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AMMONIUM HYDROXIDE (10%-35% solution) ICSC: 0215
Date of peer-review: March 1995

Aqua ammonia
Ammonium hydrate
CAS # 1336-21-6 NH4OH
RTECS # BQ9625000 Molecular mass: 35.1
UN # 2672
EC # 007-001-01-2
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Not combustible.

In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION See Notes.

In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
STRICT HYGIENE!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Burning sensation. Cough. Laboured breathing. Shortness of breath. Sore throat.
Ventilation, local exhaust, or breathing protection. Keep containers properly closed.
Fresh air, rest. Artificial respiration if indicated. Refer for medical attention.
Skin Corrosive. Redness. Serious skin burns. Pain. Blisters.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
Eyes Corrosive. Redness. Pain. Blurred vision. Severe deep burns.
Face shield 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 Corrosive. Abdominal cramps. Abdominal pain. Sore throat. Vomiting (further see Inhalation).
Do not eat, drink, or smoke during work.
Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert in case of a large spillage! Ventilation. Cautiously neutralize spilled liquid with a dilute acid, such as dilute sulfuric acid. Wash away remainder with plenty of water. Do NOT let this chemical enter the environment (extra personal protection: complete protective clothing including self-contained breathing apparatus).
Unbreakable packaging; put breakable packaging into closed unbreakable container.
EU Classification
Symbol: C
R: 34-37
S: (1/2-)7-26-45
Note: B
UN Classification
UN Hazard Class: 8
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-219 NFPA Code: H3; F1; R0
Separated from food and feedstuffs (see Chemical Dangers). Cool. Well closed. Keep in a well-ventilated room (further see Notes).
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 2001

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AMMONIUM HYDROXIDE (10%-35% solution) ICSC: 0215
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
VERY VOLATILE, COLOURLESS SOLUTION OF AMMONIA IN WATER , WITH PUNGENT ODOUR.

CHEMICAL DANGERS:
Reacts with many heavy metals and their salts forming explosive compounds. Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC # 0001). The solution in water is a strong base, it reacts violently with acids.

OCCUPATIONAL EXPOSURE LIMITS:
TLV (as TWA): 25 ppm; 17 mg/m^3 (for NH_3); as STEL: 35 ppm; 24 mg/m^3 (ACGIH 1994-1995. TLV not established.
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour or aerosol and by ingestion.

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

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion as well. Inhalation of high concentrations of vapour may cause laryngeal oedema, inflamation of the respiratory tract, and pneumonia. The effects may be delayed.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Lungs may be affected by repeated or prolonged exposure to the vapour or aerosol.
PHYSICAL PROPERTIES
Boiling point: (25%) 38C
Melting point: (25%) -58C
Relative density (water = 1): (25%) 0.9
Solubility in water: miscible
Vapour pressure, kPa at 20C: (25%) 48
Relative vapour density (air = 1): 0.6-1.2
ENVIRONMENTAL DATA
The substance is very toxic to aquatic organisms.
NOTES
Ammonia vapour is flammable and explosive under certain conditions. Be aware that ammonia gas can evolve from ammonia solution. Depending on the degree of exposure, periodic medical examination is indicated. Do NOT completely fill bottles with the substance; strong solutions may develop pressure. Release caps with care. Other UN numbers are: UN 1005 Ammonia, anhydrous liquefied or ammonia solutions, relative density of less than 0.880 at 15C in water, with more than 50% ammonia; UN 2073 Ammonia, 35-50%. Also consult ICSC # 0414 Ammonia.
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 2001

See Also:
        Ammonium hydroxide (CHEMINFO)