2-Butynoic acid
- CAS No.
- 590-93-2
- Chemical Name:
- 2-Butynoic acid
- Synonyms
- BUT-2-YNOIC ACID;TETROLIC ACID;Butynoic acid;2-Butynoic;2-Butyl acid;2-BUTYNOIC ACID;2- butynic acid;2-Butynolc acid;2-Butynoate acid;2-Butynoicacid,98%
- CBNumber:
- CB6194374
- Molecular Formula:
- C4H4O2
- Molecular Weight:
- 84.07
- MDL Number:
- MFCD00004363
- MOL File:
- 590-93-2.mol
- MSDS File:
- SDS
| Melting point | 78-80 °C (lit.) |
|---|---|
| Boiling point | 200-203°C |
| Density | 0,9641 g/cm3 |
| refractive index | 1.3918 (estimate) |
| Flash point | 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. |
| BRN | 1740205 |
| InChI | 1S/C4H4O2/c1-2-3-4(5)6/h1H3,(H,5,6) |
| InChIKey | LUEHNHVFDCZTGL-UHFFFAOYSA-N |
| SMILES | CC#CC(O)=O |
| CAS DataBase Reference | 590-93-2(CAS DataBase Reference) |
| FDA UNII | W3AM9ANZ22 |
| NIST Chemistry Reference | 2-Butynoic acid(590-93-2) |
| EPA Substance Registry System | 2-Butynoic acid (590-93-2) |
| UNSPSC Code | 12352100 |
| NACRES | NA.22 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS05 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H314 | |||||||||
| Precautionary statements | P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363 | |||||||||
| PPE | Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges | |||||||||
| Hazard Codes | C | |||||||||
| Risk Statements | 34-20/21/22 | |||||||||
| Safety Statements | 26-27-36/37/39-45 | |||||||||
| RIDADR | UN 3261 8/PG 2 | |||||||||
| WGK Germany | 3 | |||||||||
| TSCA | TSCA listed | |||||||||
| HazardClass | 8 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 29161900 | |||||||||
| Storage Class | 8A - Combustible corrosive hazardous materials | |||||||||
| Hazard Classifications | Eye Dam. 1 Skin Corr. 1B |
|||||||||
| REACH Registrations | Active | |||||||||
| Limited Quantities | 1 Kg (2.2 lbs) (solid) | |||||||||
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml) | |||||||||
| NFPA 704 |
|
2-Butynoic acid price More Price(86)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 303666 | 2-Butynoic acid 98% | 590-93-2 | 1g | $59.7 | 2026-04-30 | Buy |
| Sigma-Aldrich | 303666 | 2-Butynoic acid 98% | 590-93-2 | 5g | $150 | 2026-04-30 | Buy |
| TCI Chemical | T1199 | Tetrolic Acid >98.0%(GC)(T) | 590-93-2 | 1g | $32 | 2026-04-30 | Buy |
| TCI Chemical | T1199 | Tetrolic Acid >98.0%(GC)(T) | 590-93-2 | 5g | $96 | 2026-04-30 | Buy |
| TRC | TRC-B809725-5G | 2-Butynoic Acid | 590-93-2 | 5g | $212 | 2026-06-03 | Buy |
2-Butynoic acid Chemical Properties, Uses, Production
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
Uses
2-Butynoic acid is used as an intermediate in organic synthesis and pharmaceuticals. It is used as a synthon in various reactions, which includes cylcoalkylation of phenols to flavones and chromones. It is involved in the cyclization of gamma-butyrolactones. It is also used in the synthesis of Z-trisubstituted olefins through μ-alkylation. It plays an important role in the preparation of chirally pure 1,2,3,4-tetrahydroisoquinoline analogs, which finds application as anti-cancer agents.
Preparation
2-Butynic acid is synthesised from propyne and carbon dioxide.
General Description
The rotational spectrum of 2-butynoic acid was measured by pulsed supersonic-jet Fourier transform microwave spectroscopy.
2-Butynoic acid Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Shanghai Rochi Pharmaceutical Co., Ltd. | 021-38751876 15000076078 | Info@rochipharma.com | China | 616 | 55 |
| Shanghai Biobond Pharmaceutical Co.,Ltd. | 21-68719686 18917373795; | sales@sh-biobond.cn | China | 94 | 58 |
| Hangzhou Chemtrue Bio-Tech Co.,Ltd. | 19967494293 | sales@chemtrue-bio.com | China | 303 | 58 |
| Shanghai Ruiyi Pharmaceutical Technology Co., Ltd | 021-54711706 | sales5@ruiyitech.com | China | 225 | 58 |
| Shanghai Toplab Chemical Co., Ltd. | 021-31137757-00; 18121466954;18121466954 | 28328681@qq.com | China | 184 | 55 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| INTATRADE GmbH | +49 3493/605464 | sales@intatrade.de | Germany | 3563 | 66 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
| TCI (Shanghai) Development Co., Ltd. | 021-67121386 | Sales-CN@TCIchemicals.com | China | 24512 | 81 |
Related articles
- Synthesis and Thermal Stability of 2-Butynoic acid
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- Feb 2,2026
View Latest Price from 2-Butynoic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-02 | 2-Butynoic acid
590-93-2
|
$5.00 | 1KG | 98% | Henan Fengda Chemical Co., Ltd | ||
 |
2026-06-30 | 2-Butynoic acid
590-93-2
|
1kg | 99% | 10000KGS | Shaanxi Dideu New Materials Co. Ltd | ||
 |
2026-05-28 | 2-Butynoic acid
590-93-2
|
$9.00 | 1KG | 99.9 | 1 ton | Hebei Chuanghai Biotechnology Co,.LTD |
-
- 2-Butynoic acid
590-93-2
- $5.00
- 98%
- Henan Fengda Chemical Co., Ltd
-
- 2-Butynoic acid
590-93-2
- $0.00
- 99%
- Shaanxi Dideu New Materials Co. Ltd
-
- 2-Butynoic acid
590-93-2
- $9.00
- 99.9
- Hebei Chuanghai Biotechnology Co,.LTD
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