INTOX Home Page
NITROGEN DIOXIDE ICSC: 0930
Date of Peer Review: May 2003

Nitrogen peroxide
(cylinder)
CAS # 10102-44-0 NO2
RTECS # QW9800000 Molecular mass: 46.01
UN # 1067
EC # 007-002-00-0
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Not combustible but enhances combustion of other substances.
NO contact with combustibles.
In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION

In case of fire: keep cylinder cool by spraying with water.
EXPOSURE
STRICT HYGIENE!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Burning sensation. Sore throat. Cough. Dizziness. Headache. Sweating. Laboured breathing. Nausea. Vomiting. Shortness of breath. Weakness. Symptoms may be delayed (see Notes).
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
Skin Redness. Pain. Skin burns.
Protective gloves. Protective clothing.
First rinse with plenty of water, then remove contaminated clothes and rinse again. Refer for medical attention.
Eyes Redness. Pain. Severe deep burns.
Safety goggles, or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Ventilation. Do NOT absorb in saw-dust or other combustible absorbents. Remove vapour with fine water spray. Neutralize used water with chalk or soda. Gas-tight chemical protection suit including self-contained breathing apparatus.
EU Classification
Symbol: T+
R: 26-34
S: (1/2-)-9-26-28-36/37/39-45
Note: [5]
UN Classification
UN Hazard Class: 2.3
UN Subsidiary Risks: 5.1 and 8

EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-20S1067
NFPA Code: H3; F0; R0; OX
Ventilation along the floor.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 1999

SEE IMPORTANT INFORMATION ON BACK


NITROGEN DIOXIDE ICSC: 0930
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
REDDISH-BROWN GAS OR BROWN OR YELLOW LIQUID, WITH PUNGENT ODOUR.

PHYSICAL DANGERS:
The gas is heavier than air.

CHEMICAL DANGERS:
The substance is a strong oxidant and reacts violently with combustible and reducing materials. Reacts with water to produce nitric acid and nitric oxide. Attacks many metals in the presence of water.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 3 ppm as TWA, 5 ppm as STEL, A4, (ACGIH 2003).
MAK: 5 ppm, 9.5 mg/m. Peak limitation category: I (DFG 2002).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:
On loss of containment, a harmful concentration of this gas in the air will be reached very quickly.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the skin and the respiratory tract. Inhalation of the gas or the vapor may cause lung oedema (see Notes). Exposure far above the OEL may result in death. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The substance may have effects on the immune system and lungs, resulting in decrease in resistance to infection. Animal tests show that this substance possibly causes toxic effects upon human reproduction.
PHYSICAL PROPERTIES
Boiling point: 21.2C
Melting point: -11.2C
Relative density (water = 1): 1.45 (liquid)
Solubility in water: reaction
Vapour pressure, kPa at 20C: 96
Relative vapour density (air = 1): 1.58
ENVIRONMENTAL DATA

NOTES
The commercial brown liquid under pressure is an equilibrium mixture of nitrogen dioxide and the colourless nitrogen tetroxide. Non irritant concentration may cause lung oedema. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered. Rinse contaminated clothes (fire hazard) with plenty of water. Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 1999
See Also:
        Nitrogen dioxide (CHEMINFO)
        Nitrogen dioxide (PIM 736)