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Nitrogen Dioxide (NO2)

Health Effects
Nitrogen dioxide is an irritant, especially to the respiratory system. Exposure can result in delayed formation of lung edema even at low concentrations. Concentrations >4 ppm will anesthetize the nose, thus creating a potential for overexposure.
RTECS Description:   Tumorigen, Mutagen, Reproductive Effector
Carcinogenicity:          IARC/NTC Not listed as carcinogenic.

Exposure Limits:
ACGIH:          TLV =             3 ppm
NIOSH           STEL =           1 ppm
IDLH =           20 ppm
OSHA:            PEL                 Ceiling 5 ppm (29 CFR 1910.1000 Table Z-1)

Steri-Trac® NO2 Monitor
Availability:                            Special Order
Range:                         0 – 20 % v/v
Resolution:                  0.1 % v/v
Temp Range:               -20 to +50 oC
Response time (t90):     <40 s

Properties and Applications:
Nitrogen dioxide constitutes one of the components of the common pollutant NOx gases. Nitrogen dioxide is used in the nitration of organic compounds, especially in the manufacture of explosives and has been used to bleach flour. Forms equilibrium mixture with colorless dintrogen tetroxide.

Physical Properties:
Chemical Formula:      NO2
Physical form:             red/brown gas
MP:                             -9.3 oC
BP:                              21.2 oC
MW:                            46.0 g/mol
Rel. Gas Density:        1.6 (Air = 1)
Reaction with water:   Forms acids
Odor threshold            0.2 ppm

Classification Numbers:
CAS No.:                    10102-44-0
EC No.:                       233-272-6
RTECS:                       QW9800000


*Specifications subject to change



















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