Product Identification

Product Name

1,3,5-Trimethylpyrazole

Synonyms

1,3,5-Trimethylpyrazole

CAS

1072-91-9

Formula

C6H10N2

Molecular Weight

110.15

Beilstein/Gmelin

110515

Beilstein Reference

5-23-05-00125

Physical and Chemical Properties

Appearance

Solid.

Solubility in water

Soluble

Melting Point

30 - 35

Boiling Point

167 - 170

Vapor Pressure

3 (25 C)

Density

0.9269 g/cm3 (40C)

pKa/pKb

10.17 (pKb)

Partition Coefficient

1.09

Heat Of Vaporization

38.0 kJ/mol

Refractive Index

1.4589 (57 C)

First Aid Measures

Ingestion

Get medical aid. Wash mouth out with water.

Inhalation

Remove from exposure to fresh air immediately.

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 eyelids. Get medical aid.

Handling and Storage

Storage

Store in a cool, dry place. Store in a tightly closed container.

Handling

Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes.

Hazards Identification

Ingestion

May cause irritation of the digestive tract. May be harmful if swallowed.

Inhalation

May cause respiratory tract irritation. May be harmful if inhaled. Possible peripheral nervous system effects and mild liver dysfunction may occur. Alcohol consumed before and after exposure may increase adverse effects.

Skin

May cause skin irritation. May be harmful if absorbed through the skin.

Eyes

May cause eye irritation.

EC Risk Phrase

R 10 36/37/38

EC Safety Phrase

S 26 36

UN (DOT)

1325

Exposure Controls/Personal Protection

Personal Protection

Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

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

50

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container.

Stability and Reactivity

Stability

No data.

Incompatibilities

Strong oxidizing agents.

Decomposition

Nitrogen oxides, carbon monoxide, carbon dioxide.

Transport Information

UN Number

1325