Name | 2-butynoic acid |
Synonyms | NSC 174116 but-2-ynoate TETROLIC ACID 2-butynoic acid 2-Butynoic acid 2-BUTYNOIC ACID but-2-ynoic acid BUT-2-YNOIC ACID Tetrolic acid (8CI) 3-Methylpropiolic acid 1-Propynecarboxylic acid Methylacetylenecarboxylic acid |
CAS | 590-93-2 |
EINECS | 209-695-7 |
InChI | InChI=1/C4H4O2/c1-2-3-4(5)6/h1H3,(H,5,6)/p-1 |
InChIKey | LUEHNHVFDCZTGL-UHFFFAOYSA-N |
Molecular Formula | C4H4O2 |
Molar Mass | 84.07 |
Density | 0,9641 g/cm3 |
Melting Point | 78-80 °C (lit.) |
Boling Point | 200-203°C |
Flash Point | 200-203°C |
Water Solubility | Soluble in water. Slightly soluble in methanol and chloroform. |
Solubility | water: soluble50mg/mL, clear to very slightly hazy, colorless to very faintly yellow |
Vapor Presure | 0.117mmHg at 25°C |
Appearance | White to yellow powder |
Color | White to yellow |
BRN | 1740205 |
pKa | 2.62(at 25℃) |
Storage Condition | Sealed in dry,2-8°C |
Refractive Index | 1.3918 (estimate) |
MDL | MFCD00004363 |
Use | This product is for scientific research only and shall not be used for other purposes. |
Hazard Symbols | C - Corrosive |
Risk Codes | R34 - Causes burns R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S27 - Take off immediately all contaminated clothing. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
UN IDs | UN 3261 8/PG 2 |
WGK Germany | 3 |
TSCA | Yes |
HS Code | 29161900 |
Hazard Class | 8 |
Packing Group | II |
colorless plate-like crystals, melting point about 76 °c. Boiling Point 202. 85 °c. The molar heat of combustion was 2270 J/mol. It has the dual characteristics of alkynes and carboxylic acids, and can carry out reduction, addition, oxidation, esterification and cyclization, and the formation of salts and acid chlorides.
can be used for the preparation of dibromocrotonic acid, ethoxycrotonic acid, butynic acid ethyl ester, butynyl (acid) chloride and butynyl (acid) amide.
storage and transportation according to general chemical regulations.