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NIOSH

NITROGEN DIOXIDE

ICSC: 0930

Nitrogen peroxide
NO2
Molecular mass: 46.01
(cylinder)
ICSC # 0930 		CAS # 10102-44-0
RTECS # QW9800000
UN # 1067
EC # 007-002-00-0
September 05, 2003 Validated

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

STORAGE

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.
Ventilation along the floor.

Note: 5
T+ symbol
R: 26-34
S: 1/2-9-26-28-36/37/39-45
UN Hazard Class: 2.3
UN Subsidiary Risks: 5.1 and 8
ICSC: 0930 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

NITROGEN DIOXIDE

ICSC: 0930

I

M

P

O

R

T

A

N

T


D

A

T

A

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 (not classifiable as a human carcinogen); (ACGIH 2008).
MAK:
Carcinogen category: 3B
(DFG 2008).
OSHA PEL†: C 5 ppm (9 mg/m3)
NIOSH REL: ST 1 ppm (1.8 mg/m3)
NIOSH IDLH: 20 ppm See: 10102440


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: 21.2°C
Melting point: -11.2°C
Relative density (water = 1): 1.45 (liquid)
Solubility in water:
reaction
Vapour pressure, kPa at 20°C: 96
Relative vapour density (air = 1): 1.58

ENVIRONMENTAL
DATA


N O T E S

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.
Transport Emergency Card: TEC (R)-20S1067

NFPA Code: H3; F0; R0; OX
Card has been partially updated in November 2008: see Occupational Exposure Limits.

ADDITIONAL INFORMATION



ICSC: 0930 NITROGEN DIOXIDE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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