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1324002

USP

Hydroquinone

United States Pharmacopeia (USP) Reference Standard

Synonym(s):

1,4-Benzenediol, 1,4-Dihydroxybenzene, HQ

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About This Item

Linear Formula:
C6H4-1,4-(OH)2
CAS Number:
123-31-9
Molecular Weight:
110.11
Beilstein:
605970
MDL number:
MFCD00002339
UNSPSC Code:
41116107
PubChem Substance ID:
329750111
NACRES:
NA.24

grade

pharmaceutical primary standard

vapor density

3.81 (vs air)

vapor pressure

1 mmHg ( 132 °C)

API family

hydroquinone

autoignition temp.

930 °F

manufacturer/tradename

USP

bp

285 °C (lit.)

mp

172-175 °C (lit.)

application(s)

pharmaceutical (small molecule)

format

neat

SMILES string

Oc1ccc(O)cc1

InChI

1S/C6H6O2/c7-5-1-2-6(8)4-3-5/h1-4,7-8H

InChI key

QIGBRXMKCJKVMJ-UHFFFAOYSA-N

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General description

This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including SDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia.For further information and support please go to the website of the issuing Pharmacopoeia.

Application

Hydroquinone USP reference standard, intended for use in specified quality tests and assays as specified in the USP compendia.
Also, for use with USP monographs such as:
  • Hydroquinone Cream
  • Hydroquinone Topical Solution

Analysis Note

These products are for test and assay use only. They are not meant for administration to humans or animals and cannot be used to diagnose, treat, or cure diseases of any kind.  ​

Other Notes

Sales restrictions may apply.

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Description
Pricing

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 2 - Eye Dam. 1 - Muta. 2 - Skin Sens. 1B

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

329.0 °F - closed cup

Flash Point(C)

165 °C - closed cup

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Critical reviews in toxicology, 29(3), 283-330 (1999-06-24)
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