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Hydroquinone
Hydroquinone CAS 123-31-9

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Hydroquinone (CAS:123-31-9) is a white needle crystals. Soluble in hot water, ethanol and ether,

slightly soluble inbenzene.Hydroquinone has a variety of uses principally associated with its action as a reducing agent that is soluble in water. It is a major component in most black and white photographic developers for film and paper where, with the compound Metol, it reduces silver halides to elemental silver. In human medicine, hydroquinone is used as a topical application in skin whitening to reduce the color of skin.


Specification of Hydroquinone

 Assay, % max.    99.00~101.00
 Melting point, ℃   171.00~175.00
Residue on ignition, %  ≤ 0.05
 Fe, %  ≤ 0.002
 Pb, %  ≤ 0.001
 Solution appearance  Transparent without insoluble substance


Application of Hydroquinone

Hydroquinone has a variety of uses principally associated with its action as a reducing agent that is soluble in water. It is a major component in most black and white photographic developers for film and paper where, with the compound Metol, it reduces silver halides to elemental silver.

There are various other uses associated with its reducing power. As a polymerization inhibitor, hydroquinone prevents polymerization of acrylic acid, methyl methacrylate, cyanoacrylate, and other monomers that are susceptible to radical-initiated polymerization. This application exploits the antioxidant properties of hydroquinone.

Hydroquinone can undergo mild oxidation to convert to the compound parabenzoquinone, C6H4O2, often called p-quinone or simply quinone. Reduction of quinone reverses this reaction back to hydroquinone. Some biochemical compounds in nature have this sort of hydroquinone or quinone section in their structures, such as Coenzyme Q, and can undergo similar redox interconversions.

Hydroquinone can lose an H+ from both to form a diphenolate ion. The disodium diphenolate salt of hydroquinone is used as an alternating comonomer unit in the production of the polymer PEEK.

-- Used as raw materials of imaging agent and dyes,etc.

-- Used as important intermediates of Herbicides,etc.
-- Used as important intermediates of Medicine,etc.

Packing
25kg per pp bag;
16mt per 20ft container with pallets;18 mt without pallets

Storage & Handling

Stored in cool and airy place; away from fire and heat; handle with care;no breakage, avoid leakage.

It is valid for 2 years under proper condition.

Hydroquinone is classified as Dangerous Good for transport (UN 3077, Class 9, Packing group III)

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