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NIOSH

NITRIC ACID

ICSC: 0183

Concentrated Nitric Acid (70%)
HNO3
Molecular mass: 63.0
ICSC # 0183 		CAS # 7697-37-2
RTECS # QU5775000
UN # 2031
EC # 007-004-00-1
October 10, 2006 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Not combustible but enhances combustion of other substances. Gives off irritating or toxic fumes (or gases) in a fire. Heating will cause rise in pressure with risk of bursting.
NO contact with flammable substances. NO contact with combustibles or organic chemicals.
In case of fire in the surroundings: NO foam .
EXPLOSION Risk of fire and explosion on contact with many common organic compounds.

In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
•INHALATION Burning sensation. Cough. Laboured breathing. Shortness of breath. Sore throat. Symptoms may be delayed (see Notes).
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer immediately for medical attention.
•SKIN Serious skin burns. Pain. Yellow discolouration.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
•EYES Redness. Pain. Burns .
Face shield or eye protection in combination with breathing protection.
First rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention.
•INGESTION Sore throat. Abdominal pain. Burning sensation in the throat and chest. Shock or collapse. Vomiting. corrosive; 20109000
Do not eat, drink, or smoke during work.
Do NOT induce vomiting. Give one or two glasses of water to drink. Rest. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Ventilation. Collect leaking liquid in sealable containers. Cautiously neutralize remainder with sodium carbonate. Then wash away with plenty of water. Do NOT absorb in saw-dust or other combustible absorbents.
Separated from combustible and reducing substances,bases, organics food and feedstuffs. Cool. Dry. Keep in a well-ventilated room.
Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
Note: B
O symbol
C symbol
R: 8-35
S: 1/2-23-26-36-45
UN Hazard Class: 8
UN Subsidiary Risks: 5.1
UN Packing Group: I
Signal: Danger
Corr-Skull-Health haz
May be corrosive to metals
Fatal if swallowed
Causes severe skin burns and eye damage
Causes damage to respiratory tract if inhaled
Causes damage to digestive tract if swallowed
Causes damage to respiratory tract and teeth through prolonged or repeated exposure if inhaled
ICSC: 0183 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.

NITRIC ACID

ICSC: 0183

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PHYSICAL STATE; APPEARANCE:
COLOURLESS TO YELLOW LIQUID , WITH PUNGENT ODOUR.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on warming producing nitrogen oxides. The substance is a strong oxidant and reacts violently with combustible and reducing materials, e.g., turpentine, charcoal, alcohol. The substance is a strong acid, it reacts violently with bases and is corrosive to metals .

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 2 ppm as TWA, 4 ppm as STEL; (ACGIH 2006).
MAK: IIb (not established but data is available) (DFG 2008).
OSHA PEL†: TWA 2 ppm (5 mg/m3)
NIOSH REL: TWA 2 ppm (5 mg/m3) ST 4 ppm (10 mg/m3)
NIOSH IDLH: 25 ppm See: 7697372


ROUTES OF EXPOSURE:
Serious local effects by all routes of exposure.

INHALATION RISK:
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. Inhalation may cause lung oedema (see Notes). The effects may be delayed (See Notes).

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Lungs may be affected by repeated or prolonged exposure to the vapour. The substance may have effects on the teeth , resulting in teeth erosion.

PHYSICAL
PROPERTIES

Boiling point: 121°C
Melting point: -41.6°C
Relative density (water = 1): 1.4
Solubility in water: miscible
Vapour pressure, kPa at 20°C: 6.4
Relative vapour density (air = 1): 2.2
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.07
Octanol/water partition coefficient as log Pow: -0.21

ENVIRONMENTAL
DATA


N O T E S

Depending on the degree of exposure, periodic medical examination is suggested. The symptoms of lung oedema do not become manifest until a few hours or even a few days have passed and they are aggravated by physical effort.
Transport Emergency Card: TEC (R)-80S2031-I
NFPA Code: H 4; F 0; R 0; OX

ADDITIONAL INFORMATION



ICSC: 0183 NITRIC ACID
(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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