Product Identification

Product Name

tert-Butylisocyanate

Synonyms

1,1-Dimethylethyl isocyanate
2-Isocyanato-2-methylpropane
socyanic acid, tert-butyl ester

CAS

1609-86-5

Formula

C5H9NO

Molecular Weight

99.13

EINECS

216-544-9

Beilstein/Gmelin

969479

Beilstein Reference

4-04-00-00669

Physical and Chemical Properties

Appearance

A clear colorless liquid with a pungent odor.

Solubility in water

Slightly soluble

Melting Point

<-25

Boiling Point

85

Density

0.8359 g/cm3 (20 C)

Refractive Index

1.3965 (20 C)

First Aid Measures

Ingestion

Seek medical assistance.

Inhalation

Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.

Skin

Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.

Eyes

Immediately flush with running water for at least 20 minutes.

Handling and Storage

Storage

Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.

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

See Inhalation.

Inhalation

TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns, or death. Effects may be delayed.

Skin

See Inhalation.

Eyes

See Inhalation.

Hazards

Vapors form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.

EC Risk Phrase

R 11 26 22 36/37/38 42

EC Safety Phrase

S 16 23 26 28 36/37/39 45

UN (DOT)

2484

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate chemical protective clothing. If contact with the material anticipated, wear appropriate chemical protective clothing.

Respirators

Wear positive pressure self-contained breathing apparatus.

Fire Fighting Measures

Flash Point

-4

Fire Fighting

Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Use alcohol foam, dry chemical or carbon dioxide. Keep run-off water out of sewers and water sources.

Fire Potential

HIGHLY FLAMMABLE.

Accidental Release Measures

Small spills/leaks

Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors.

Stability and Reactivity

Incompatibilities

Can react exothermically with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizing agents, hydrides, phenols, and peroxides May react with water to form tert-butylamine and carbon dioxide.

Stability

No data.

Combustion Products

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

Transport Information

UN Number

2484

Hazard Class

6.1

Packing Group

I