Product Identification

Product Name

5-Amino-1,3-dihydro-2H-benzimidazol-2-one

Synonyms

2H-Benzimidazol-2-one, 5-amino-1,3-dihydro-
5-Amino-1,3-dihydrobenzimidazol-2-on

CAS

95-23-8

Formula

C7H7N3O

Molecular Weight

149.15

EINECS

202-401-8

Beilstein/Gmelin

137924

Beilstein Reference

5-25-15-00032

Physical and Chemical Properties

Appearance

Solid.

Boiling Point

201

Vapor Pressure

0.31 (25 C)

pKa/pKb

7.48 (pKb)

Partition Coefficient

-.17

Heat Of Vaporization

43.8 kJ/mol

Heat Of Combustion

-3337 kJ/mol

First Aid Measures

Ingestion

Get medical aid. Wash mouth out with water.

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.

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

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.

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

76

Fire Fighting

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

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, acids, acetic anhydride, acid chlorides, carbon dioxide.

Decomposition

Nitrogen oxides, carbon monoxide, carbon dioxide.