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GK9119 Hydroquinone, USP grade

Synonyms: 1,4-Benzenediol; 1,4-Dihydroxybenzene; HQ; Quinol
Structure for Hydroquinone, USP grade (123-31-9)
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Large structure for Hydroquinone, USP grade (123-31-9)

Structure for Hydroquinone, USP grade (123-31-9)

CAS: 123-31-9

MF: C6H6O2

MW: 110.11

Assay: 99.0 - 100.5 % (anhydrous basis)

GK9119 Hydroquinone, USP grade

Synonyms: 1,4-Benzenediol; 1,4-Dihydroxybenzene; HQ; Quinol

CAS: 123-31-9 MF: C6H6O2 MW: 110.11

Assay: 99.0 - 100.5 % (anhydrous basis)    |    SDS    |    Specification
This product has no catalogue prices. Quotation requests are welcomed using the form below.
Hydroquinone (quinol) is a type of phenol and an aromatic organic compound. It is used topically as a skin lightening agent in cosmetics. Other uses are in the chemical and photographic industries where it often acts as a reducing agent. Occurs naturally in several beetle and fungi. Hydroquinone USP is a pharmaceutical grade material.
Glentham Code
EC Number
MDL Number
Storage Temperature
Shipping Temperature
Harmonised Tariff Code
Physical Description
White to off-white crystalline powder or flakes
A, B, C according to USP
Melting Point
172 - 174 °C
Residue on Ignition
≤ 0.5%
Water (KF)
≤ 0.5%
99.0 - 100.5 % (anhydrous basis)
Pharmacopoeia Specification(s)
Specification Version
MSDS pictograms MSDS pictograms MSDS pictograms MSDS pictograms
Signal word
Hazard statements
H302: Harmful if swallowed.
H317: May cause an allergic skin reaction.
H318: Causes serious eye damage.
H341: Suspected of causing genetic defects.
H351: Suspected of causing cancer.
H400: Very toxic to aquatic life.
Precautionary statements
P261: Avoid breathing dust/fume/gas/mist/vapours/spray.
P273: Avoid release to the environment.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P281: Use personal protective equipment as required.
P301 + P312: IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P308 + P313: IF exposed or concerned: Get medical advice/attention.
UN Number
UN3077 - 9 - PG III
If you are publishing research using GK9119 please contact us to contribute to our list of citations.
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