Product ID:


 CAS 110-86-1







Formula Weight:




Pricing/Pack Size

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pyridine Chemical Properties

mp -42 °C
bp 96-98 °C(lit.)
density 0.983 g/mL at 20 °C
vapor density 2.72 (vs air)
vapor pressure 23.8 mm Hg ( 25 °C)
refractive index n20/D 1.509(lit.)
FEMA 2966
Fp 68 °F
storage temp. Store at RT.
Water Solubility Miscible
FreezingPoint -42℃
Merck 14,7970
BRN 103233
Stability:Stable. Flammable. Incompatible with strong oxidizing agents, strong acids.
CAS DataBase Reference110-86-1(CAS DataBase Reference)
NIST Chemistry ReferencePyridine(110-86-1)
EPA Substance Registry SystemPyridine(110-86-1)

pyridine Safety Information

Hazard Codes T,N,F,Xn
Risk Statements 11-20/21/22-39/23/24/25-23/24/25
Safety Statements 36/37/39-38-45-61-28A-26-28-24/25-22-36/37-16-7
RIDADR UN 1282 3/PG 2
WGK Germany 2
RTECS UR8400000
Hazard Note Highly Flammable/Harmful
HazardClass 3
PackingGroup II
Hazardous Substances Data110-86-1(Hazardous Substances Data)

pyridine Usage and Synthesis

Chemical PropertiesColorless to light yellow liquid
General DescriptionA clear colorless to light yellow liquid with a penetrating nauseating odor. Density 0.978 g / cm3. Flash point 68°F. Vapors are heavier than air. Toxic by ingestion and inhalation. Combustion produces toxic oxides of nitrogen.
Air & Water ReactionsHighly flammable. Soluble in water.
Reactivity ProfileAzabenzene is a base. Reacts exothermically with acids. During preparation of a complex of Azabenzene with chromium trioxide, an acid, the proportion of chromium trioxide was increased. Heating from this acid-base reaction led to an explosion and fire [MCA Case History 1284 1967]. A 0.1% solution of Azabenzene (or other tertiary amine) in maleic anhydride at 185°C gives an exothermic decomposition with rapid evolution of gas [Chem Eng. News 42(8); 41 1964]. Mixing Azabenzene in equal molar portions with any of the following substances in a closed container caused the temperature and pressure to increase: chlorosulfonic acid, nitric acid (70%), oleum, sulfuric acid (96%), or propiolactone [NFPA 1991]. The combination of iodine, Azabenzene, sulfur trioxide, and formamide developed a gas over pressurization after several months. This arose from the slow formation of sulfuric acid from external water, or from dehydration of the formamide to hydrogen cyanide. Ethylene oxide and SO2 can react violently in Azabenzene solution with pressurization if ethylene oxide is in excess (Nolan, 1983, Case History 51).
Health HazardVapor irritates eyes and nose. Liquid irritates skin and is absorbed through the skin. Overexposure causes nausea, headache, nervous symptoms, increased urinary frequency.
Fire HazardBehavior in Fire: Vapor is heavier than air and may travel considerable distance to source of ignition and flash back.

pyridine Raw Materials and Downstream Products

Downstream ProductsMethyl 2-Fluoroisonicotinate-->2-ACETYL-5-CYANOTHIOPHENE-->5-BROMO-2-FLUOROCINNAMIC ACID-->4-NITROISOPHTHALIC ACID-->3,5-DIMETHOXYCINNAMIC ACID-->2-(2-Butoxyethoxy)ethyl acetate-->2,4-MESITYLENEDISULFONYL DICHLORIDE-->(4-FLUORO-BENZYL)-METHYL-AMINE-->1-Phenacylpyridinium bromide-->3-(TRIFLUOROMETHOXY)CINNAMIC ACID-->trans-Ferulic acid-->3-(Trifluoromethyl)pyrazole-->4-Fluorocinnamic acid-->Indigosol Green Blue IBC-->2-Amino-4-methyl-5-acetylthiazole-->Benzyl 2-chloroacetate-->5-ACETAMIDONICOTINIC ACID-->7-ACETOXYCOUMARIN-->2-AMINO-4-METHYL-QUINOLINE-3-CARBONITRILE-->N-PHENYLISONICOTINAMIDE-->Allyl methyl carbonate-->PYRIDINE-3-SULFONYL CHLORIDE-->3,5-Dimethoxy-4-hydroxybenzaldehyde-->2,4,5,6-TETRAMETHYLBENZENEDISULFONYL DICHLORIDE-->3-(3-METHYL-2-THIENYL)ACRYLIC ACID-->Vat Grey M-->17beta-Hydroxy-17-methylandrosta-4,9(11)-dien-3-one-->butyl N-phenylcarbamate-->3-Methoxycinnamic acid-->1-CHLORO-2-METHYLPROPYL CHLOROFORMATE-->Pyrazinecarbonitrile-->2-AMINO-6-CHLORO-3,5-DICYANOPYRIDINE-->4-BROMO-TETRAHYDROPYRAN-->Phenylcarbamic acid propyl ester-->Hydrocortisone acetate-->5-METHYLPICOLINIC ACID-->4-Acetamido-2-chloropyridine-->Pyridinium toluene-4-sulphonate-->1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one-->Paraquat dichloride
Raw MaterialsSulfuric acid -->Ammonia-->Benzene-->COAL TAR-->3-Picoline-->COKEOVENGAS-->1,5-DIAMINOPENTANE DIHYDROCHLORIDE