| [Flash Point] 91 | |
| [Fire Fighting] Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire, use carbon dioxide, dry chemical, or water fog. | |
| [Fire Potential] Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. | |
| [Ingestion] Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately. | |
| [Inhalation] Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask. | |
| [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. Wash clothing before reuse. Destroy contaminated shoes. | |
| [Eyes] Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes). | |
| [Storage] Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances. Corrosives area. | |
| [Handling] Minimize dust generation and accumulation. Keep container tightly closed. Do not get on skin or in eyes. Do not ingest or inhale. Use with adequate ventilation. Discard contaminated shoes. | |
| [Ingestion] May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns. | |
| [Inhalation] Causes chemical burns to the respiratory tract. | |
| [Skin] Causes skin burns. | |
| [Eyes] Causes eye burns. | |
| [Hazards] Contact with metals may evolve flammable hydrogen gas. | |
| [EC Risk Phrase] R 34 | |
| [EC Safety Phrase] S 26 36/37/39 45 | |
| [UN (DOT)] 3261 | |
| [Personal Protection] Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin. | |
| [Respirators] A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use. | |
| [Appearance] White to pale yellow powder. | |
| [Solubility in water] Very soluble | |
| [Melting Point] 78 | |
| [Boiling Point] 203 | |
| [Vapor Pressure] 0.12 (25 C) | |
| [Density] 0.9641 g/cm3 (20C) | |
| [pKa/pKb] 2.57 (pKa) | |
| [Partition Coefficient] .85 | |
| [Heat Of Vaporization] 48.4 kJ/mol | |
| [Heat Of Combustion] -1895 kJ/mol | |
| [Product Name] 2-Butynoic acid | |
| [Synonyms] 1-Propynecarboxylic acid But-2-ynoic acid Methylacetylenecarboxylic acid Methylpropynoic acid Tetrolic acid | |
| [CAS] "CASEN_590-93-2.htm">590-93-2 | |
| [Formula] C4H4O2 | |
| [Molecular Weight] 84.07 | |
| [EINECS] 209-695-7 | |
| [Beilstein/Gmelin] 1740205 | |
| [Beilstein Reference] 4-02-00-01690 | |
| [Small spills/leaks] Vacuum or sweep up material and place into a suitable disposal container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation. | |
| [Stability] Stable at room temperature in closed containers under normal storage and handling conditions. | |
| [Incompatibilities] Strong oxidizing agents, strong reducing agents. | |
| [Decomposition] Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide. | |
| [Combustion Products] Fire may produce irritating, corrosive and/or toxic gases. | |
| [UN Number] 3261 | |
| [Hazard Class] 8 | |
| [Packing Group] I; II; III |
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