Hydroquinone, 99%, Thermo Scientific Chemicals

Description

Hydroquinone is used as a reducing agent and finds applications in black and white photographic developers for film and paper along with 4-(methylamino)phenol sulfate (metol). In this application, silver halides are reduced to elemental silver. It acts as a polymerization inhibitor which prevents polymerization of acrylic acid, methyl methacrylate, cyanoacrylate and other monomers. It undergoes mild oxidation to convert into parabenzoquinone. It is also used as an intermediate to produce antioxidants for rubber and food.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
Hydroquinone is used as a reducing agent and finds applications in black and white photographic developers for film and paper along with 4-(methylamino)phenol sulfate (metol). In this application, silver halides are reduced to elemental silver. It acts as a polymerization inhibitor which prevents polymerization of acrylic acid, methyl methacrylate, cyanoacrylate and other monomers. It undergoes mild oxidation to convert into parabenzoquinone. It is also used as an intermediate to produce antioxidants for rubber and food.

Solubility
Soluble in water, methanol, ethanol, diethyl ether, acetone, benzene and carbon tetrachloride.

Notes
Air and light sensitive. Incompatible with strong bases and strong oxidizing agents.

Specifications

Chemical Identifiers

• CAS: 123-31-9
• Molecular Formula: C6H6O2
• Molecular Weight (g/mol): 110.112
• MDL Number: MFCD00002339
• InChI Key: QIGBRXMKCJKVMJ-UHFFFAOYSA-N
• Synonym: hydroquinone, 1,4-benzenediol, quinol, 1,4-dihydroxybenzene, p-benzenediol, 4-hydroxyphenol, p-hydroquinone, p-hydroxyphenol, p-dihydroxybenzene, benzoquinol
• PubChem CID: 785
• ChEBI: CHEBI:17594
• IUPAC Name: benzene-1,4-diol
• SMILES: C1=CC(=CC=C1O)O

• Melting Point: 170°C to 172°C
• Density: 1.32
• pH: 3.75
• Boiling Point: 285°C to 287°C
• Flash Point: 165°C (329°F)
• Odor: Odorless
• Quantity: 250 g
• UN Number: UN3077
• Beilstein: 605970
• Sensitivity: Air and light sensitive
• Merck Index: 14,4808
• Solubility Information: Soluble in water,methanol,ethanol,diethyl ether,acetone,benzene and carbon tetrachloride.
• Formula Weight: 110.11
• Percent Purity: 99%
• Chemical Name or Material: Hydroquinone

Safety and Handling

Hazard Category	H302-H317-H318-H335-H341-H351-H500
Hazard Statement	GHS H Statement H318-H341-H351-H302-H317 Causes serious eye damage. Suspected of causing genetic defects. Suspected of causing cancer. Harmful if swallowed. May cause an allergic skin reaction.
Precautionary Statement	P201-P202-P261-P264b-P270-P271-P272-P280g-P281-P301+P312-P302+P352-P304+P340-P305+P351+P338-P308+P313-P310-P330-P333+P313-P363-P501c
DOTInformation	Transport Hazard Class: 9; Packing Group: III; Proper Shipping Name: ENVIRONMENTALLY HAZARDOUS SUBSTANCES, SOLID, N.O.S.
EINECSNumber	204-617-8
RTECSNumber	MX3500000
TSCA	Yes
Recommended Storage	Ambient temperatures; Store under Argon

SDS

RUO – Research Use Only