UV Absorber UV-9, UV absorber UV-9, Oxybenzone, Ultraviolet absorber UV-9, 2-Hydroxy-4-methoxybenzophenone, 131-57-7

2-Hydroxy-4-methoxybenzophenone

CAS: 131-57-7

Molecular Formula: C14H12O3

Names and Identifiers

Physico-chemical Properties

Risk and Safety

Hazard Symbols	Xi - Irritant
Risk Codes	36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description	S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S37 - Wear suitable gloves.
UN IDs	UN 3077 9/PG III
WGK Germany	2
RTECS	DJ1575000
TSCA	Yes
HS Code	29145000
Hazard Class	9
Packing Group	III
Toxicity	LD50 orally in rats: >12.8 g/kg (Lewerenz)

Upstream Downstream Industry

Preparation method

Resorcinol reacts with dimethyl sulfate in sodium hydroxide solution to obtain resorcinol dimethyl ether, which then undergoes a Fourier reaction with benzoyl chloride catalyzed by aluminum trichloride. The resulting product is hydrolyzed to obtain a product.

safety

The oral median lethal dose (LD50) of rats is 7.4g/kg, and the allowable intake for humans is 3.3mg/kg body weight. This product should be stored in a ventilated, dry, and tidy warehouse to avoid being stored together with other acidic chemicals.

Introduction

UV absorber UV-9 is light yellow or white crystalline powder, also known as Sunscreen No. 2, BP-3, suitable for polyvinyl chloride, polyvinylidene chloride, polymethyl methacrylate, unsaturated polyester, ABS resin and cellulose resin and other plastics, the maximum absorption wavelength range is 280-340 nm, the general dosage is 0.1-1.5%, good thermal stability, does not decompose at 200. This product hardly absorbs visible light, so it is suitable for light-colored transparent products. This product can also be used for paint and synthetic rubber. For the broad-spectrum UV absorber, with high absorption rate, non-toxic, non-teratogenic effect, good light, thermal stability and other advantages, UV absorber UV-9 can absorb UV-A and UV-B at the same time, it is a Class I sunscreen agent approved by the FDA in the United States and Europe. It is widely used in sunscreen cosmetics such as sunscreen cream, cream, honey, lotion and oil UV-9, it can also be used as an anti-discoloration agent for products that change color by photosensitivity. In addition, because UV-9 has good compatibility with many plastics and resins, it is usually used in many fields such as PVC and unsaturated polyester.

A UV absorber is a light stabilizer that absorbs the UV portion of sunlight and fluorescent light without itself changing. The plastic is protected from the photo-oxidative degradation caused by ultraviolet radiation, thus greatly extending the service life of the product. Plastic and other polymer materials in the sun and fluorescence, due to the action of ultraviolet light, produce automatic oxidation reaction, resulting in degradation of the polymer and deterioration, so that the appearance and mechanical properties. Such high-energy ultraviolet rays can be selectively absorbed by the addition of an ultraviolet absorber, and become harmless energy to be released or consumed. Different types of polymers have different wavelengths of ultraviolet rays that deteriorate them. Different ultraviolet absorbers can absorb ultraviolet rays of different wavelengths. When used, the ultraviolet absorber should be selected according to the type of polymer.

UV absorber should meet the following conditions:

1. can strongly absorb ultraviolet rays (especially the wavelength of 290-400nm);
2. good thermal stability, even in the processing will not change due to heat, heat volatile;
3. good chemical stability, no adverse reaction with the material components in the product;
4. good miscibility, can be evenly dispersed in the material, no frost, no exudation;
5. The photochemical stability of the absorbent itself is good, no decomposition, no discoloration;
6. colorless, non-toxic, odorless;
7. resistance to immersion;
8. it is cheap and easy to obtain.

UV absorbers according to the chemical structure can be divided into the following categories: salicylates, benzophenones, benzotriazoles, substituted acrylonitrile, triazines and other classes. UV absorbers are used in plastics, paints, dyes, automotive windshields, cosmetics, pharmaceuticals, sunscreens, etc.

Common UV absorbers

• salicylate phenyl ester (component: phenyl O-hydroxybenzoate),
• UV absorber UV-P (Composition: reaction product of O-nitroaniline and p-cresol),
• UV absorber UV-O (Composition: 2, 4-dihydroxybenzophenone),
• UV absorber UV-9 (Composition: 2-hydroxy-4-methoxybenzophenone),
• UV absorber UV-531 (component: 2-hydroxy-4-octyloxy benzophenone),
• UV absorber UVP-327 (Composition: 2-(2 '-hydroxy-3',5 '-di-tert-phenyl)-5-benzotriazole chloride),
• UV absorber RMB (component: resorcinol monobenzoate),
• light stabilizer AM-101 (Composition: 2,2 '-thiobis (4-tert-octylphenoxy) nickel),
• light stabilizer GW-540 (Composition: Tris (1,2,2,6, 6-pentamethylpiperidinyl) phosphite),
• light stabilizer 744 (Composition: 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine),
• light stabilizer HPT (component: hexamethylphosphoryl triamine)

Other uses

used in plastic, chemical fiber, paint and petroleum products, especially for light-colored transparent products

can be used for paint and a variety of plastic products, polyvinyl chloride, polyester, acrylic, resin, polystyrene and light transparent furniture and other particularly effective, but also good cosmetic additives. Dosage: 0.1-0.5%.

Cu(II) gravimetric determination reagent

benzophenone UV absorber, polyethylene and other synthetic plastics excellent stabilizer, the amount of 0.5 ~ 1.5%, can also be used in paint, pigment, coating industry, white wax and daily cosmetics.

Reference Information

UV absorbers

UV absorbers are compounds used in various materials and products to absorb or attenuate ultraviolet (UV) radiation from sunlight. These compounds are designed to prevent or reduce the harmful effects of UV radiation, which can include damage to materials, degradation of colors, and adverse health effects on living organisms. UV absorbers work by absorbing UV radiation energy and dissipating it as heat, thereby protecting materials and enhancing their durability. They are commonly incorporated into plastics, coatings, textiles, and personal care products like sunscreens to provide UV protection.