Chemical Fact Sheet

Chemical Abstract Number (CAS #) 109068
CASRN 109-06-8
Pyridine, 2-methyl-
Analytical Methods EPA Method 8260
Molecular FormulaC6H7N

Link to the National Library of Medicine's Hazardous Substances
Database for more details on this compound.

Use INTERMEDIATE IN DYE AND RESINS INDUSTRIES; SOLVENT CHEM INT FOR 2-CHLORO-6-(TRICHLOROMETHYL)PYRIDINE, 2-VINYLPYRIDINE, HERBICIDE PICLORAM, AMPROLIUM (COCCIDIOSTAT) Organic intermediate for pharmaceuticals, rubber chemicals, solvent, source for vinyl pyridine, laboratory reagent.
Boiling Point 128-129 DEG C
Melting Point -70 DEG C
Molecular Weight 93.12
Density 0.950 @ 15 DEG C/4 DEG C
Odor Threshold Concentration 0.05 mg/cu m (odor low); 0.17 mg/cu m (odor high).
Sensitivity Data Pyridine and its derivatives cause local irritation on contact with the skin, mucous membranes and cornea. Pyridine /IT IS IRRITATING TO RESPIRATORY TRACT.
Environmental Impact 2-Methylpyridine is released to the environment in wastewater and as fugitive emissions during its production and use as a chemical intermediate and solvent. Energy-related processes such as coal and shale oil gasification is another important source of release. Several food items have been found to contain 2-methylpyridine which is either in the food naturally or formed during cooking. 2-Methylpyridine is contained in tobacco smoke and may contribute to its presence in indoor air. If released on land, 2-methylpyridine will leach into the ground and biodegrade within approximately 16 days. If released into water, 2-methylpyridine may be lost through biodegradation, photooxidation and volatilization (half-life 88 hr for a model river). No biodegradation and photooxidation rates in natural waters are available. Bioconcentration in aquatic organisms should not be significant. In the atmosphere, 2-methylpyridine should react with photochemically produced hydroxy radicals (half-life 2.0 days) and be scavenged by rain. In polluted areas containing appreciable nitric acid vapor, reaction with nitric acid may be the major removal process. People are primarily exposed to 2-methylpyridine in occupational settings, although the general public will be exposed from tobacco smoke and some food items.
Environmental Fate TERRESTRIAL FATE: If released on land 2-methylpyridine will leach into the ground and biodegrade. Complete degradation in one soil occurred in about 16 days. AQUATIC FATE: If released into water, 2-methylpyridine should biodegrade and be lost through volatilization (half-life 88 hr for a model river). No estimates of biodegradation rates in natural waters are available. It may also be lost by photooxidation but no data containing actual rates were available. Adsorption to sediment or particulate matter in the water column should not be important. ATMOSPHERIC FATE: If released into the atmosphere, 2-methylpyridine should react with photochemically produced hydroxy radicals (estimated half-life 2.0 days) and be scavenged by rain.
Drinking Water Impact DRINKING WATER: 2-Methylpyridine was reported in drinking water in Cincinnati, OH . GROUNDWATER: Contaminated groundwater from St. Louis Park, MN - site of a coal tar distillation and wood-preserving facility that operated from 1918-1972 - contained 41 ppb of 2 methylpyridine . Two aquifers under the Hoe creek coal gasification site contained 0.88-61 ppb of 2-methylpyridine 15 months after gasification was complete . Not detected in wells in Hanna and Gilette, WY prior to coal gasification . EFFL: 2-Methylpyridine has been identified in effluents from the following industries: timber products, organic chemicals, pharmaceuticals, and public owned treatment works . 2-Methylpyridine is contained in shale oil wastewater (5 ppm) and would be released to the atmosphere if the wastewater is heated as it would be when used to cool hot, retorted oil shale(1,5). It was also found in the effluents from an advanced water treatment facility in Pomona, CA . Wastewater from coal gasification contained an estimated 3.71 ppm of 2-methylpyridine .

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