O-PHENYLENEDIAMINE

Chemical Identification
Chemical Identification
CAS # 95-54-5
Formula

C₆H₈N₂

Synonyms

1,2-phenylenediamine; 2-aminoaniline; o-benzenediamine; 1,2-benzenediamine; orthamine; o-diaminobenzene; 1,2-diaminobenzene

Physical Properties
Physical Properties
Physical description Colorless monoclinic crystals if pure; technical grade brownish-yellow crystals or a sandy brown solid.
Boiling point 493-496°F Molecular weight 108.16
Freezing point/melting point 216-219°F Vapor pressure
Flash point 313°F Vapor density
Specific gravity Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
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
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) P245
Sampling group
Sampler/Sampling media 2 GFFs (37 mm) coated with sulfuric acid, in 3-piece cassette, separated by the ring section [SKC 225-9004]
Sampling time*

100 min

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 HPLC
Method reference OSHA 87 (fully validated)
Notes
 

Filters may be obtained by OSHA personnel from the SLTC. 

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.

Wipe Method
Wipe Method
Sampler/Sampling media
 

 

Bulk Method
Bulk Method
 

 

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

 

TLV-TWA
 

0.1 mg/m³ [1988]

PEL-TWA
 

 

PEL-STEL
 

 

REL-STEL
 

 

TLV-STEL
 

 

PEL-STEL
 

 

PEL-C
 

 

REL-C
 

 

TLV-C
 

 

PEL-C
 

 

Skin notation
 

NA

Skin notation
 

NA

Skin notation
 

N

Skin notation
 

NA

Notes:
 

Not established

Notes:
 

Not established

Notes:
 

 

Notes:
 

Not established

Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: TLV-A3 Notes:
 

 

AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
 

 

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - 1,2-Phenylenediamine

NIOSH: Pocket Guide to Chemical Hazards - 1,2-Phenylenediamine

Literature References

 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - o-Phenylenediamine. See annual publication for most recent information.

Last Updated Date : 01/07/2021