Product Identification
【Product Name】2,3-Dimethylpyrazine   2,3-二甲基吡嗪
【CAS】5910-89-4
【Formula】C6H8N2
【Molecular Weight】108.14
【EINECS】227-630-0
【RTECS】UQ2625000
【RTECS Class】Other
【Beilstein/Gmelin】107908
【Beilstein Reference】5-23-05-00492
【EC Class】flammable, harmful

Physical and Chemical Properties
【Appearance】Clear, yellow liquid. with a nutty odor.
【Solubility in water】Miscible.
【Melting Point】-12℃
【Boiling Point】156℃
【Vapor Pressure】30 (20℃)
【Density】1.022 g/cm3 (25℃)
【pKa/pKb】12.03 (pKb)
【Usage】

A component of the aroma of roasted sesame seeds.
【Refractive Index】1.51 (20℃)

First Aid Measures
【Ingestion】Get medical aid immediately. Wash mouth out with water.
【Inhalation】Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
【Skin】Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
【Eyes】Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower lids. Get medical aid.

Handling and Storage
【Storage】Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container.
【Handling】All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification
【Ingestion】Harmful if swallowed.
【Inhalation】May cause irritation.
【Skin】May cause irritation.
【Eyes】May cause irritation.
【Hazards】Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will sp along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
【EC Risk Phrase】R 10 22
【EC Safety Phrase】S 23 36/37
【UN (DOT)】1993

Exposure Controls/Personal Protection
【Personal Protection】Wear appropriate safety ggles, protective clothing and gloves.
【Respirators】Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Fire Fighting Measures
【Flash Point】54℃
【Fire Fighting】Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. In case of fire use water spray, dry chemical, carbon dioxide, orchemical foam.
【Fire Potential】HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.

Accidental Release Measures
【Small spills/leaks】Make no contact with the spilled material. ELIMINATE all ignition sources and ground all equipment. Stop leak if you can do it without risk. A vapor suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean non-sparking tools to collect absorbed material.

Stability and Reactivity
【Disposal Code】5
【Incompatibilities】Keep away from strong oxidizing agents, strong acids.
【Stability】No data.
【Combustion Products】Fire may produce irritating, corrosive and/or toxic gases.

Transport Information
【UN Number】1993
【Hazard Class】3
【Packing Group】I; II; III
【HS Code】2933 99 90