|CAS #: 431-03-8||Diacetyl
| UN #: 2346
| EINECS #: 207-069-8
|ACUTE HAZARDS||PREVENTION||FIRE FIGHTING|
|FIRE & EXPLOSION||Highly flammable. Vapour/air mixtures are explosive.||NO open flames, NO sparks and NO smoking. Closed system, ventilation, explosion-proof electrical equipment and lighting.||Use powder, alcohol-resistant foam, water spray, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water.|
|PREVENT GENERATION OF MISTS!|
|SYMPTOMS||ACUTE HAZARDS||FIRST AID|
|Inhalation||Cough. Drowsiness. Nausea. Headache. Sore throat.||Use ventilation, local exhaust or breathing protection.||Fresh air, rest. Refer for medical attention.|
|Skin||Redness.||Protective gloves. Protective clothing.||Remove contaminated clothes. Rinse skin with plenty of water or shower.|
|Eyes||Redness. Pain. Burns.||Wear safety goggles or eye protection in combination with breathing protection.||First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.|
|Ingestion||Sore throat.||Do not eat, drink, or smoke during work.||Rinse mouth. Give one or two glasses of water to drink. Seek medical attention if you feel unwell.|
|SPILLAGE DISPOSAL||CLASSIFICATION & LABELLING|
|Remove all ignition sources. Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Collect leaking liquid in covered containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.||
According to UN GHS Criteria
DANGERHighly flammable liquid and vapour
Harmful if swallowed
Toxic if inhaled
Causes skin irritation
Causes serious eye irritation
Causes damage to respiratory system if inhaled
Causes damage to respiratory system through prolonged or repeated exposure if inhaled
Harmful to aquatic life
|Fireproof. Store in an area without drain or sewer access. Separated from : see Chemical Dangers.|
|PHYSICAL & CHEMICAL INFORMATION|
Physical State; Appearance
Formula: CH3COCOCH3 / C4H6O2
|EXPOSURE & HEALTH EFFECTS|
Routes of exposure
Effects of short-term exposure
Effects of long-term or repeated exposure
|Occupational exposure limits|
TLV: 0.01 ppm as TWA; 0.02 ppm as STEL; A4 (not classifiable as a human carcinogen).
MAK: 0.071 mg/m3, 0.02 ppm; peak limitation category: II(1); skin absorption (H); sensitization of skin (SH); carcinogen category: 3B; pregnancy risk group: C.
EU-OEL: 0.07 mg/m3, 0.02 ppm as TWA; 0.36 mg/m3, 0.1 ppm as STEL
|The substance is harmful to aquatic organisms.|
|Irreversible obstructive lung disease has been documented among workers exposed in a variety of settings. These include 2,3-butanedione (diacetyl) production in the chemical industry, production of 2,3-butanedione (diacetyl)-containing flavorings, and production of diacetyl-containing, butter-flavored food products such as microwave popcorn. Many cases have been confirmed to have severe clinical bronchiolitis obliterans.
Environmental effects from the substance have not been investigated adequately.
Do NOT take working clothes home.
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See Also: Toxicological Abbreviations