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NIOSH

CATECHOL

ICSC: 0411

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
July 04, 1997 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Combustible.
NO open flames.
Water spray, powder.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST!

•INHALATION Burning sensation. Cough. Laboured breathing.
Local exhaust or breathing protection.
Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.
•SKIN MAY BE ABSORBED! Redness.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower.
•EYES Redness. Pain. Severe deep burns.
Face shield or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION Abdominal pain. Diarrhoea. Vomiting.
Do not eat, drink, or smoke during work.
Rinse mouth. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

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.
Separated from strong oxidants, food and feedstuffs . Keep in the dark. Ventilation along the floor.
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
ICSC: 0411 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

CATECHOL

ICSC: 0411

I

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P

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T

A

N

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D

A

T

A

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


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.

PHYSICAL
PROPERTIES

Boiling point: 245.5°C
Melting point: 105°C
Relative density (water = 1): 1.3
Solubility in water, g/100 ml: 43
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

ENVIRONMENTAL
DATA

The substance is toxic to aquatic organisms.

N O T E S

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;

ADDITIONAL INFORMATION



ICSC: 0411 CATECHOL
(C) IPCS, CEC, 1994
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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