|MESITYL OXIDE||ICSC: 0814|
|CAS #: 141-79-7||4-Methyl-3-penten-2-one
Methyl isobutenyl ketone
| UN #: 1229
| EINECS #: 205-502-5
|ACUTE HAZARDS||PREVENTION||FIRE FIGHTING|
|FIRE & EXPLOSION||Flammable. Above 25°C explosive vapour/air mixtures may be formed.||NO open flames, NO sparks and NO smoking. Above 25°C use a closed system, ventilation and explosion-proof electrical equipment.||Use alcohol-resistant foam, powder, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water.|
|SYMPTOMS||ACUTE HAZARDS||FIRST AID|
|Inhalation||Cough. Sore throat. Shortness of breath. Headache. Dizziness. Drowsiness. Unconsciousness. Respiratory and cardiac arrest.||Use ventilation, local exhaust or breathing protection.||Fresh air, rest. Artificial respiration may be needed. Refer immediately for medical attention.|
|Skin||Dry skin. Redness. Pain.||Protective gloves. Protective clothing.||Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention .|
|Eyes||Redness. Pain.||Wear face shield 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||Abdominal cramps. Further see Inhalation.||Do not eat, drink, or smoke during work.||Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention.|
|SPILLAGE DISPOSAL||CLASSIFICATION & LABELLING|
|Personal protection: self-contained breathing apparatus. Ventilation. Do NOT let this chemical enter the environment. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.||
According to UN GHS Criteria
DANGERFlammable liquid and vapour
Harmful if swallowed
Toxic if inhaled
Causes skin and eye irritation
May cause respiratory irritation
May cause damage to organs through prolonged or repeated exposure
May be harmful if swallowed and enters airways
Harmful to aquatic life
|Fireproof. Separated from strong oxidants and acids. Do NOT store or transport in containers made from plastic or copper. Cool. Keep in the dark. Store in an area without drain or sewer access.|
|MESITYL OXIDE||ICSC: 0814|
|PHYSICAL & CHEMICAL INFORMATION|
Physical State; Appearance
Formula: C6H10O / (CH3)2C=CH-COCH3
|EXPOSURE & HEALTH EFFECTS|
Routes of exposure
Effects of short-term exposure
Effects of long-term or repeated exposure
|Occupational exposure limits|
TLV: 15 ppm as TWA; 25 ppm as STEL.
MAK: 8.1 mg/m3, 2 ppm; peak limitation category: I(2); skin absorption (H); pregnancy risk group: D
|The substance is harmful to aquatic organisms.|
|Other melting points: -59°C.
Use of alcoholic beverages enhances the harmful effect.
Depending on the degree of exposure, periodic medical examination is indicated.
Check for peroxides prior to distillation; eliminate if found.
Do NOT take working clothes home.
Symbol: Xn; R: 10-20/21/22; S: (2)-25
|All rights reserved. The published material is being distributed without warranty of any kind, either expressed or implied. Neither ILO nor WHO nor the European Commission shall be responsible for the interpretation and use of the information contained in this material.|
See Also: Toxicological Abbreviations