1. OSHA Occupational Chemical Database
  2. 2-AMINOPYRIDINE
Label abbreviations descriptions

2-AMINOPYRIDINE†

Chemical Identification
Chemical Identification
CAS # 504-29-0
Formula

C₅H₆N₂
Synonyms

α-aminopyridine; α-pyridylamine
Physical Properties
Physical Properties
Physical description White powder, leaflets, or crystals with a characteristic odor.
Boiling point 411°F Molecular weight 94.1
Freezing point/melting point 137°F Vapor pressure 0.8 mmHg at 77°F
Flash point 198°F Vapor density
Specific gravity Ionization potential 8.00 eV
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
Monitoring Methods Used by OSHA
Monitoring Methods Used by OSHA
Analyte code (IMIS no.) 0165
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*

240 min
Sampling volume (TWA)*

240 L
Sampling flow rate (TWA)*

1 L/min
Sampling volume (STEL/Peak/C)*
Sampling flow rate (STEL/Peak/C)*
Analytical method instruments GC-NPD
Method reference OSHA PV2143 (partially 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.

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
 

0.5 ppm (2 mg/m³)

 REL-TWA
 

0.5 ppm (2 mg/m³)

 TLV-TWA
 

0.5 ppm [1966]

 PEL-TWA
 

 
PEL-STEL
 

 

 REL-STEL
 

 

 TLV-STEL
 

 

 PEL-STEL
 

 
PEL-C
 

 

 REL-C
 

 

 TLV-C
 

 

 PEL-C
 

 
Skin notation
 

N

 Skin notation
 

N

 Skin notation
 

N

 Skin notation
 

N
Notes:
 

See 29 CFR 1910.1000 Table Z-1.

 Notes:
 

 

 Notes:
 

 

 Notes:
 

 
Health factors:  See NIH-NLM PubChem. IDLH
 

5 ppm
Carcinogenic classifications: 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 - 2-Aminopyridine

NIOSH: Pocket Guide to Chemical Hazards - 2-Aminopyridine

Literature References

 
  • ACGIH: Documentation of the Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) - 2-Aminopyridine. See annual publication for most recent information.
  • NIOSH: The Registry of Toxic Effects of Chemical Substances: Pyridine, 1-amino- (RTECS #: US1575000).
  • International Chemical Safety Cards (WHO/IPCS/ILO): 2-Aminopyridine.
  • Pohanish, R.P. (editor): 2-Aminopyridine. In, Sittig's Handbook of Toxic and Hazardous Chemicals and Carcinogens, Fourth Ed., Vol. 1. Norwich, NY: Noyes Publications, William Andrew Publishing, 2002, pp. 140-141.

Last Updated Date : 01/28/2021