2345-51-9
3-butynoic acid
CAS: 2345-51-9
Molecular Formula: C4H4O2
2345-51-9 - Names and Identifiers
| Name | 3-butynoic acid |
| Synonyms | CHequivCCH2COOH 3-Bytynoic Acid 3-butynoic acid But-3-ynoic acid but-3-ynoic acid Ethynylacetic acid 2-Ethynylacetic acid |
| CAS | 2345-51-9 |
| InChI | InChI=1/C4H4O2/c1-2-3-4(5)6/h1H,3H2,(H,5,6) |
| InChIKey | KKAHGSQLSTUDAV-UHFFFAOYSA-N |
2345-51-9 - Physico-chemical Properties
| Molecular Formula | C4H4O2 |
| Molar Mass | 84.07 |
| Density | 1.152 |
| Melting Point | 188-195℃ |
| Boling Point | 195℃ |
| Flash Point | 83℃ |
| Vapor Presure | 0.186mmHg at 25°C |
| Appearance | powder to crystal |
| Color | White to Almost white |
| Maximum wavelength(λmax) | ['228nm(CH2Cl2)(lit.)'] |
| pKa | 3.62±0.10(Predicted) |
| Storage Condition | Keep in dark place,Inert atmosphere,Store in freezer, under -20°C |
| Refractive Index | 1.46 |
2345-51-9 - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R41 - Risk of serious damage to eyes R34 - Causes burns R24/25 - |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| UN IDs | 2923 |
| WGK Germany | 3 |
| HS Code | 29161900 |
| Hazard Class | 8 |
| Packing Group | Ⅱ |
2345-51-9 - Introduction
3-butynoic acid(3-butynoic acid) is an organic compound with the chemical formula C4H4O2. The following is a description of its nature, use, preparation and safety information:
1. Nature:
-Appearance: 3-butynoic acid is a colorless to yellow liquid with a pungent odor.
-Solubility: The compound is soluble in organic solvents such as water, ethanol and ether.
-Stability: 3-butynoic acid is stable in the air, but it will decompose under the action of light and heat.
2. Use:
-Synthesis Intermediates: 3-butynoic acid can be used to synthesize other compounds such as esters, amides and alcohols.
-Catalyst: It can also be used as a ligand for metal catalysts.
3. Preparation method:
- 3-butynoic acid can be obtained by the reaction of butyne and carbon dioxide. Under the reaction conditions, butyne reacts with carbon dioxide in alkaline solution to produce 3-butynoic acid.
4. Safety Information:
- 3-butynoic acid is irritating and may cause irritation to the eyes, skin and respiratory tract. Wear appropriate personal protective equipment such as gloves, goggles and protective clothing during use.
-If ingested or inhaled, seek medical attention immediately and bring the compound's label or container to a doctor's review.
1. Nature:
-Appearance: 3-butynoic acid is a colorless to yellow liquid with a pungent odor.
-Solubility: The compound is soluble in organic solvents such as water, ethanol and ether.
-Stability: 3-butynoic acid is stable in the air, but it will decompose under the action of light and heat.
2. Use:
-Synthesis Intermediates: 3-butynoic acid can be used to synthesize other compounds such as esters, amides and alcohols.
-Catalyst: It can also be used as a ligand for metal catalysts.
3. Preparation method:
- 3-butynoic acid can be obtained by the reaction of butyne and carbon dioxide. Under the reaction conditions, butyne reacts with carbon dioxide in alkaline solution to produce 3-butynoic acid.
4. Safety Information:
- 3-butynoic acid is irritating and may cause irritation to the eyes, skin and respiratory tract. Wear appropriate personal protective equipment such as gloves, goggles and protective clothing during use.
-If ingested or inhaled, seek medical attention immediately and bring the compound's label or container to a doctor's review.
Last Update：2024-04-10 22:29:15
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