Pyrocatechol
1,2-Benzenediol
1,2-Dihydroxybenzene
C6H6O2
Molecular mass: 110.1
ICSC # 0411
CAS # 120-80-9
RTECS # UX1050000
UN # 2811
EC # 604-016-00-4
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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.
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NO open flames.
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Water spray, powder.
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Explosion
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Burning sensation.
Cough.
Laboured breathing.
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Local exhaust or breathing protection.
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Fresh air, rest.
Artificial respiration may be needed.
Refer for medical attention.
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•Skin
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MAY BE ABSORBED!
Redness.
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse skin with plenty of water or shower.
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•Eyes
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Redness.
Pain.
Severe deep burns.
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Face shield
or
eye protection in combination with breathing protection.
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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.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
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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Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting,
then remove to safe place.
Do NOT let this chemical enter the environment.
Personal protection: P2 filter respirator for harmful particles.
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Separated from
strong oxidants,
food and feedstuffs
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Keep in the dark.
Ventilation along the floor.
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Do not transport with food and feedstuffs.
Xn symbol
R: 21/22-36/38
S: 2-22-26-37
UN Hazard Class: 6.1
UN Packing Group: III
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Important Data
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Physical State; Appearance:
COLOURLESS
CRYSTALS
, WITH CHARACTERISTIC ODOUR.
TURNS BROWN ON Exposure TO AIR AND LIGHT.
Physical Dangers:
Chemical Dangers:
On combustion, forms irritating fumes.
Reacts
with
oxidants
.
Occupational Exposure Limits:
TLV: 5 ppm as TWA; (skin); A3 (confirmed animal carcinogen with unknown relevance to humans); (ACGIH 2004).
MAK not established.
OSHA PEL: none
NIOSH REL: TWA 5 ppm (20 mg/m3) skin
NIOSH IDLH: N.D. See: IDLH INDEX
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its aerosol,
through the skin
and
by ingestion.
Inhalation Risk:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly.
Effects of Short-Term Exposure:
The substance
irritates
the skin, the respiratory tract and digestive tracts.
The substance
is corrosive to
the eyes.
The substance may cause effects on the
central nervous system
, resulting in depression,
convulsions
and
respiratory failure
.
Exposure could cause a rise of blood pressure.
Effects of Long-Term or Repeated Exposure:
Repeated or prolonged contact may cause skin sensitization.
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Physical
Properties
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Boiling point: 245.5°C
Melting point: 105°C
Relative density (water = 1): 1.3
Solubility in water, g/100 ml: 43
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Relative vapour density (air = 1): 3.8
Flash point: 127°C c.c.
Auto-ignition temperature: 510°C
Octanol/water partition coefficient as log Pow: 0.88
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Environmental
Data
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The substance is toxic to aquatic organisms.
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N O T E S
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Card has been partly updated in October 2005. See sections Occupational Exposure Limits, Emergency Response.
Transport Emergency Card: TEC (R)-61GT2-III
NFPA Code: H; F1; R0;
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ADDITIONAL INFORMATION
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ICSC: 0411
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CATECHOL
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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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