Solvents
REACH
Benzene
CAS Number
71-43-2
EC Number
200-753-7
What is Benzene?
Benzene (CAS 71-43-2) is a foundational aromatic hydrocarbon used as a chemical intermediate and solvent in petrochemical and industrial manufacturing.
Where is Benzene used?
- Petrochemicals: primary building block for downstream chemicals at industrial scale
- Largest commercial use in production of ethylbenzene, cumene and cyclohexane
- These intermediates feed into styrene, phenol and nylon supply chains.
- Pharmaceuticals: process solvent and precursor in synthesis of active ingredients and fine chemicals
- Dyes and pigments: benzene-derived intermediates for colorants in printing inks and packaging materials
- Detergent alkylates and rubber processing chemicals for personal care and industrial formulations
Commercial specifications
- Purity commonly 99.9% or higher
- Procurement through petrochemical distributors or direct refinery supply agreements
Other Names (Synonyms)
phenyl hydride|cyclohexa-1,3,5-triene|C6H6|bicarburet of hydrogen|benzolene|benzole|benzol|[6]annulene
What are the physical properties of Benzene?
Melting Point 5.5 °C
Boiling Point 80.1 °C
Density 0.8787 g/cm³ @ Temp: 15 °C
Flash Point 12 °F
Appearance Benzene is a clear, volatile, colorless, highly flammable liquid with a pleasant, characteristic odor.
Color APHA: ≤10
Odor Paint-thinner-like odor detectable at 12 ppm
Form Liquid
Water Solubility 0.18 g/100 mL
Vapor Pressure 166 mm Hg ( 37.7 °C)
Refractive Index n 20/D 1.501(lit.)
Log P 2.130
How is Benzene classified and handled safely? Learn More
Danger
GHS02· Flammable GHS07· Irritant GHS08· Health Hazard GHS09· Environmental Hazard
Hazard Statements
H225 Highly Flammable liquid and vapor
H302 Harmful if swallowed
H304 May be fatal if swallowed and enters airways
H315 Causes skin irritation
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.
Which trade and regulatory codes apply to Benzene?
HS Code 29022000
UN Number 1114
ADR Class 3
Packing Group II
Storage Class 3 - Flammable liquids
WGK (Germany) 3