Nitrous oxide
Properties
of nitrous oxide is described
below PHYSICAL STATE;
APPEARANCE:
COLOURLESS COMPRESSED LIQUEFIED GAS , WITH CHARACTERISTIC ODOUR.
PHYSICAL DANGERS:
The gas is heavier than air and may accumulate in low ceiling spaces
causing deficiency of oxygen.
CHEMICAL DANGERS:
Reacts violently with sulphurous anhydride, amorphous boron,
phosphine, ethers, aluminium, hydrazine, phenyl-lithium and tungsten
carbide causing fire and explosion hazard. The gas is a strong oxidant
above 300°C and may form explosive mixtures with ammonia, carbon
monoxide, hydrogen sulphide, oil, grease and fuels.
OCCUPATIONAL EXPOSURE LIMITS:
TLV: 50 ppm as TWA; A4; (ACGIH 2003).
MAC: 100 ppm, 180 mg/m³; (DFG 2002).
OSHA PEL: none
NIOSH REL: TWA 25 ppm (46 mg/m3) (TWA over the time exposed)
*Note: REL for exposure to waste anesthetic gas.
NIOSH IDLH: No data
ROUTES OF EXPOSURE:
The substance can be
absorbed into the body by inhalation.
INHALATION RISK:
A harmful concentration of this gas in the air will be reached very
quickly on loss of containment.
EFFECTS OF SHORT-TERM EXPOSURE:
The liquid may cause frostbite. The substance may cause effects on
the central nervous system , resulting in lowering of consciousness .
EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The substance may have effects on the bone marrow and the peripheral
nervous system . May cause reproductive toxicity in humans.
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For more information see website:
http://www.cdc.gov/niosh/ipcsneng/neng0067.html
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