White To Pale Yellow Powder Avobenzone Cas 70356-09-1

CAS: 70356-09-1

Molecular Formula: C20H22O3

Molecular Weight: 310.39

EINECS: 274-581-6

Synonyms: AVOBENZONE; EUSOLEX(R) 9020; 4-tert-butyl-4'-methoxy-dibenzoylmethane; 4-T-BUTYL-4'-METHOXY-DIBENZOYLMETHANE; 1-(4-(1,1-Dimethylethyl)phenyl)-3-(4-methoxyphenyl)-1,3-propanedione; 1-(4-TERT-BUTYLPHENYL)-3-(4-METHOXYPHENYL) 1,3-PROPANEDIOL; 1-(P-T-BUTYLPHENYL)-3-(P-METHOXYPHENYL)-1,3-PROPANEDIONE; PARSOL 1789

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What is Avobenzone Cas 70356-09-1?

There are many kinds of ultraviolet absorbers, among which phenylketone ultraviolet absorbers are widely used and have great practical research value. Avobenzone is a kind of benzone ultraviolet absorbent, and is also a very important organic synthesis intermediate.

Specification

ITEM	STANDARD	RESULT
Appearance	White to pale yellow powder	Pale yellow powder
Identity(IR)	Matches reference spectrum	Conform
Identity (Retention time)	Matches reference retention time	Conform
UV specific extinction	1100-1180	1170
Melting point	81.0℃-86.0℃	83.8℃-84.6℃
Chromatographic purity(GC)	Each impurity ≤3.0%	1.2%
Chromatographic purity(GC)	Total impurities ≤4.5%	1.4%
Residual solvents	Methanol ≤3000ppm	Conform
Residual solvents	Toluene ≤890ppm	Conform
Microbial purity	Total amount of aerobe ≤100CFU/g	Conform
Microbial purity	Total yeast and moulds ≤100CFU/g	Conform
Loss on drying	≤0.5%	0.03%
Assay(GC)	95.0-105.0%	100.1%

Application

Avobenzone is a synthetic ultraviolet absorber, which is a good UV-A (>320nm) ultraviolet absorber. It can block UVA at full wavelength (320-400nm). It is an efficient broad-spectrum oil-soluble UVA filter. It can provide all UVA and UVB protection when combined with other UVB sunscreen agents to prevent skin cancer caused by light.