Flavors & Fragrances
REACH
Pyridine
CAS Number
110-86-1
EC Number
203-809-9
Abbreviation
Py, CP.
What is Pyridine?
Pyridine (CAS 110-86-1), also known as Py, is a foundational heterocyclic base.
Where is Pyridine used?
- Industrial: solvent, catalyst and chemical intermediate
- Pharmaceutical manufacturing: reaction solvent and base catalyst in synthesis of antihistamines, sulfonamides and vitamins
- Agrochemicals: key intermediate in herbicide and insecticide synthesis
- Food and flavour formulation: contributes roasted and meaty notes at controlled concentrations
- Home care and industrial cleaning: pyridine-based derivatives act as biocidal actives in disinfectant and preservation systems.
Good to know: FEMA 2966. Buyers sourcing for regulated applications should confirm grade compliance with supplier documentation prior to procurement.
Commercial specifications
- Drums, IBCs and bulk tanker quantities
Other Names (Synonyms)
Tritisan|pyridin|piridina|Azine|Pirydyna|RCRA waste number U196|CP 32|NCI-C55301|Py, CP.
What are the physical properties of Pyridine?
Melting Point -41.6 °C
Boiling Point 115.2-115.3 °C
Density 0.98272 g/cm³ @ Temp: 20 °C
Flash Point 68 °F
Appearance Pyridine is a colorless liquid. Nauseating, sickening fish-like odor. The Odor Threshold is 0.17 ppm.
Color colorless
Odor Nauseating odor detectable at 0.23 to 1.9 ppm (mean = 0.66 ppm)
Form Liquid
Water Solubility Miscible
Vapor Pressure 23.8 mm Hg ( 25 °C)
Refractive Index n 20/D 1.509(lit.)
pH 8.81 (H2O, 20℃)
Log P 0.64 at 20℃
How is Pyridine classified and handled safely? Learn More
Danger
GHS02· Flammable GHS07· Irritant GHS05· Corrosive GHS08· Health Hazard GHS09· Environmental Hazard GHS06· Toxic
Hazard Statements
H225 Highly Flammable liquid and vapor
H302 Harmful if swallowed
H304 May be fatal if swallowed and enters airways
H311 Toxic in contact with skin
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.
Which trade and regulatory codes apply to Pyridine?
HS Code 29333100
UN Number 1282
ADR Class 3
Packing Group II
Storage Class 3 - Flammable liquids
WGK (Germany) 2