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A6186512

Nitrobenzene Standard , StandardforGC,≥99.8%(GC) , 98-95-3

Synonym(s):
Nitrobenzene

CAS NO.:98-95-3

Empirical Formula: C6H5NO2

Molecular Weight: 123.11

MDL number: MFCD00007043

EINECS: 202-716-0

Update time: 2022-07-08

PRODUCT Properties

Melting point: 5-6 °C (lit.)
Boiling point: 210-211 °C (lit.)
Density  1.196 g/mL at 25 °C (lit.)
vapor density  4.2 (vs air)
vapor pressure  0.15 mm Hg ( 20 °C)
refractive index  n20/D 1.551(lit.)
Flash point: 190 °F
storage temp.  Store below +30°C.
solubility  1.90g/l
form  Liquid
pka 3.98(at 0℃)
color  Clear yellow
PH 8.1 (1g/l, H2O, 20℃)
Relative polarity 4.5
explosive limit 1.8-40%(V)
Water Solubility  slightly soluble
Merck  14,6588
BRN  507540
Henry's Law Constant 9.86 at 25 °C (thermodynamic method-GC/UV spectrophotometry, Altschuh et al., 1999)
Exposure limits TLV-TWA 1 ppm (~5 mg/m3) (ACGIH, MSHA, and OSHA); IDLH 200 ppm (NIOSH).
Dielectric constant 35.7(20℃)
Stability: Stable. Incompatible with strong oxidizing agents, strong reducing agents, strong bases. Flammable. Note wide explosion limits.
LogP 1.86 at 24.5℃ and pH7.9

Description and Uses

Nitrobenzene is a greenish-yellow crystal or yellow oily liquid, and is slightly soluble in water. The primary hazard of nitrobenzene is toxicity; however, it is also combustible. The boiling point is about 410°F, the flash point is 190°F, and the ignition temperature is 900°F. The specific gravity is 1.2, which is heavier than water, and the material will sink to the bottom. The vapor density is 4.3, which is heavier than air. Nitrobenzene is toxic by ingestion, inhalation, and skin absorption, with a TLV of 1 ppm in air. The four-digit UN identification number is 1652. The NFPA 704 designation is health 3, flammability 2, and reactivity 1. Nitrobenzene is a nitro hydrocarbon derivative, but it is not very explosive. The primary uses are as a solvent, an ingredient of metal polishes and shoe polishes, and in the manufacture of aniline.

Most nitrobenzene (97%) is used in the manufacture of aniline (IARC 1996, HSDB 2009). Miscellaneous uses include the manufacture of benzidine, quinoline, azobenzene, pyroxylin compounds, isocyanates, pesticides, rubber chemicals, pharmaceuticals, and dyes such as nigrosines and magenta. Nitrobenzene is found in soaps and shoe and metal polishes and is used as a solvent for cellulose ester, in modifying esterification of cellulose acetate, and in refining lubricating oils (HSDB 2009). Nitrobenzene also is used as a solvent in petroleum refining and the synthesis of other organic compounds, such as acetaminophen (ATSDR 1990).

Safety

Symbol(GHS) 
GHS06,GHS08
Signal word  Danger
Hazard statements  H301+H311+H331-H351-H360F-H372-H412
Precautionary statements  P202-P273-P280-P301+P310-P302+P352+P312-P304+P340+P311
Hazard Codes  T,N,F,Xn
Risk Statements  23/24/25-40-48/23/24-51/53-62-39/23/24/25-11-36/37/38-60-52/53-48/23/24/25-36-20/21/22
Safety Statements  28-36/37-45-61-28A-16-7-27-53-26
RIDADR  UN 1662 6.1/PG 2
OEB B
OEL TWA: 1 ppm (5 mg/m3) [skin]
WGK Germany  2
RTECS  DA6475000
Autoignition Temperature 899 °F
TSCA  Yes
HazardClass  6.1
PackingGroup  II
HS Code  29042010
Toxicity LD50 orally in rats: 600 mg/kg (PB91-108398)
IDLA 200 ppm

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