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Catechol

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Synonyms & Trade Names
1,2-Benzenediol, o-Benzenediol, 1,2-Dihydroxybenzene, o-Dihydroxybenzene, 2-Hydroxyphenol, Pyrocatechol
CAS No.
120-80-9
RTECS No.
UX1050000
DOT ID & Guide
Formula
C₆H₄(OH)₂
Conversion
1 ppm = 4.50 mg/m3
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
TWA 5 ppm (20 mg/m3) [skin]
OSHA PEL
none See Appendix G
Measurement Methods
OSHA PV2014
See: NMAM or OSHA Methods
Physical Description
Colorless, crystalline solid with a faint odor. [Note: Discolors to brown in air & light.]
Molecular Weight
110.1
Boiling Point
474°F
Melting Point
221°F
Solubility
44%
Vapor Pressure
(244°F): 10 mmHg
Ionization Potential
?
Specific Gravity
1.34
Flash Point
261°F
Upper Explosive Limit
?
Lower Explosive Limit
1.4%
Combustible Solid
Incompatibilities & Reactivities
Strong oxidizers, nitric acid
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, respiratory system; skin sensitization, dermatitis; lacrimation (discharge of tears), burns eyes; convulsions, increased blood pressure, kidney injury
Target Organs
Eyes, skin, respiratory system, central nervous system, kidneys
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:Daily
Provide:Eyewash
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Water wash immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0411
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health