Product Identification

Product Name

Acetyl bromide

Synonyms

Ethanoyl bromide

CAS

506-96-7

Formula

C2H3BrO

Molecular Weight

122.95

EINECS

208-061-7

RTECS

AO5955000

RTECS Class

Other

Merck

13,84

Beilstein/Gmelin

1697546

Beilstein Reference

4-02-00-00398

EC Class

corrosive

Physical and Chemical Properties

Appearance

A colorless fuming liquid with a pungent odor.

Solubility in water

Reacts

Melting Point

-96

Boiling Point

77

Vapor Pressure

122

Density

1.6625 g/cm3 (16 C)

Heat Of Vaporization

30.37 kJ/mol

Usage

Organic synthesis, dye manufacture.

Vapor Density

4.2

Odor threshold

is 5.00X10-4 mg/L

Refractive Index

1.45017 (15.8 C)

First Aid Measures

Ingestion

Seek medical assistance.

Inhalation

Remove victim from exposure; if breathing has stopped, give artificial respiration; if breathing is difficult, give oxygen; watch for delayed lung damage.

Skin

Flush with soap and water; treat burns as needed.

Eyes

Flush with water for at least 15 min.; get medical attention.

Handling and Storage

Storage

Protect from water.

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

Inhalation

Inhalation may produce dyspnea, pleuritic chest pain, upper airway edema, pulmonary edema, hypoxemia, bronchospasm, pneumonitis, and persistent pulmonary function abnormalities. Airway hyperreactivity has also been reported.

Skin

See Inhalation.

Eyes

Tearing, epistaxis, photophobia, blepharospasm, and brown discoloration of mucous membranes and the tongue may be noted.

Ingestion

Ingestion of acids may result in burns, gastrointestinal bleeding, gastritis, perforations, dilation, edema, necrosis, vomiting, stenosis, fistula, and duodenal/jejunal injury.

Hazards

Flashback along vapor trail may occur.

EC Risk Phrase

R 14 34 36/37

EC Safety Phrase

S 26 36/37/39 45

UN (DOT)

1716

Exposure Controls/Personal Protection

Personal Protection

Safety goggles; gloves; adequate ventilation; provisions for flushing eyes or skin with water.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Exposure Effects

Abnormally low blood pressure may occur after ingestion with corrosive injury and hemorrhage from the gastrointestinal tract. Abnormal neuropsychologic function has been reported following hydrochloric acid exposure from a leaking tanker truck.

Poison Class

2

Fire Fighting Measures

Flash Point

71

Fire Fighting

Use dry chemical or carbon dioxide. Do not use water on material itself. If large quantities of combustibles are involved, use water in flooding quantities as spray and fog. Use water spray to knock-down vapors. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.

Fire Potential

Very flammable. Combustion probable.

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. Use water spray to knock-down vapors. Do not use water on material itself. Neutralize spilled material with crushed limestone, soda ash, or lime. Vapor knockdown water is corrosive or toxic and should be diked for containment. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash or cement powder. Water spill: If dissolved, in region of 10 ppm or greater concentration, apply activated carbon at ten times the spilled amount. Adjust pH to neutral (pH=7). Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.

Stability and Reactivity

Disposal Code

11

Stability

Decomposes violently on contact with moisture. Highly reactive. Hydrolyzes readily. Decomposition products are corrosive and toxic fumes of carbonyl bromide and bromine.

Incompatibilities

React vigorously with bases, both organic and inorganic Incompatible with oxidizing agents and alcohols May react vigorously or explosively

Decomposition

When heated to decomposition, it emits highly corrosive and toxic fumes of carbonyl bromide and bromine. Decomposed by water to acetic and hydrobromic acids with release of heat.

Combustion Products

Toxic and irritating hydrogen bromide fumes may form in fires.

Transport Information

UN Number

1716

Hazard Class

8

Packing Group

II

HS Code

2915 90 80