AMMONIUM HYDROXIDE
Properties
of ammonium hydroxide is described
below
PHYSICAL STATE;
APPEARANCE:
VERY VOLATILE, COLOURLESS SOLUTION OF AMMONIA IN WATER , WITH
PUNGENT ODOUR.
PHYSICAL DANGERS:
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 NH3) 25 ppm as TWA; 40 ppm as
STEL; (ACGIH 2004).
MAC: 20 ppm, 14 mg/m³;
Peak limitation category: I(2); Pregnancy risk group: C;
(DFG 2004).
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 20°C.
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.
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units
For more information see website:
http://www.cdc.gov/niosh/ipcsneng/neng0215.html
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