Product Identification

Product Name

Diethyl maleate

Synonyms

2-Butenedioic acid, (Z)-, diethyl ester
Diethyl (Z)-but-2-enedioate
Ethyl maleate
Maleic acid, diethyl ester
Staflex DEM

CAS

141-05-9

Formula

C8H12O4

Molecular Weight

172.18

EINECS

205-451-9

RTECS

ON1225000

RTECS Class

Mutagen; Primary Irritant

Merck

13,3150

Beilstein/Gmelin

1100825

Beilstein Reference

4-02-00-02207

EC Class

irritant

Physical and Chemical Properties

Appearance

Clear, colorless liquid.

Solubility in water

Insoluble

Melting Point

-11

Boiling Point

225

Vapor Pressure

10 (57 C)

Density

1.0806 g/cm3 (8 C)

Vapor Density

5.94

Refractive Index

1.43969 (16.2 C)

First Aid Measures

Ingestion

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.

Inhalation

Remove from exposure 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 soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.

Eyes

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

Keep away from heat, sparks, and flame. Keep away from sources of ignition. Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.

Hazards Identification

Ingestion

May cause irritation of the digestive tract.

Inhalation

May cause respiratory tract irritation.

Skin

Causes mild skin irritation.

Eyes

Causes mild eye irritation.

Hazards

During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.

EC Risk Phrase

R 43

EC Safety Phrase

S 28 36/37

UN (DOT)

3334

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 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.

Poison Class

4

Fire Fighting Measures

Flash Point

93

Autoignition

350

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. Use water spray to keep fire-exposed containers cool. Combustible Liquid. Containers may explode when heated. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use water spray to cool fire-exposed containers.

Upper exp. limit

7.7

Lower exp. limit

1.1

Accidental Release Measures

Small spills/leaks

Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Provide ventilation.

Stability and Reactivity

Disposal Code

1

Incompatibilities

Oxidizing agents, reducing agents, acids, bases.

Stability

Stable under normal temperatures and pressures.

Decomposition

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

Transport Information

UN Number

3334

HS Code

2917 19 90