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International Chemical Safety Cards
HYDROGEN CYANIDE, LIQUEFIED ICSC: 0492
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PHYSICAL STATE; APPEARANCE:
COLOURLESS GAS OR LIQUID , WITH CHARACTERISTIC ODOUR.
PHYSICAL DANGERS:
The gas mixes well with air, explosive mixtures are easily formed.
CHEMICAL DANGERS:
The substance may polymerize due to warming, under the influence of base(s), over 2% water, or temperatures above 184°C, or if not chemically stabilized, with fire or explosion hazard. On combustion, forms toxic and corrosive gases, including nitrogen oxides. The solution in water is a weak acid. Reacts violently with oxidants, hydrogen chloride in alcoholic mixtures, causing fire and explosion hazard.
OCCUPATIONAL EXPOSURE LIMITS:
TLV: 4.7 ppm; 5 mg/m3 (ceiling values) (skin) (ACGIH 1997).
OSHA PEL: TWA 10 ppm (11 mg/m3) skin
NIOSH REL: ST 4.7 ppm (5 mg/m3) skin
NIOSH IDLH: 50 ppm
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin 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 irritates the eyes and the respiratory tract. The substance may cause effects on the central nervous system , resulting in impaired respiratory and circulatory functions. Exposure may result in death. See Notes.
EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
PHYSICAL
PROPERTIES
Boiling point: 26°C
Melting point: -13°C
Relative density (water = 1): 0.69
Solubility in water: miscible
Vapour pressure, kPa at 20°C: 82.6
Relative vapour density (air = 1): 0.94
Flash point: -18°C c.c.
Auto-ignition temperature: 538°C
Explosive limits, vol% in air: 5.6-40.0
Octanol/water partition coefficient as log Pow: 0.35
ENVIRONMENTAL
DATA
The substance is very toxic to aquatic organisms.
N O T E S
Mineral acids are commonly used as stabilizers. The occupational exposure limit value should not be exceeded during any part of the working exposure. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. The odour warning when the exposure limit value is exceeded is insufficient. The recommendations on this Card also apply to hydrogen cyanide, stabilized, absorbed in a porous inert material. Another UN number: 1614, hydrogen cyanide stabilized, absorbed in a porous inert material. Transport Emergency Card: TEC (R)-61G60
NFPA Code: H4; F4; R2;
ADDITIONAL INFORMATION
ICSC: 0492 HYDROGEN CYANIDE, LIQUEFIED
(C) IPCS, CEC, 1999
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.
HYDROGEN CYANIDE, LIQUEFIED ICSC: 0492
I
M
P
O
R
T
A
N
T
D
A
T
A
PHYSICAL STATE; APPEARANCE:
COLOURLESS GAS OR LIQUID , WITH CHARACTERISTIC ODOUR.
PHYSICAL DANGERS:
The gas mixes well with air, explosive mixtures are easily formed.
CHEMICAL DANGERS:
The substance may polymerize due to warming, under the influence of base(s), over 2% water, or temperatures above 184°C, or if not chemically stabilized, with fire or explosion hazard. On combustion, forms toxic and corrosive gases, including nitrogen oxides. The solution in water is a weak acid. Reacts violently with oxidants, hydrogen chloride in alcoholic mixtures, causing fire and explosion hazard.
OCCUPATIONAL EXPOSURE LIMITS:
TLV: 4.7 ppm; 5 mg/m3 (ceiling values) (skin) (ACGIH 1997).
OSHA PEL: TWA 10 ppm (11 mg/m3) skin
NIOSH REL: ST 4.7 ppm (5 mg/m3) skin
NIOSH IDLH: 50 ppm
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin 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 irritates the eyes and the respiratory tract. The substance may cause effects on the central nervous system , resulting in impaired respiratory and circulatory functions. Exposure may result in death. See Notes.
EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
PHYSICAL
PROPERTIES
Boiling point: 26°C
Melting point: -13°C
Relative density (water = 1): 0.69
Solubility in water: miscible
Vapour pressure, kPa at 20°C: 82.6
Relative vapour density (air = 1): 0.94
Flash point: -18°C c.c.
Auto-ignition temperature: 538°C
Explosive limits, vol% in air: 5.6-40.0
Octanol/water partition coefficient as log Pow: 0.35
ENVIRONMENTAL
DATA
The substance is very toxic to aquatic organisms.
N O T E S
Mineral acids are commonly used as stabilizers. The occupational exposure limit value should not be exceeded during any part of the working exposure. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. The odour warning when the exposure limit value is exceeded is insufficient. The recommendations on this Card also apply to hydrogen cyanide, stabilized, absorbed in a porous inert material. Another UN number: 1614, hydrogen cyanide stabilized, absorbed in a porous inert material. Transport Emergency Card: TEC (R)-61G60
NFPA Code: H4; F4; R2;
ADDITIONAL INFORMATION
ICSC: 0492 HYDROGEN CYANIDE, LIQUEFIED
(C) IPCS, CEC, 1999
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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