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Basic Information
CAS No.: 10102-44-0
Name: Nitrogen dioxide
Article Data: 1044
Molecular Structure:
Molecular Structure of 10102-44-0 (Nitrogen dioxide)
Formula: NO2
Molecular Weight: 46.0055
Synonyms: Nitriteradical;Nitrito;Nitro;Nitrogen dioxide;Nitrogen dioxide (NO2);Nitrogenperoxide;
EINECS: Einecs
Density: 2.62 g/mL at 25 °C
Melting Point: -11 °C
Boiling Point: 21 °C
Flash Point: < 20°C
Solubility: Hydrolyses
Appearance: COLOURLESS SOLID, BROWN LIQUID OR RED-BROWN GAS
Hazard Symbols: Inhalation may be fatal. Can react strongly with reducing materials. TLV: 3 ppm; STEL 5 ppm; not classifiable as a human carcinogen.
Risk Codes: 26-34
Safety: Experimental poison by inhalation. Moderately toxic to humans by inhalation. An experimental teratogen. Other experimental reproductive effects. Human systemic effects by inhalation: pulmonary vascular resistance changes, cough, dyspnea, and other pulmonary changes. Mutation data reported. Violent reaction with cyclohexane, F2, formaldehyde, alcohols, nitrobenzene, petroleum, toluene. When heated to decomposition it emits toxic fumes of NOx. See also NITRIC OXIDE.

Analytical Methods:

   

For occupational chemical analysis use OSHA: #ID-109 or NIOSH: Nitrogen Dioxide, 6700.

Transport Information: UN 1067
PSA: 34.14000
LogP: -0.41360
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Chemistry

Product Name: Nitrogen dioxide (CAS NO.10102-44-0)


Molecular Formula: NO2
Molecular Weight: 46.01g/mol
Mol File: 10102-44-0.mol
Einecs: 233-272-6
Melting Point: -11 °C(lit.)
Boiling point: 21 °C(lit.)
Flash Point:  < 20°C
Density: 2.62 g/mL at 25 °C(lit.)
Vapor density: 1.58 (21 °C, vs air)
Vapor pressure: 14.33 psi ( 20 °C)
Product Categories: Inorganics
Synonyms of Nitrogen dioxide (CAS NO.10102-44-0): Azote ; NA 1067 ; Nitrito ; Nitro ; Nitrogen oxide ; Nitrous gas or air ; Oxoazane oxide .

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
dog LCLo inhalation 123mg/m3/8H (123mg/m3) SENSE ORGANS AND SPECIAL SENSES: OTHER CHANGES: OLFACTION

SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE
Toxicology and Applied Pharmacology. Vol. 9, Pg. 160, 1966.
guinea pig LC50 inhalation 30ppm/1H (30ppm) LUNGS, THORAX, OR RESPIRATION: CHRONIC PULMONARY EDEMA

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY STIMULATION

BLOOD: METHEMOGLOBINEMIA-CARBOXYHEMOGLOBIN
Archives of Environmental Health. Vol. 10, Pg. 220, 1965.
human LCLo inhalation 200ppm/1M (200ppm)   Annals of Occupational Hygiene. Vol. 17, Pg. 159, 1974.
man TCLo inhalation 2ppm/4H (2ppm) LUNGS, THORAX, OR RESPIRATION: STRUCTURAL OR FUNCTIONAL CHANGE IN TRACHEA OR BRONCHI

LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES
Inhalation Toxicology. Vol. 11, Pg. 89, 1999.
man TCLo inhalation 6200ppb/10M (6.2ppm) LUNGS, THORAX, OR RESPIRATION: CHANGES IN PULMONARY VASCULAR RESISTANCE Koshu Eiseiin Kenkyu Hokoku. Bulletin of the Institute of Public Health. Vol. 17, Pg. 337, 1968.
man TCLo inhalation 90ppm/40M (90ppm) LUNGS, THORAX, OR RESPIRATION: COUGH

LUNGS, THORAX, OR RESPIRATION: DYSPNEA

LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES
Journal of Occupational Medicine. Vol. 8, Pg. 301, 1966.
monkey LCLo inhalation 123mg/m3/8H (123mg/m3) SENSE ORGANS AND SPECIAL SENSES: OTHER CHANGES: OLFACTION

SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE
Toxicology and Applied Pharmacology. Vol. 9, Pg. 160, 1966.
mouse LC50 inhalation 1000ppm/10M (1000ppm) BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD

BEHAVIORAL: CHANGES IN MOTOR ACTIVITY (SPECIFIC ASSAY)
Journal of Combustion Toxicology. Vol. 4, Pg. 246, 1977.
rabbit LC50 inhalation 315ppm/15M (315ppm) LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION

SENSE ORGANS AND SPECIAL SENSES: CONJUNCTIVE IRRITATION: EYE
American Industrial Hygiene Association Journal. Vol. 23, Pg. 457, 1962.
rat LC50 inhalation 88ppm/4H (88ppm)   AMA Archives of Industrial Hygiene and Occupational Medicine. Vol. 10, Pg. 418, 1954.

Consensus Reports

EPA Extremely Hazardous Substances List. Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

Safety Profile

Experimental poison by inhalation. Moderately toxic to humans by inhalation. An experimental teratogen. Other experimental reproductive effects. Human systemic effects by inhalation: pulmonary vascular resistance changes, cough, dyspnea, and other pulmonary changes. Mutation data reported. Violent reaction with cyclohexane, F2, formaldehyde, alcohols, nitrobenzene, petroleum, toluene. When heated to decomposition it emits toxic fumes of NOx. See also NITRIC OXIDE.
Analytical Methods:
For occupational chemical analysis use OSHA: #ID-109 or NIOSH: Nitrogen Dioxide, 6700.
evere exposures may be fatal. Contact may cause burns to skin and eyes. Contact with liquid may cause frostbite. NITROGEN DIOXIDE was reported to react with blood to form methemoglobin. The lowest lethal human inhalation dose has been reported at 200 ppm/1 min.
Safety Information of Nitrogen dioxide (CAS NO.10102-44-0):
Hazard Codes: T+
Risk Statements: 26-34
26:  Very Toxic by inhalation
34:  Causes burns 
Safety Statements: 9-26-28-36/37/39-45
9:  Keep container in a well-ventilated place
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
28:  After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer)
36:  Wear suitable protective clothing 
37:  Wear suitable gloves 
39:  Wear eye/face protection
45:  In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)

Standards and Recommendations

OSHA PEL: STEL 1 ppm
ACGIH TLV: TWA 3 ppm; STEL 5 ppm; Not Classifiable as a Human Carcinogen
DFG MAK: 5 ppm (9 mg/m3)
NIOSH REL: CL (Oxides of Nitrogen) 1 ppm/15M

Analytical Methods

For occupational chemical analysis use OSHA: #ID-109 or NIOSH: Nitrogen Dioxide, 6700.

Specification

  Nitrogen dioxide (CAS NO.10102-44-0) is a reddish brown gas or yellowish-brown liquid when cooled or compressed. Shipped as a liquefied gas under own vapor pressure. Vapors are heavier than air. Toxic by inhalation (vapor) and skin absorption. Noncombustible, but accelerates the burning of combustible materials. Cylinders and ton containers may not be equipped with a safety relief device.