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ChemicalBook >> CAS DataBase List >> 2-Butynoic acid

2-Butynoic acid

2-Butynoic acid price.
  • $6 - $3176.25
  • Product name: 2-Butynoic acid
  • CAS: 590-93-2
  • MF: C4H4O2
  • MW: 84.07
  • EINECS:209-695-7
  • MDL Number:MFCD00004363
  • Synonyms:1-Propynecarboxylic acid;3-Methylpropiolic acid;2-BUTYNOIC ACID;2-Butynoicacid,98%;2-BUTYNOIC ACID 98%;Methylacetylenecarboxylic acid;Methylpropynoic acid;Methylpropiolic acid
Price86 Properties Safety Information Description
86 prices
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  • Manufactureraablocks
  • Product numberAA0036YK
  • Product description2-Butynoic acid 98%
  • Packaging1g
  • Price$8
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA0036YK
  • Product description2-Butynoic acid 95%
  • Packaging5g
  • Price$10
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA0036YK
  • Product description2-Butynoic acid 95%
  • Packaging10g
  • Price$13
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA0036YK
  • Product description2-Butynoic acid 98%
  • Packaging25g
  • Price$21
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA0036YK
  • Product description2-Butynoic acid 98%
  • Packaging50g
  • Price$40
  • Updated2026-05-28
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  • Manufactureraablocks
  • Product numberAA0036YK
  • Product description2-Butynoic acid 98%
  • Packaging100g
  • Price$72
  • Updated2026-05-28
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  • ManufacturerAcrotein
  • Product numberAC-5967
  • Product description2-Butynoic acid 97%
  • Packaging25g
  • Price$130.16
  • Updated2026-05-25
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  • ManufacturerAcrotein
  • Product numberAC-5967
  • Product description2-Butynoic acid 97%
  • Packaging5g
  • Price$32.81
  • Updated2026-05-25
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  • ManufacturerAcrotein
  • Product numberAC-5967
  • Product description2-Butynoic acid 97%
  • Packaging100g
  • Price$444.21
  • Updated2026-05-25
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  • ManufacturerActivate Scientific
  • Product numberAS102663
  • Product description2-Butynoic acid 98%
  • Packaging100g
  • Price$732
  • Updated2021-12-16
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  • ManufacturerActivate Scientific
  • Product numberAS102663
  • Product description2-Butynoic acid 98%
  • Packaging5G
  • Price$52
  • Updated2021-12-16
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  • ManufacturerActivate Scientific
  • Product numberAS102663
  • Product description2-Butynoic acid 98%
  • Packaging1g
  • Price$22
  • Updated2021-12-16
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  • ManufacturerActivate Scientific
  • Product numberAS102663
  • Product description2-Butynoic acid 98%
  • Packaging25g
  • Price$223
  • Updated2021-12-16
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  • ManufacturerAHH
  • Product numberMT-04276
  • Product description2-Butynoic acid 97%
  • Packaging100g
  • Price$585
  • Updated2026-05-26
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  • ManufacturerAK Scientific
  • Product numberL220
  • Product description2-Butynoic acid
  • Packaging4x25g
  • Price$661
  • Updated2021-12-16
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  • ManufacturerAK Scientific
  • Product numberJ91442
  • Product description2-Butynoic acid 98%
  • Packaging100g
  • Price$280
  • Updated2026-06-04
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Manufacturer Product number Product description Packaging Price Updated Buy
aablocks AA0036YK 2-Butynoic acid 98% 1g $8 2026-05-28 Buy
aablocks AA0036YK 2-Butynoic acid 95% 5g $10 2026-05-28 Buy
aablocks AA0036YK 2-Butynoic acid 95% 10g $13 2026-05-28 Buy
aablocks AA0036YK 2-Butynoic acid 98% 25g $21 2026-05-28 Buy
aablocks AA0036YK 2-Butynoic acid 98% 50g $40 2026-05-28 Buy
aablocks AA0036YK 2-Butynoic acid 98% 100g $72 2026-05-28 Buy
Acrotein AC-5967 2-Butynoic acid 97% 25g $130.16 2026-05-25 Buy
Acrotein AC-5967 2-Butynoic acid 97% 5g $32.81 2026-05-25 Buy
Acrotein AC-5967 2-Butynoic acid 97% 100g $444.21 2026-05-25 Buy
Activate Scientific AS102663 2-Butynoic acid 98% 100g $732 2021-12-16 Buy
Activate Scientific AS102663 2-Butynoic acid 98% 5G $52 2021-12-16 Buy
Activate Scientific AS102663 2-Butynoic acid 98% 1g $22 2021-12-16 Buy
Activate Scientific AS102663 2-Butynoic acid 98% 25g $223 2021-12-16 Buy
AHH MT-04276 2-Butynoic acid 97% 100g $585 2026-05-26 Buy
AK Scientific L220 2-Butynoic acid 4x25g $661 2021-12-16 Buy
AK Scientific J91442 2-Butynoic acid 98% 100g $280 2026-06-04 Buy
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Properties

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)
NIST Chemistry Reference :2-Butynoic acid(590-93-2)
EPA Substance Registry System :2-Butynoic acid (590-93-2)

Safety Information

Symbol(GHS): Corrosion (GHS05)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
Precautionary statements:
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P363 Wash contaminated clothing before reuse.

Description

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.

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Suppliers and manufacturers

Shanghai Rochi Pharmaceutical Co., Ltd. Shanghai Biobond Pharmaceutical Co.,Ltd. Hangzhou Chemtrue Bio-Tech Co.,Ltd. Shanghai Ruiyi Pharmaceutical Technology Co., Ltd Shanghai Toplab Chemical Co., Ltd. J & K SCIENTIFIC LTD. Meryer (Shanghai) Chemical Technology Co., Ltd. INTATRADE GmbH Alfa Aesar TCI (Shanghai) Development Co., Ltd.