Description

Quick Details

Chemical Name: Hydroquinone

Synonyms: 1,4-Benzenediol/1,4-Dihydroxybenzene

CAS No.: 123-31-9

Grade: Photo grade/photographic grade.

Molecular Formula: C6H6O2

Chemical Structure:

Molecular weight: 110.11

Appearance: White acicular crystal or crystal powder

Assay: 99%

Typical Properties

Item	Specifications
Appearance	White acicular crystal or crystal powder
Content	99.00～100.50%
Melting point	171～175℃
Boiling point	285 – 287°C (760 mmHg)
Density	1.33 g/cm³ (15°C)
Refractive index	1.632
Iron (Fe)	≤0.002%
Heavy metals (as Pb)	≤0.002%
Residue after ignition	≤0.100%

Application

Photographic Chemicals: Used as a developer, one of the main components of traditional black and white developers.

Highly Effective Polymerization Inhibitor: Used as a polymerization inhibitor and a highly efficient thermal polymerization inhibitor during monomer storage and transportation.

Rubber and Plastics Additives: Used in the manufacture of rubber antioxidants, anti-aging agents, and stabilizers for synthetic resins.

Cosmetics and Pharmaceuticals (Strictly Controlled): Used as a tyrosinase inhibitor in dermatological and some whitening and spot-removing skincare products, serving as an active ingredient to reduce melanin production (concentration used must strictly comply with local regulations).

Metal Determination and Reducing Agent: Can be used for polarographic and volumetric determination of iridium. Can be used as a reducing agent for heteropoly acids and some metals.

Water Treatment: Can inhibit corrosion of metals on the water side; can be used as a deoxygenating agent for boiler water.

Packaging and Shipping

25kg/bag or 25kg/fiber drum, or customized according to specific requirements.

Storage

Must be kept in tightly closed containers and stored in a cool, dry, well-ventilated dedicated warehouse. Protect from light, fire, and heat sources.

Hydroquinone/1,4-Dihydroxybenzene CAS 123-31-9

Description

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