Label abbreviations descriptions

CATECHOL

Chemical Identification
CAS # 120-80-9
Formula

C₆H₆O₂
Synonyms

1,2-benzenediol; o-benzenediol; 1,2-dihydroxybenzene; o-dihydroxybenzene; 2-hydroxyphenol; pyrocatechol

Physical Properties
Physical description Colorless, crystalline solid with a faint odor.
Boiling point 474°F Molecular weight 110.1
Freezing point/melting point 221°F Vapor pressure 10 mmHg at 245°F
Flash point 261°F Vapor density 3.79
Specific gravity 1.34 Ionization potential
Lower explosive limit (LEL) 1.4% Upper explosive limit (UEL) NA
NFPA health rating 3 NFPA fire rating 1
NFPA reactivity rating 0 NFPA special instruction
Vapor hazard ratio (VHR)
Historical exceedance percentage
Target organs

Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0571
Sampling group
Sampler/Sampling media OSHA versatile sampler (OVS-7) - 13 mm XAD-7 tube (270/140 mg) with GFF enclosed (no longer available) [SKC 226-57]
Sampling time*
Sampling volume (TWA)*

100 L
Sampling flow rate (TWA)*

1 L/min
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-FID
Method reference OSHA PV2014 (partially validated)
Notes

SKC recommends the 200/100 mg variant with the same media [SKC 226-57]
Special requirements

* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.

Bulk/Wipe Method
Wipe Sampler/Sampling media
Bulk Method

On-Site Screening Techniques
Device
Model/Type
Sampling information
(see manufacturer instructions)

Exposure Limits
OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
NIOSH REL
Up to 10-hour TWA
(ST) STEL
(C) Ceiling
ACGIH TLV©
8-hour TWA
(ST) STEL
(C) Ceiling
CAL/OSHA PEL
8-hour TWA
(ST) STEL
(C) Ceiling
Peak
PEL-TWA REL-TWA

5 ppm (20 mg/m³)

 TLV-TWA

5 ppm [1985]

 PEL-TWA

5 ppm (20 mg/m³)
PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

NA

 Skin notation

Y

 Skin notation

Y

 Skin notation

Y
Notes:

Not established

 Notes: Notes: Notes:
Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: IARC-2B, TLV-A3 Notes:
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:

Additional Resources and Literature References

Last Updated Date : 12/21/2020