Label abbreviations descriptions

ANISIDINE (O-, P- ISOMERS)†

Chemical Identification
CAS # 90-04-0; 104-94-9; 29191-52-4
Formula

C₇H₉NO
Synonyms

ortho-aminoanisole; 2-anisidine; o-methoxyaniline [Note: o-anisidine has been used as a basis for many dyes.]; para-aminoanisole; 4-anisidine; p-methoxyaniline

Physical Properties
Physical description A fused crystalline solid or a reddish to yellowish oily liquid.
Boiling point 437°F Molecular weight 123.2
Freezing point/melting point 41°F Vapor pressure <0.1 mmHg
Flash point 244°F (open cup) Vapor density 4.25
Specific gravity 1.10 Ionization potential 7.44 eV
Lower explosive limit (LEL) Upper explosive limit (UEL)
NFPA health rating 2 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.) 0225
Sampling group
Sampler/Sampling media Silica gel tube (150/75 mg) [SKC 226-10]
Sampling time*
Sampling volume (TWA)*

24-320 L
Sampling flow rate (TWA)*

0.5-1 L/min
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments HPLC-UV
Method reference NIOSH 2514 (fully validated)
Notes
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

0.5 mg/m³

 REL-TWA

0.5 mg/m³

 TLV-TWA PEL-TWA

0.1 ppm (0.5 mg/m³)
PEL-STEL REL-STEL TLV-STEL PEL-STEL
PEL-C REL-C TLV-C PEL-C
Skin notation

Y

 Skin notation

Y

 Skin notation

Y

 Skin notation

Y
Notes:

See 29 CFR 1910.1000 Table Z-1.

 Notes:

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

 Notes:

Visit the ACGIH TLV site for specific data
BEI®

 Notes:
Health factors:  See NIH-NLM PubChem. IDLH

50 mg/m³
Carcinogenic classifications: IARC-2B, NIOSH-Ca, TLV-A3 (o-anisidine), TLV-A4 (p-anisidine) Notes:

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

Additional Resources and Literature References

Last Updated Date : 03/29/2024