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Chemical Properties

CAS Registry Number: 504-29-0

Selected information from two of the National Library of Medicine's databases: ChemIDPlus2 and HSDB3.

Names 1

  • 2-Pyridinamine (9ci)
  • 2-Pyridylamine
  • O-Aminopyridine

Structure

Chemical Structure for Chemical Abstracts Service Registry Number 504-29-0 from NLM

Synonyms (Sources: NTP,HSDB,RTECS,MESH)2

  • 1,2-Dihydro-2-iminopyridine
  • 2-Aminopyridine
  • 2-Pyridinamine
  • 2-Pyridylamine
  • Amino-2 pyridine
  • HSDB 2068
  • alpha-Aminopyridine
  • alpha-Pyridinamine
  • alpha-Pyridylamine
  • o-Aminopyridine

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Other Registry Numbers2

  • 102769-74-4
  • 29212-31-5
  • 45505-67-7

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Chemical Properties3

Property Description
Boiling Point
  • 210.6 deg C
Color/Form
  • Leaflets, or large crystals
  • WHITE POWDER OR CRYSTALS
  • White leaflets or large colorless crystals
  • White powder, leaflets, or crystals.
Corrosivity
  • None Found
Critical Temperature & Pressure
  • None Found
Density/Specific Gravity
  • 1.065 @ 20 deg C/4 deg C
Dissociation Constants
  • pKa 6.82 @ 20 deg C; Ka 1.51x10-7 @ 20 deg C
  • pKa= 6.86 @ 20 deg C
  • pKa= 6.9 @ 20 deg C
Heat Of Combustion
  • None Found
Heat Of Vaporization
  • None Found
Melting Point
  • 58.1 deg C
Molecular Weight
  • 94.12
Odor
  • Characteristic odor
Other Chemical/Physical Properties
  • Boiling point: 104-106 deg C @ 20 mm Hg
  • Exists as a tautomeric amino and imino forms. Amino form predominates over imino form; ratio 1000:1
Relative Evaporation Rate
  • None Found
Solubilities
  • >100 g/100 g water @ 20 deg C
  • Soluble in alcohol, benzene, ether, and hot petrol ether
  • Soluble in ethanol, ethyl ether, and acetone
  • Water solubility: >100g/100mL at 20 deg C
Spectral Properties
  • IR: 1385 (Coblentz Society Spectral Collection)
  • MASS: 28 (Aldermaston, Eight Peak Index of Mass Spectra, UK)
  • MAX ABSORPTION (ALCOHOL): 234 NM (LOG E= 4.1), 297 NM (LOG E= 3.6); SADTLER REFERENCE NUMBER: 1788 (IR, PRISM), 8199 (IR, GRATING)
  • UV: 500 (Sadtler Research Laboratories Spectral Collection)
Surface Tension
  • None Found
Taste
  • None Found
Vapor Density
  • 3.25 (Air= 1)
Vapor Pressure
  • None Found
Viscosity
  • None Found
log P (octanol-water)
  • log Kow= 0.48
pH
  • BASE

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Uses3

  • Chemical intermediate for manufacture of pharmaceuticals; use in the manufacture of dyes, lubricant antioxidants, and herbicides. **PEER REVIEWED**
  • Intermediate for antihistamines and other pharmaceuticals **PEER REVIEWED**
  • Intermediate in chemical synthesis **PEER REVIEWED**

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Notes (Sources: NTP,HSDB,RTECS,MESH)2

  • None Found.

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Superlist Classes2

  • TWA (0.5 ppm)
  • TWA 0.5 ppm (2 mg/m3)

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Links to Additional Information2

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Footnotes

1 Source: the NTP's CEBS database.

2 Source: the National Library of Medicine's ChemIDPlus, 02/28/2017.

3 Source: the National Library of Medicine's Hazardous Substance Database, 02/28/2017.

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