Product Identification

Product Name

2,3-Dimethylpyrazine

Synonyms

Pyrazine, 2,3-dimethyl-

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 C)

Density

1.022 g/cm3 (25 C)

pKa/pKb

12.03 (pKb)

Usage

A component of the aroma of roasted sesame seeds.

Refractive Index

1.51 (20 C)

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 spread 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 goggles, 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