Benzene;Benzol Phenyl hydride Cyclohexatriene Coalnaphtha;Phene (CAS#71-43-2)

Chemical Property:

Molecular Formula	C6H6
Molar Mass	78.11
Density	0.874 g/mL at 25 °C (lit.)
Melting Point	5.5 °C (lit.)
Boling Point	80 °C (lit.)
Flash Point	12°F
Water Solubility	0.18 g/100 mL
Solubility	Miscible with alcohol, chloroform, dichloromethane, diethyl ether, acetone and acetic acid.
Vapor Presure	166 mm Hg ( 37.7 °C)
Vapor Density	2.77 (vs air)
Appearance	Liquid
Color	APHA: ≤10
Odor	Paint-thinner-like odor detectable at 12 ppm
Exposure Limit	TLV-TWA 10 ppm (～32 mg/m3) (ACGIHand OSHA); ceiling 25 ppm (～80 mg/m3)(OSHA and MSHA); peak 50 ppm (～160mg/m3)/10 min/8 h (OSHA); carcinogenicity:Suspected Human Carcinogen (ACGIH),Human Sufficient Ev
Maximum wavelength(λmax)	['λ: 280 nm Amax: 1.0', , 'λ: 290 nm Amax: 0.15', , 'λ: 300 nm Amax: 0.06', , 'λ: 330
Merck	14,1066
BRN	969212
pKa	43(at 25℃)
Storage Condition	room temp
Stability	Stable. Substances to be avoided include strong oxidizing agents, sulfuric acid, nitric acid, halogens. Highly flammable.
Explosive Limit	1.4-8.0%(V)
Refractive Index	n20/D 1.501(lit.)
Physical and Chemical Properties	Molecular Weight: 78.11 Melting Point: 5.51 ℃ Boiling Point: 80.1 ℃ liquid density (20 ℃): 879.4/m3 gas density: 2.770/m3 relative density (38 ℃, Air = 1): 1.4 heat of gasification (25 ℃): 443.62kJ/kg (80.1 ℃) critical temperature: 394.02 ℃ critical pressure: 4898kPa critical density: 302kg/m3 specific heat capacity (gas, 90 ℃,101.325kPa): 288.94 kJ/kg cp = 1361.96kJ/(kg.K) Cv = 1238.07kJ/(kg.K) (liquid, 5 °c): 1628.665kJ/(kg.K) (liquid, 20 °c): 1699.841kJ/(kg.K) Specific heat ratio: (gas, 90 ℃,101.325kPa): Cp/Cv = 1.10 vapor pressure (26.1 ℃): 13.33kPa viscosity (20 ℃): 0.647MPA. s surface tension (contact with air, 0 ℃): 31.6mN/m thermal conductivity (12 ℃, liquid): 0.13942W/(m.K) (0 °c, liquid,): 0.0087671W/(m.K) refractive index (20 ℃): nD = 14462 flash point: -11 ℃ ignition point: 562.2 ℃ explosion limit: 1.3%-7.1% maximum explosion pressure: 9kg/cm2 concentration of maximum explosion pressure: 3.9% most easily ignitable concentration: 5% combustion heat (liquid, 25 ℃): 3269.7KJ/mol toxicity level: 2 flammability level: 3 explosivity level: 0benzene is a colorless transparent volatile liquid with aromatic odor at normal temperature and pressure. Can release toxic vapor. Benzene is a compound that is not easy to decompose. When it reacts with other chemical substances, its basic structure is unchanged, only the hydrogen atom in the benzene ring is replaced by other groups. The vapor of benzene can form an explosive mixture with air. Liquid Benzene is lighter than water, but its vapor is heavier than air. It is very easy to cause combustion and explosion in the face of high heat or open fire. Benzene vapor can diffuse far, meet the ignition source on the ignition, and the flame along the flow back. Benzene is prone to the generation and accumulation of static electricity. The reaction of benzene in contact with oxidant is intense. Benzene is insoluble in water, but soluble in alcohol, ether, acetone, chloroform, gasoline, carbon disulfide and other organic solvents.
Use	Basic chemical raw materials, used as solvents and synthetic benzene derivatives, spices, dyes, plastics, pharmaceuticals, explosives, rubber, etc.

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Product Detail

Product Tags

Risk Codes	R45 – May cause cancer R46 – May cause heritable genetic damage R11 – Highly Flammable R36/38 – Irritating to eyes and skin. R48/23/24/25 - R65 – Harmful: May cause lung damage if swallowed R39/23/24/25 - R23/24/25 – Toxic by inhalation, in contact with skin and if swallowed.
Safety Description	S53 – Avoid exposure – obtain special instructions before use. S45 – In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37 – Wear suitable protective clothing and gloves. S16 – Keep away from sources of ignition. S7 – Keep container tightly closed.
UN IDs	UN 1114 3/PG 2
WGK Germany	3
RTECS	CY1400000
FLUKA BRAND F CODES	3-10
TSCA	Yes
HS Code	2902 20 00
Hazard Class	3
Packing Group	II
Toxicity	LD50 orally in young adult rats: 3.8 ml/kg (Kimura)

Introduction

Benzene is a colorless and transparent liquid with a special aromatic odor. The following is an introduction to the properties, uses, preparation methods and safety information of benzene:

Quality:

1. Benzene is highly volatile and flammable, and can form an explosive mixture with oxygen in the air.

2. It is an organic solvent that can dissolve many organic matter, but is insoluble in water.

3. Benzene is a conjugated aromatic compound with a stable chemical structure.

4. The chemical properties of benzene are stable and not easy to be attacked by acid or alkali.

Use:

1. Benzene is widely used as an industrial raw material for the manufacture of plastics, rubber, dyes, synthetic fibers, etc.

2. It is an important derivative in petrochemical industry, used to manufacture phenol, benzoic acid, aniline and other compounds.

3. Benzene is also commonly used as a solvent for organic synthesis reactions.

Method:

1. It is obtained as a by-product in the refining process of petroleum.

2. It is obtained by the dehydration reaction of phenol or the cracking of coal tar.

Safety Information:

1. Benzene is a toxic substance, and long-term exposure to or inhalation of high concentrations of benzene vapor will cause serious health risks to the human body, including carcinogenicity.

2. When using benzene, it is necessary to maintain good ventilation conditions to ensure that the operation is carried out in an appropriate environment.

3. Avoid skin contact and inhalation of benzene vapor, and wear personal protective equipment such as protective gloves and respirators.

4. Eating or drinking benzene-containing substances will lead to poisoning, and safety operating procedures should be strictly observed.

5. Waste benzene and the waste involved in benzene should be disposed of in accordance with appropriate laws and regulations to avoid environmental pollution and harm.

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71-43-2