4-Methylpyridine manufacturers and suppliers

4-Methylpyridine suppliers

Properties

Melting point:: 2.4 °C (lit.)

Boiling point:: 145 °C (lit.)

Density: 0.957 g/mL at 25 °C (lit.)

vapor density: 3.2 (vs air)

vapor pressure: 4 mm Hg ( 20 °C)

refractive index: n20/D 1.504(lit.)

Flash point:: 134 °F

storage temp.: Store below +30°C.

solubility: alcohol: soluble(lit.)

pka: 6.02(at 20℃)

form: Liquid

color: Clear light yellow

Odor: Obnoxious, Sweetish

explosive limit: 1.3-8.7%(V)

Water Solubility: soluble

Sensitive: Air Sensitive & Hygroscopic

Merck: 14,7402

BRN: 104586

Henry's Law Constant: 1.6×10⁰ mol/(m³Pa) at 25℃, Brockbank (2013)

Dielectric constant: 12.279999999999999

InChI: 1S/C6H7N/c1-6-2-4-7-5-3-6/h2-5H,1H3

InChIKey: FKNQCJSGGFJEIZ-UHFFFAOYSA-N

SMILES: Cc1ccncc1

LogP: 1.22 at 25℃

CAS DataBase Reference: 108-89-4(CAS DataBase Reference)

NIST Chemistry Reference: Pyridine, 4-methyl-(108-89-4)

EPA Substance Registry System: 4-Methylpyridine (108-89-4)

Safety Information

Symbol(GHS): GHS02,GHS06

Signal word: Danger

Hazard statements: H226-H302+H332-H311-H315-H319-H335

Precautionary statements: P210-P280-P301+P312-P303+P361+P353-P304+P340+P312-P305+P351+P338

target organs: Respiratory system

PPE: Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

Hazard Codes: T

Risk Statements: 10-20/22-24-36/37/38

Safety Statements: 26-36-45

RIDADR: UN 2313 (PICOLINES)

WGK Germany: 1

RTECS: UT5425000

Autoignition Temperature: 1000 °F

TSCA: TSCA listed

HazardClass: 3

PackingGroup: III

HS Code: 29333955

Storage Class: 3 - Flammable liquids

Hazard Classifications: Acute Tox. 3 Dermal
Acute Tox. 4 Inhalation
Acute Tox. 4 Oral
Eye Irrit. 2
Flam. Liq. 3
Skin Irrit. 2
STOT SE 3

Hazardous Substances Data: 108-89-4(Hazardous Substances Data)

Toxicity: LD50 orally in rats: 1.29 g/kg (Smyth)

Limited Quantities: 5.0 L (1.3 gallons) (liquid)

Excepted Quantities: Max Inner Pack (30g or 30ml) and Max Outer Pack (1Kg or 1L)

Use

Currently, 4-methylpyridine is produced by vapor-phase condensation of acetaldehyde and ammonia (3:1) with subsequent isolation of 4-methylpyridine from the reaction mixture. Reactants are exposed to dehydration-dehydrogenation catalysis such as lead oxide, copper oxide on alumina, thorium oxide, zinc oxide or cadmium oxide on silica-alumina, or cadmium fluoride on silica-magnesia at 400-500°C. This results in a 60% yield of 4-methylpyridine which is isolated by fractional distillation (USEPA 1982). Another production method involves the isolation from by-products of coking operations. The crude pyridine extracts come from noncondensable and condensable coke-oven gasses that have been dehydrated and separated by fractional distillation, but only 45% of 4-methylpyridine is obtained (USEPA 1982). 4-Methylpyridine also can be isolated from a dry distillation of bones or coal (Hawley 1977).

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