O-DIANISIDINE

Chemical Identification
Chemical Identification
CAS # 119-90-4
Formula

C₁₄H₁₆N₂O₂

Synonyms

dianisidine; 3,3'-dianisidine; 3,3'-dimethoxybenzidine

Physical Properties
Physical Properties
Physical description Colorless crystals that turn a violet color on standing.
Boiling point Molecular weight 244.3
Freezing point/melting point 279°F Vapor pressure
Flash point 403°F Vapor density 8.5
Specific gravity Ionization potential
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 1 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.) 0873
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)*

15 L

Sampling flow rate (STEL/Peak/C)*

1 L/min

Analytical method instruments GC-ECD
Method reference OSHA 71 (fully validated)
Notes

Within ten hours after sampling, transfer filter to glass vial containing 2 mL deionized water. Sample must be shipped and stored at 0°C or colder. Analyze as soon as possible.

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 PEL-TWA
 

 

PEL-STEL REL-STEL TLV-STEL PEL-STEL
 

 

PEL-C REL-C TLV-C
 

 

PEL-C
 

 

Skin notation

NA

Skin notation

N

Skin notation
 

NA

Skin notation
 

NA

Notes:

Not established

Notes:

CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens. See also, Appendix C, Supplementary Exposure Limits.

Notes:
 

Not established

Notes:
 

Not established

Health factors:  See NIH-NLM PubChem. IDLH
Carcinogenic classifications: IARC-2B, NIOSH-Ca, NTP-R Notes:
 

Ca

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

 

Additional Resources and Literature References
Additional Resources and Literature References

NOAA: CAMEO Chemicals - 3,3'-Dimethoxybenzidine

NIOSH: Pocket Guide to Chemical Hazards - o-Dianisidine

Literature References

 

 

Last Updated Date : 01/07/2021