Hydroquinone AR (CAS 123-31-9)

Molecular structure

Chemical Product

HYDROQUINONE AR

Cat. NoKC.810064 CategoryOther Molecular FormulaC6H6O2 CAS123-31-9 Molecular Weight110.11 g/mol

Pack sizes 100GM500GM

Safety & Hazards (GHS) Danger

Corrosive

Irritant

Health hazard

Environmental hazard

⚠️ For information only; not a substitute for the official Safety Data Sheet (SDS).

Hydroquinone is a metabolite found in or produced by Escherichia coli (strain K12, MG1655).

CIR ingredient: Hydroquinone
Plastic Composites Manufacturing [Category: Industry]
Photographic Processing [Category: Other]
... Used extensively in the vinyl monomer industry to inhibit free-radical polymerization during both processing and storage ... Used as stabilizers for unsaturated polyester resins.

Physical Description	Hydroquinone appears as light colored crystals or solutions. May irritate the skin, eyes and mucous membranes. Mildly toxic by ingestion or skin absorption.
Color/Form	White crystals
Odor	Odorless
Melting Point	338 to 340 °F (EPA, 1998)
Boiling Point	545 to 549 °F at 760 mmHg (EPA, 1998)
Flash Point	329 °F (EPA, 1998)
Density	1.332 at 59 °F (EPA, 1998) - Denser than water; will sink
Solubility	10 to 50 mg/mL at 68 °F (NTP, 1992)
Vapor Pressure	4 mmHg at 302 °F (EPA, 1998)
Refractive Index	Index of refraction = 1.632 at 25 °C
Stability/Shelf Life	Its solution becomes brown in air due to oxidation.

IUPAC Name	benzene-1,4-diol
Molecular Formula	C6H6O2
Molecular Weight	110.11 g/mol
CAS	123-31-9
SMILES	C1=CC(=CC=C1O)O
InChIKey	QIGBRXMKCJKVMJ-UHFFFAOYSA-N
Catalog No	KC.810064
Pack sizes	100GM · 500GM

⚠️ For information only; not a substitute for the official SDS.