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mono-Methyl terephthalate CAS 1679-64-7 pack

Hydroquinone with CAS 123-31-9

CAS:123-31-9
Molecular Formula:C6H6O2
Molecular Weight:110.11
EINECS:204-617-8

Synonyms:HYDROQUINONE USP(P); p-Benzediel; HYDROQUINONE(P); 1,4-Benzenediol (hydroquinone); 1,4-Dihydroxy-benzeen; 1,4-Dihydroxybenzen; 1,4-dihydroxybenzen(czech); 1,4-Dihydroxy-benzol; 1,4-Diidrobenzene; 4-Hydroxyphenol; alpha-hydroquinon

What is Hydroquinone？

Hydroquinone, also known as hydroquinone or 1,4-benzenediol. Molecular formula C6H6O2. Molecular weight 110.11. Colorless or white crystals. It is easy to change color when exposed to light in the air. Its aqueous solution can oxidize to brown in air, and oxidizes faster in alkaline media.

Specification

Product Name:	Hydroquinone	Batch No.	JL20211025
Cas	123-31-9	MF Date	OCT.25,2021
Packing	25KGS/BAG	Analysis Date	OCT.25,2021
Quantity	5MT	Expiry Date	OCT.24,2023
Item	Standard		Result
Appearance	White crystalline powder		Conforms
Assay %	99-101		99.9
Melting point	171-175		171.9-172.8
Residue after ignition %	≤0.05		0.02
Fe %	≤0.002		＜0.002
Pb %	≤0.002		＜0.002
Conclusion	Conforms

Application

hydroquinone is a pigment-lightening agent used in bleaching creams. Hydroquinone combines with oxygen very rapidly and becomes brown when exposed to air. Although it occurs naturally, the synthetic version is the one commonly used in cosmetics. Application to the skin may cause allergic reaction and increase skin sun sensitivity. Hydroquinone is potentially carcinogenic and is associated with causing ochronosis, a discoloration of the skin. The u.S. FDA has banned hydroquinone from oTC cosmetic formulations, but allows 4 percent in prescription products.