Product Identification

Product Name

Prenal

Synonyms

2-Methyl-2-buten-4-al
3,3-Dimethylacrolein
b,b-Dimethylacrolein
b-Methylcrotonaldehyde
Prenal
Senecialdehyde

CAS

107-86-8

Formula

C5H8O

Molecular Weight

84.12

EINECS

203-527-6

Merck

12,8592

Physical and Chemical Properties

Appearance

Pale yellow to reddish liquid.

Solubility in water

Soluble

Melting Point

-20

Boiling Point

132 - 133

Vapor Pressure

8.3 (25 C)

Density

0.8772 g/cm3 (20 C)

Partition Coefficient

1.07

Heat Of Vaporization

37.2 kJ/mol

Refractive Index

1.4526 (20 C)

First Aid Measures

Ingestion

Get medical aid. Wash mouth out with water.

Inhalation

Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.

Skin

Get medical aid. Flush skin with plenty of 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

Keep away from sources of ignition. Store in a cool, dry place. Keep refrigerated. (Store below 4 C.) Store in a tightly closed container. Flammables-area.

Hazards Identification

Ingestion

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

Inhalation

Causes respiratory tract irritation. May be harmful if inhaled.

Skin

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

Eyes

Causes eye irritation.

EC Risk Phrase

R: 10 36/37/38

EC Safety Phrase

S: 16 26 37/39

UN (DOT)

2924

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves and clothing to prevent skin exposure. Use chemical safety goggles.

Respirators

Follow the OSHA respirator regulations found in 29 CFR 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

33

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Extinguishing Media: Use water spray, dry chemical, carbon dioxide, or chemical foam.

Accidental Release Measures

Small spills/leaks

Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Use water spray to dilute spill to a non-flammable mixture. Remove all sources of ignition.

Stability and Reactivity

Incompatibilities

Avoid strong oxidizing agents, strong bases, air.

Stability

Stable at normal temperatures and pressures.

Decomposition

Oxides of carbon.

Transport Information

UN Number

2924