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Hydroquinone

Name: Hydroquinone
Brand: SIAL

meets USP testing specifications

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

UNSPSC Code:

41116107

NACRES:

NA.77

PubChem Substance ID:

24895587

EC Number:

204-617-8

Beilstein/REAXYS Number:

605970

MDL number:

MFCD00002339

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Properties

Quality Segment

200

agency

USP/NF, meets USP testing specifications

vapor density

3.81 (vs air)

vapor pressure

1 mmHg ( 132 °C)

assay

99.0-100.5% anhydrous basis

autoignition temp.

930 °F

bp

285 °C (lit.)

mp

172-175 °C (lit.)

suitability

suitable for pesticide residue analysis

application(s)

pharmaceutical (small molecule)

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

Description

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This Item	1324002	H9003	PHR1469
Sigma-Aldrich H3660 Hydroquinone	USP 1324002 Hydroquinone	Sigma-Aldrich H9003 Hydroquinone	Supelco PHR1469 Hydroquinone
description meets USP testing specifications	description United States Pharmacopeia (USP) Reference Standard	description ReagentPlus^®, ≥99%	description Pharmaceutical Secondary Standard; Certified Reference Material
assay 99.0-100.5% anhydrous basis	assay -	assay ≥99%	assay -
Quality Level 200	Quality Level -	Quality Level 200	Quality Level 300
mp 172-175 °C (lit.)	mp 172-175 °C (lit.)	mp 172-175 °C (lit.)	mp 172-175 °C (lit.)
application(s) pharmaceutical (small molecule)	application(s) pharmaceutical (small molecule)	application(s) -	application(s) pharmaceutical (small molecule)
vapor pressure 1 mmHg ( 132 °C)	vapor pressure 1 mmHg ( 132 °C)	vapor pressure 1 mmHg ( 132 °C)	vapor pressure 1 mmHg ( 132 °C)
vapor density 3.81 (vs air)	vapor density 3.81 (vs air)	vapor density 3.81 (vs air)	vapor density 3.81 (vs air)

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Pictograms

GHS08,GHS05,GHS07,GHS09

Signal Word

Danger

Hazard Codes

H302,H317,H318,H341,H351,H410

Precautionary Statements

P273 - P280 - P301 + P312 - P302 + P352 - P305 + P351 + P338 - P308 + P313

Hazard Classifications

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

Storage Class

11 - Combustible Solids

Flash Point (°F)

329.0 °F - closed cup

Flash Point (°C)

165 °C - closed cup

PPE (personal protective equipment)

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

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