1,3-Benzenedicarbonitrile
Isophthalodinitrile
m-Dicyanobenzene
C8H4N2
Molecular mass: 128.14
ICSC # 1583
CAS # 626-17-5
RTECS # CZ1900000
UN # 3276
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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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Combustible.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames.
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Powder, water spray, foam, carbon dioxide.
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Explosion
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Finely dispersed particles form explosive mixtures in air.
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Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.
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In case of fire: keep cylinder cool by spraying with water.
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Cough.
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Avoid inhalation of dust.
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Fresh air, rest.
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•Skin
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Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
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Safety goggles
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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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Diarrhoea.
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Do not eat, drink, or smoke during work.
Wash hands before eating.
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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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Personal protection: P1 filter respirator for inert particles.
Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
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Separated from strong oxidants, food and feedstuffs.
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Do not transport with food and feedstuffs.
UN Hazard Class: 6.1
UN Packing Group: III
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Important Data
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Physical State; Appearance:
COLOURLESS
TO WHITE
CRYSTALLINE POWDER
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
Dust explosion possible if in powder or granular form, mixed with air.
Chemical Dangers:
Reacts
with
strong oxidants
.
The substance decomposes
on heating
producing
toxic gases
including
hydrogen cyanide
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On combustion, forms nitrogen oxides.
Occupational Exposure Limits:
TLV: 5 mg/m3 as TWA; (ACGIH 2004).
MAK not established.
OSHA PEL: none
NIOSH REL: TWA 5 mg/m3
NIOSH IDLH: N.D. See: IDLH INDEX
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Routes of Exposure:
Inhalation Risk:
Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly when dispersed, especially if powdered.
Effects of Short-Term Exposure:
The substance
is irritating to the eyes.
Effects of Long-Term or Repeated Exposure:
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Physical
Properties
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Sublimation > 162°C
Density: 1.3
g/cm3
Solubility in water, g/100 ml at 20°C: 0.07
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Vapour pressure, Pa : 1.33
Relative vapour density (air = 1): 4.42
Flash point: >150°C
Octanol/water partition coefficient as log Pow: 0.39
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Environmental
Data
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N O T E S
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Health effects of exposure to the substance have not been investigated adequately.
Transport Emergency Card: TEC (R)-GT1-III
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ADDITIONAL INFORMATION
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ICSC: 1583
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iso-PHTHALONITRILE
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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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