Product Identification

Product Name

Crotonaldehyde

Synonyms

(E)-2-Butenal
(E)-But-2-enal
beta-Methylacrolein
Crotenaldehyde
Crotonaldehyde
trans-2-Butenal

CAS

123-73-9

Formula

C4H6O

Molecular Weight

70.099999999999994

EINECS

204-647-1

RTECS

GP9625000

RTECS Class

Mutagen; Human Data; Primary Irritant

Merck

13,2624

Beilstein/Gmelin

906731

Beilstein Reference

3-01-00-02968

EC Index Number

605-009-00-9

EC Class

Highly flammable; Mutagenic Category 3; Very toxic; Toxic; Harmful; Irritant; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Water-white, mobile liquid. Pungent, suffocating odor.

Solubility in water

more than 50 g/100 ml

Melting Point

-73.9

Boiling Point

102

Vapor Pressure

38 (20 C)

Density

0.853 g/cm3 (20 C)

Heat Of Vaporization

38.9 kJ/mol

Heat Of Combustion

-2268 kJ/mol

Usage

Chemical intermediate for n-butyl alcohol, quinaldine, crotonic acid, surface-active agents, textile & paper sizes, insecticides & flavoring agents, fuel-gas warning agent, solvent for polyvinyl chloride, alcohol denaturant, leather tanning agent.

Vapor Density

2.41

Odor threshold

0.5 ppm

Refractive Index

1.4366 (20 C)

First Aid Measures

Ingestion

Induce vomiting. Get medical aid immediately. Wash mouth out with water.

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. 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

Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Keep under a nitrogen blanket. Flammables-area.

Handling

Use spark-proof tools and explosion proof equipment. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Take precautionary measures against static discharges. Use only in a chemical fume hood. Store and handle protected from air.

Hazards Identification

Inhalation

Causes respiratory tract irritation. May cause irritation of the respiratory tract with burning pain in the nose and throat, coughing, wheezing, shortness of breath and pulmonary edema. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema. Toxic if inhaled.

Skin

Causes skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material. Substance is rapidly absorbed through the skin. Causes redness and pain.

Eyes

Causes eye irritation. Contact with liquid or vapor causes severe burns and possible irreversible eye damage. Lachrymator. Causes redness and pain. Lachrymator.

Ingestion

Harmful if swallowed.

Hazards

Vapors form explosive mixtures in air or in sewers. Hazardous peroxides and acids emitted when heated to decomposition. Avoid nitric acid. Unstable, avoid oxygen, heat, elevated pressures. Hazardous polymerization may occur. Avoid contact with alkaline materials such as caustic ammonia or amines, or at elevated temperatures.

EC Risk Phrase

R 11 24/25 26 37/38 41 48/22 50 68

EC Safety Phrase

S 26 28 36/37/39 45 61

UN (DOT)

1143

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.

Exposure Effects

Seizures have been observed as a terminal event in exposed rats. Chronically exposed Russian workers developed unspecified sexual disturbances, decreased androgenous function of the male endocrine glands, and menstrual disturbances.

Poison Class

2

Fire Fighting Measures

Flash Point

13

Autoignition

232

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. Extinguishing media: Use water spray to cool fire-exposed containers. Use foam, dry chemical, or carbon dioxide.

Upper exp. limit

15.5

Lower exp. limit

2.1

Fire Potential

Fire hazard when exposed to heat or flame; can react with oxidizing materials.

Accidental Release Measures

Small spills/leaks

Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Remove all sources of ignition. Use a spark-proof tool.

Stability and Reactivity

Incompatibilities

Oxidizing agents, reducing agents, bases, acids (mineral, non-oxidizing, e.g. hydrochloric acid, hydrofluoric acid, muriatic acid, phosphoric acid), acids (mineral, oxidizing, e.g. chromic acid, hypochlorous acid, nitric acid, sulfuric acid), caustics (e.g. ammonia, ammonium hydrozide, calcium hydroxide, potassium hydroxide, sodium hydroxide).

Stability

Stable under normal temperatures and pressures.

Decomposition

Carbon monoxide, carbon dioxide.

Combustion Products

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

Transport Information

UN Number

1143

Hazard Class

6.1

Packing Group

I