: 27503-81-7)
- Phenylbenzimidazole Tea Sulfonate (CAS
#: 73705-00-7)
- Urocanic
Acid [4-imidazoleacrylic Acid, CAS #: 104-98-3]
- Ethyl Urocanate
(CAS #: 27538-35-8)
- Bisymidazylate (CAS
#: 180898-37-7)
- Sodium Phenylbenzimidazole
Sulfonate (CAS #: 5997-53-5)
- Others
- Petrolatum Jelly (CAS
#: 8009-03-8)
- Ethyl
2-cyano-3,3-diphenylacrylate (Etocrilene, CAS #: 5232-99-5)
- Diurethane
Dimethacrylate (CAS #: 103597-45-1)
- Drometrizole Trisiloxane
(CAS #: 155633-54-8)
- Bis(Ethylhexyloxyphenol Methoxyphenol) Triazine
(CAS #: 187393-00-6
- 2-(2-Hydroxy-5-methyl-phenyl)Benzotriazole (Drometrizole,
CAS #: 2440-22-4)
- Dioctyl Butamido Triazone (CAS
#: 154702-15-5)
- Inorganic
compounds (physical sunscreens)
- Titanium dioxide
- Zinc oxide
|
Number
|
Chemical
name
|
CAS
RN
|
Benzophenone-1
|
2,4-Dihydroxybenzophenone |
131-56-6
|
Benzophenone-2
|
2,2',4,4'-Tetrahydroxybenzophenone |
131-55-5
|
Benzophenone-3
|
Oxybenzone |
131-57-7
|
Benzophenone-4
|
Sulisobenzone |
4065-45-6
|
Benzophenone-5
|
2-Hydroxy-4-methoxybenzophenone-5-sodium sulfonate |
6628-37-1
|
Benzophenone-6
|
2,2'-Dihydroxy-4,4'-dimethoxybenzophenone |
131-54-4
|
Benzophenone-7
|
Chlorohydroxy benzophenone |
85-19-8
|
Benzophenone-8
|
Dioxybenzone |
131-53-3
|
Benzophenone-9
|
Disodium 2,2'-dihydroxy-4,4'-dimethoxy-5,5'-disulfobenzophenone |
3121-60-6
|
Benzophenone-10
|
Mexenone |
1641-17-4
|
Benzophenone-11
|
Bis(2,4-dihydroxyphenyl)methanone |
1341-54-4
|
Benzophenone-12
|
Octabenzone |
1843-05-6
|
|