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Pyridine

Pyridine structure

CAS No:
110-86-1
Formula:
C5H5N
Chemical Name:
Pyridine
Synonyms:
Pyridine;Azabenzene;Azine;CP 32;NSC 141574;NSC 406123;6999-00-4;45410-39-7;62301-32-0;82005-06-9;85404-20-2;85404-19-9;733733-47-6;857961-06-9;152758-95-7;163392-20-9
Categories:
Flavors and Fragrances > Synthetic Fragrances

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Description

Colorless to yellow liquid with a nauseating, fish-like odor.

Pyridine Basic Attributes

Molecular Weight：

79.1

Exact Mass：

79.10

BRN：

103233

EC Number：

203-809-9

HScode：

2933310010

Characteristics

PSA：

12.9

XLogP3：

0.65

Appearance：

colorless Liquid

Density：

0.98272 g/cm³ @ Temp: 20 °C

Melting Point：

-41.6 °C

Boiling Point：

115.2-115.3 °C

Flash Point：

68 °F

Refractive Index：

1.501

Water Solubility：

Micible with water.

Storage Conditions：

Store at RT.

Vapor Pressure：

23.8 mm Hg ( 25 °C)

Vapor Density：

2.72 (vs air)

Toxicity：

Oral-Rat LD50: 891 mg/kg; Intravenous-Mouse LD50: 1500 mg/kg

Flammability characteristics：

Inflammable in case of open flame, high temperature, oxidant; burning produces toxic nitrogen oxide fumes

Explosive limit：

12.4%

Odor：

Sharp, nauseating

Taste：

AMINE TASTE

PH：

8.5 (0.2 molar soln in water)

Safety Information

Packing level：

Hazard category：

Transport codes：

UN 1282 3/PG 2

wgk germany：

hazard class code：

11-20/21/22-39/23/24/25-23/24/25-52-36/38

safety instructions：

36/37/39-38-45-61-28A-26-28-24/25-22-36/37-16-7

RTECS Number：

UR8400000

Marks：

T,N,F,Xn

Storage features：

The warehouse is ventilated, low temperature and dry; stored separately from oxidants and acids

Hazard note：

Highly Flammable/Harmful

Explosive characteristics：

Explosive when mixed with air

Stability/Shelf Life：

Stable. Flammable. Incompatible with strong oxidizing agents, strong acids.

Precautionary statement(s)：

P210-P280-P305 + P351 + P338

Hazard Statements：

H225-H302 + H312 + H332-H315-H319

Toxicity

Toxicity class：

moderately

Pyridine Use and Manufacturing

Methods of Manufacturing

Saturator mother liquor during high-temperature coking is used as raw material, crude pyridine is recovered and processed, slag is removed by heating to obtain aqueous pyridine, dehydrated with pure benzene, and anhydrous pyridine is obtained, and then 110-120°C fraction is distilled by distillation. From rectification.

Uses

Among the many derivatives of pyridine, some are important drugs, and some are important components of vitamins or enzymes. For example, the amide of pyridine-3-carboxylic acid (ie nicotinamide) forms an important dinucleotide with adenine (see purine), ribose and phosphoric acid in Coenzyme I. Isoniazid, a derivative of pyridine, is an oral anti-tuberculosis drug. 2-Methyl-5-vinylpyridine is an important raw material for synthetic rubber. Pyridine can be obtained from natural coal tar, or can be made from acetaldehyde and ammonia. In addition to being a solvent, pyridine can also be used as a denaturant, dye assistant, and starting material for a series of products, including medicines, disinfectants, dyes, food seasonings, adhesives, explosives, etc.

Computed Properties

Molecular Weight:79.10
XLogP3:0.7
Hydrogen Bond Acceptor Count:1
Exact Mass:79.042199164
Monoisotopic Mass:79.042199164
Topological Polar Surface Area:12.9
Heavy Atom Count:6
Complexity:30.9
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

3-Methylpyridine

Benzene

Ammonia

Sulfuric acid

Price Analysis

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Data: 2026-09-03
Price: 19000.00Yuan/mt
Change: 0

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