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CATECHOLICSC: 0411
June 2015
CAS #: 120-80-9Pyrocatechol
1,2-Benzenediol
1,2-Dihydroxybenzene
UN #: 2811
EINECS #: 204-427-5

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. Gives off irritating or toxic fumes (or gases) in a fire.    NO open flames. NO contact with oxidizing agents.    Use water spray, dry powder, alcohol-resistant foam, carbon dioxide.   

 PREVENT DISPERSION OF DUST! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Sore throat. Burning sensation behind the breastbone. Laboured breathing. Convulsions.  Use local exhaust or breathing protection.  Fresh air, rest. Artificial respiration may be needed. Refer for medical attention. 
Skin MAY BE ABSORBED! Redness. Convulsions.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain. Severe burns.  Wear face shield or eye protection in combination with breathing protection.  Rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention. 
Ingestion Abdominal pain. Vomiting. Diarrhoea. Convulsions. Respiratory arrest.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Give one or two glasses of water to drink. Refer immediately for medical attention. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

skull;toxiccorrcancer;health haz
DANGER
Toxic if swallowed or in contact with skin
Causes mild skin irritation
Causes serious eye damage
May cause respiratory irritation
May cause an allergic skin reaction
Suspected of causing genetic defects
Causes damage to central nervous and cardiovascular system
Suspected of causing cancer 

Transportation
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 

STORAGE
Well closed. Separated from oxidants and food and feedstuffs. Keep in the dark. Ventilation along the floor. Store in an area without drain or sewer access. 
PACKAGING
Do not transport with food and feedstuffs. 
CATECHOL ICSC: 0411
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS CRYSTALS WITH CHARACTERISTIC ODOUR. TURNS BROWN ON EXPOSURE TO AIR AND LIGHT. 

Physical dangers
 

Chemical dangers
On combustion, forms toxic fumes. Reacts violently with oxidants. This generates fire and explosion hazard. 

Formula: C6H6O2
Molecular mass: 110.1
Boiling point: 245.5°C
Melting point: 105°C
Relative density (water = 1): 1.3
Solubility in water, g/100ml at 20°C: 43
Vapour pressure, Pa at 20°C: 3 (negligible)
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  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion. 

Effects of short-term exposure
The substance is irritating to the skin and respiratory tract. The substance is corrosive to the eyes. The substance may cause effects on the central nervous system. This may result in depression, convulsions and respiratory failure. Exposure could cause rise of blood pressure. 

Inhalation risk
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C. 

Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization. This substance is possibly carcinogenic to humans. May cause heritable genetic damage to human germ cells. 


Occupational exposure limits
TLV: 5 ppm as TWA; (skin); A3 (confirmed animal carcinogen with unknown relevance to humans) 

ENVIRONMENT
The substance is toxic to aquatic organisms. 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
Symbol: Xn; R: 21/22-36/38; S: (2)-22-26-37 

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    See Also:
       Toxicological Abbreviations
       Catechol (IARC Summary & Evaluation, Volume 71, 1999)