O-TOLIDINE
| CAS # | 119-93-7 |
|---|---|
| Formula |
C₁₄H₁₆N₂ |
| Synonyms |
4,4'-diamino-3,3'-dimethylbiphenyl; diaminoditolyl; 3,3'-dimethylbenzidine; 3,3'-dimethyl-4,4'-diphenyldiamine; 3,3'-tolidine |
| Physical description | White to reddish crystals or powder. | ||
|---|---|---|---|
| Boiling point | 392°F | Molecular weight | 212.3 |
| Freezing point/melting point | 264°F | Vapor pressure | 1x10-6 mmHg (est) |
| Flash point | 471°F | Vapor density | |
| Specific gravity | 1 | Ionization potential | |
| Lower explosive limit (LEL) | Upper explosive limit (UEL) | ||
| NFPA health rating | NFPA fire rating | ||
| NFPA reactivity rating | NFPA special instruction | ||
| Vapor hazard ratio (VHR) | |||
| Historical exceedance percentage | |||
| Target organs | |||
| Analyte code (IMIS no.) | 2450 | ||
|---|---|---|---|
| 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 |
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| Sampling volume (TWA)* | 100 L |
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| Sampling flow rate (TWA)* | 1 L/min |
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| Sampling volume (STEL/Peak/C)* |
15 L |
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| Sampling flow rate (STEL/Peak/C)* |
1 L/min |
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| 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. |
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| Special requirements |
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* 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 Sampler/Sampling media |
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|---|---|
| Bulk Method |
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| Device | |||||
|---|---|---|---|---|---|
| Model/Type | |||||
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Sampling information (see manufacturer instructions) |
|
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 |
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|---|---|---|---|---|---|---|---|
| PEL-TWA |
|
REL-TWA |
|
TLV-TWA |
|
PEL-TWA |
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| PEL-STEL |
|
REL-STEL |
|
TLV-STEL |
|
PEL-STEL |
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| PEL-C |
|
REL-C |
0.02 mg/m³ [60 minutes] |
TLV-C |
|
PEL-C |
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| Skin notation |
NA |
Skin notation |
Y |
Skin notation |
Y |
Skin notation |
NA |
|
Notes:
Not established |
Notes:
CARCINOGEN (Ca): REDUCE EXPOSURE TO LOWEST FEASIBLE CONCENTRATION. See Appendix A, NIOSH Potential Occupational Carcinogens. |
Notes:
TLV value not established [1992] |
Notes:
Not established |
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| Health factors: See NIH-NLM PubChem. | IDLH | ||||||
| Carcinogenic classifications: NIOSH-Ca, TLV-A3, IARC-2B, NTP-R |
Notes:
Ca |
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AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3:
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Additional Resources and Literature References
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NOAA: CAMEO Chemicals - 3,3'-Dimethylbenzidine NIOSH: Pocket Guide to Chemical Hazards - o-Tolidine Literature References
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Last Updated Date : 01/07/2021