Product Identification

Product Name

2-Butenoic acid

Synonyms

(E)-2-Butenoic acid
3-Methylacrylic acid
a-Crotonic acid
b-Ethylacrylic acid
But-2-enoic acid
trans-2-Butenoic acid

CAS

3724-65-0

Formula

C4H6O2

Molecular Weight

86.1

EINECS

223-077-4

RTECS

GQ2800000

RTECS Class

Primary Irritant

Beilstein/Gmelin

1098434

Beilstein Reference

4-02-00-01498

Physical and Chemical Properties

Appearance

A white crystalline solid. Shipped as either a solid or liquid.

Solubility in water

94 g/L

Melting Point

15

Boiling Point

181

Vapor Pressure

0.51 (25 C)

Density

1.018 g/cm3 (15 C)

pKa/pKb

4.69 (pKa)

Partition Coefficient

.72

Heat Of Vaporization

72.2 kJ/mol

Heat Of Combustion

-2000 kJ/mol

Usage

Manufacture of copolymers with vinyl acetate used in lacquers & paper sizing, manufacture of softening agents for synthetic rubber, in medicinal chemistry, eg, manufacture of dl-threonine, vit a.

Vapor Density

2.97

Refractive Index

1.4455 (20 C)

First Aid Measures

Ingestion

Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately.

Inhalation

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

Skin

Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.

Eyes

Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Handling and Storage

Storage

Store in a cool, dry place. Keep container closed when not in use. Corrosives area.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Do not get in eyes, on skin, or on clothing. Do not ingest or inhale. Use only in a chemical fume hood.

Hazards Identification

Inhalation

May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema.

Skin

Causes skin burns.

Eyes

Causes eye burns.

Ingestion

May cause burns to the digestive tract.

Hazards

When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. May polymerize explosively when heated or involved in a fire. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.

UN (DOT)

2823

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.

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.

Exposure Effects

Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.

Poison Class

4

Fire Fighting Measures

Flash Point

88

Autoignition

396

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Will burn if involved in a fire. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.

Fire Potential

May burn but does not ignite readily.

Accidental Release Measures

Small spills/leaks

Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal.

Stability and Reactivity

Incompatibilities

Oxidizers.

Stability

Stable under normal temperatures and pressures.

Decomposition

Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

2823

Hazard Class

8

Packing Group

III