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Pyridine

CAS Number
110-86-1
EC Number
203-809-9
Chemical Formula
C5H5N
Molecular Weight
79.10 g/mol

Description

Pyridine ( CAS 110-86-1 ), also known by the abbreviation Py, is a foundational heterocyclic base used across pharmaceutical synthesis, agrochemical manufacturing, and specialty chemical production. With FEMA 2966 status, it also holds a recognized role as a flavoring agent in food applications. In industrial settings, it functions primarily as a solvent, catalyst, and chemical intermediate. In pharmaceutical manufacturing, pyridine serves as a reaction solvent and base catalyst in the synthesis of antihistamines, sulfonamides, and vitamins, where its ability to neutralize acids drives reaction efficiency. Agrochemical producers rely on it as a key intermediate in herbicide and insecticide synthesis, particularly for pyridine-derived active ingredients. It is essential for large-scale crop protection manufacturing. In food and flavor formulation, it contributes characteristic roasted and meaty notes to flavor systems at controlled concentrations under FEMA guidelines. This makes it a versatile tool for flavor chemists. Home care and industrial cleaning product formulators use pyridine-based derivatives as biocidal actives in disinfectant and preservation systems. These applications ensure high standards of hygiene and safety. Pyridine is supplied as a clear liquid in drums, IBCs, and bulk tanker quantities. Standard commercial grades include technical grade and pharmaceutical-grade meeting USP and BP specifications. Buyers sourcing for regulated applications should confirm grade compliance with supplier documentation prior to procurement. Proper handling and storage are required to maintain the integrity of the chemical product. Contact us for supply of Pyridine Request Quote

Other Names (Synonyms)

Tritisan | pyridin | piridina | Azine | Pirydyna | RCRA waste number U196 | CP 32 | NCI-C55301 | Py, CP.

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point-41.6 °C
Boiling Point115.2-115.3 °C
Density0.98272 g/cm³ @ Temp: 20 °C
Flash Point68 °F
AppearancePyridine is a colorless liquid. Nauseating, sickening fish-like odor. The Odor Threshold is 0.17 ppm.
Colorcolorless
OdorNauseating odor detectable at 0.23 to 1.9 ppm (mean = 0.66 ppm)
FormLiquid
Water SolubilityMiscible
Vapor Pressure23.8 mm Hg ( 25 °C)
Refractive Indexn 20/D 1.509(lit.)
pH8.81 (H2O, 20℃)
Log P0.64 at 20℃

Safety & Handling

Danger
GHS02· FlammableGHS07· IrritantGHS05· CorrosiveGHS08· Health HazardGHS09· EnvironmentGHS06· Toxic

Hazard Statements

H225Highly Flammable liquid and vapor
H302Harmful if swallowed
H304May be fatal if swallowed and enters airways
H311Toxic in contact with skin
H312Harmful in contact with skin
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H318Causes serious eye damage
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation
H336May cause drowsiness or dizziness
H351Suspected of causing cancer
H361Suspected of damaging fertility or the unborn child
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H373May causes damage to organs through prolonged or repeated exposure
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary Statements

P203Obtain, consult and follow expert instructions for use.
P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233Keep container tightly closed.
P240Ground and bond container and receiving equipment.
P241Use explosion-proof equipment.
P242Use non-sparking tools.
P243Take action to prevent static discharges.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P262Do not get in eyes, on skin, or on clothing.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P318IF exposed or concerned, get medical advice.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P331Do NOT induce vomiting.
P363Wash contaminated clothing before reuse.
P391Collect spillage.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off immediately all contaminated clothing and wash it before reuse.
P364Take off contaminated clothing and wash it before reuse.
P378Use … for extinction.
P233Store in a well-ventilated place. Keep container tightly closed.
P235Store in a well-ventilated place. Keep cool.
P331Rinse mouth. Do NOT induce vomiting.
P354IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower.
P353IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29333100
UN Number1282
ADR Class3
Packing GroupII
Storage Class3 - Flammable liquids
WGK (Germany)2