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ChemicalBook >> CAS DataBase List >>NITROGEN DIOXIDE

NITROGEN DIOXIDE suppliers

NITROGEN DIOXIDE

CAS:
10102-44-0
MF:
NO2*
MW:
46.01

Properties

Melting point:
−11 °C(lit.)
Boiling point:
21 °C(lit.)
Density 
2.62 g/mL at 25 °C(lit.)
vapor density 
1.58 (21 °C, vs air)
vapor pressure 
14.33 psi ( 20 °C)
solubility 
reacts with H2O
form 
brown gas
color 
brown gas; equil with NO 4
Odor
Pungent, acrid odor detectable at 0.12 ppm
Odor Threshold
0.12ppm
Water Solubility 
decomposes in H2O to HNO3 and releases NO; soluble conc H2SO4, HNO3 [MER06]
Exposure limits
TLV-TWA 3 ppm (~6 mg/m3) (ACGIH), ceiling in air 5 ppm (MSHA and OSHA); STEL 5 ppm (ACGIH); IDLH 50 ppm (NIOSH).

Safety Information

Symbol(GHS) 
GHS hazard pictogramsGHS hazard pictogramsGHS hazard pictogramsGHS hazard pictograms
GHS03,GHS04,GHS05,GHS06
Signal word 
Danger
Hazard statements 
H270-H314-H330-H412
Precautionary statements 
P220-P244-P260-P280-P304+P340+P310-P305+P351+P338
Hazard Codes 
T+,O
Risk Statements 
26-34-8
Safety Statements 
9-26-28-36/37/39-45
RIDADR 
UN 1067 2.3
WGK Germany 
1
RTECS 
QX1575000
DOT Classification
2.3, Hazard Zone A (Gas poisonous by inhalation)
HazardClass 
2.3
HS Code 
28112900
Toxicity
LC50 inhal (rat)
88 ppm (4 h)
PEL (OSHA)
5 ppm (9 mg/m3; ceiling)
TLV-TWA (ACGIH)
3 ppm (5.6 mg/m3)
STEL (ACGIH)
5 ppm (9.4 mg/m3)
IDLA
13 ppm

Use

Nitrogen dioxide is an intermediate in producing nitric acid. It also is used in the lead chamber process for making sulfuric acid. It is used as a nitrating and oxidizing agent, in rocket fuels, in the manufacture of hemostatic cotton and other oxidized cellulose compounds, and in bleaching flour. Nitrogen dioxide occurs in trace concentrations in the atmosphere due to oxidation of nitric oxide in air. It also is found in exhaust gases of internal combustion engines, in industrial waste gases from plants using nitric acid, and in cigarette smoke. Brown color of smog in many industrial urban areas is attributed to nitrogen dioxide.

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