| Identification | More | [Name]
2-Butynoic acid | [CAS]
590-93-2 | [Synonyms]
2-BUTYNOIC ACID
BUT-2-YNOIC ACID
TETROLIC ACID
1-Propynecarboxylic acid
3-Methylpropiolic acid
2-Butynoicacid,98%
2-BUTYNOIC ACID 98%
Methylacetylenecarboxylic acid
Methylpropynoic acid
Butynoic acid
Methylpropiolic acid | [EINECS(EC#)]
209-695-7 | [Molecular Formula]
C4H4O2 | [MDL Number]
MFCD00004363 | [Molecular Weight]
84.07 | [MOL File]
590-93-2.mol |
| Chemical Properties | Back Directory | [Appearance]
white to yellow powder | [Melting point ]
78-80 °C (lit.) | [Boiling point ]
200-203°C | [density ]
0,9641 g/cm3 | [refractive index ]
1.3918 (estimate) | [Fp ]
200-203°C | [storage temp. ]
Sealed in dry,2-8°C | [solubility ]
water: soluble50mg/mL, clear to very slightly hazy, colorless to very faintly yellow | [form ]
Powder | [pka]
2.62(at 25℃) | [color ]
White to yellow | [Water Solubility ]
Soluble in water. Slightly soluble in methanol and chloroform. | [Detection Methods]
T,NMR | [BRN ]
1740205 | [InChIKey]
LUEHNHVFDCZTGL-UHFFFAOYSA-N | [CAS DataBase Reference]
590-93-2(CAS DataBase Reference) | [NIST Chemistry Reference]
2-Butynoic acid(590-93-2) | [EPA Substance Registry System]
590-93-2(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
C | [Risk Statements ]
R34:Causes burns.
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed . | [Safety Statements ]
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 label where possible) . | [RIDADR ]
UN 3261 8/PG 2
| [WGK Germany ]
3
| [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
II | [HS Code ]
29161900 |
| Hazard Information | Back Directory | [Chemical Properties]
white to yellow powder | [Uses]
Synthon employed in a variety of reactions, including cycloacylation of phenols to flavones and chromones,1 and cyclization to γ-butyrolactones.2 | [General Description]
The rotational spectrum of 2-butynoic acid was measured by pulsed supersonic-jet Fourier transform microwave spectroscopy. |
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