Azine
Azabenzene
C5H5N
Molecular mass: 79.1
ICSC # 0323
CAS # 110-86-1
RTECS # UR8400000
UN # 1282
EC # 613-002-00-7
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Highly flammable.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames, NO sparks, and NO smoking.
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Powder, alcohol-resistant foam, water in large amounts, carbon dioxide.
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Explosion
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Vapour/air mixtures are explosive.
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Closed system, ventilation, explosion-proof electrical equipment and lighting.
Do NOT use compressed air for filling, discharging, or handling.
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In case of fire: keep drums, etc., cool by spraying with water.
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Exposure
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•Inhalation
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Cough.
Dizziness.
Headache.
Nausea.
Shortness of breath.
Unconsciousness.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Artificial respiration if indicated.
Refer for medical attention.
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•Skin
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MAY BE ABSORBED!
Redness.
Burning sensation
(further see Inhalation).
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
Refer for medical attention.
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•Eyes
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Redness.
Pain.
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Safety spectacles.
or face shield.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Abdominal pain.
Diarrhoea.
Vomiting.
Weakness
(further see Inhalation).
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Do NOT induce vomiting.
Give one or two glasses of water to drink.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Remove all ignition sources.
Collect leaking and spilled liquid in sealable containers as far as possible.
Absorb remaining liquid in sand or inert absorbent and remove to safe place.
Do NOT wash away into sewer.
(Extra personal protection: self-contained breathing apparatus).
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Fireproof.
Separated from
strong oxidants,
strong acids.
Cool.
Dry.
Well closed.
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F symbol
Xn symbol
R: 11-20/21/22
S: 2-26-28
UN Hazard Class: 3
UN Packing Group: II
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Important Data
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Physical State; Appearance:
COLOURLESS
LIQUID
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
The vapour is heavier than air
and may travel along the ground; distant ignition possible.
Chemical Dangers:
The substance decomposes
on burning
producing
toxic fumes
(
nitrogen oxides
and
hydrogen cyanide
- see
ICSC # 0492).
The substance is a weak base.
Reacts
violently with
strong oxidants
and
strong acids
.
Occupational Exposure Limits:
TLV: 1 ppm
(as TWA)
A3 (confirmed animal carcinogen with unknown relevance to humans); (ACGIH 2005).
MAK: 5 ppm, 16 mg/m3
Peak limitation category: II(2)
(DFG 2005).
OSHA PEL: TWA 5 ppm (15 mg/m3)
NIOSH REL: TWA 5 ppm (15 mg/m3)
NIOSH IDLH: 1000 ppm See: 110861
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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 rather quickly on evaporation of this substance at 20°C.
Effects of Short-Term Exposure:
The substance
irritates
the eyes,
the skin and
the respiratory tract.
The substance may cause effects on the central nervous system and gastrointestinal tract.
Exposure far above the OEL could cause lowering of consciousness.
Effects of Long-Term or Repeated Exposure:
The substance may have effects on the
central nervous system
,
liver
,
kidneys
.
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Physical
Properties
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Boiling point: 115°C
Melting point: -42°C
Relative density (water = 1): 0.98
Solubility in water:
miscible
Vapour pressure, kPa at 20°C: 2.0
Relative vapour density (air = 1): 2.73
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Relative density of the vapour/air-mixture at 20°C (air = 1): 1.03
Flash point:
20°C c.c.
Auto-ignition temperature: 482°C
Explosive limits, vol% in air: 1.8-12.4
Octanol/water partition coefficient as log Pow: 0.65
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Environmental
Data
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The substance is harmful to aquatic organisms.
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N O T E S
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Pyridine can normally be detected by odour at levels well below the TLV. However, perception of the odour may decline quickly.
Depending on the degree of exposure, periodic medical examination is indicated.
Transport Emergency Card: TEC (R)-98
NFPA Code: H 2; F 3; R 0;
Card has been partially updated in January 2008: see Ingestion First Aid.
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ADDITIONAL INFORMATION
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ICSC: 0323
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PYRIDINE
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(C) IPCS, CEC, 1994
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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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