CAS 3209-71-0: 3-Isoxazolecarboxylic acid
Description:3-Isoxazolecarboxylic acid is a heterocyclic organic compound characterized by the presence of an isoxazole ring, which consists of a five-membered ring containing three carbon atoms, one nitrogen atom, and one oxygen atom. This compound features a carboxylic acid functional group (-COOH) attached to the isoxazole ring, which contributes to its acidic properties. It is typically a white to off-white crystalline solid and is soluble in polar solvents such as water and alcohols, owing to the presence of the carboxylic acid group. The compound is of interest in various fields, including medicinal chemistry and agrochemicals, due to its potential biological activities. Its structure allows for various chemical modifications, making it a versatile building block in organic synthesis. Additionally, 3-Isoxazolecarboxylic acid can participate in various chemical reactions, such as esterification and amidation, which further enhances its utility in synthetic chemistry. Safety data should be consulted for handling and storage, as with all chemical substances.
Formula:C4H3NO3
InChI:InChI=1S/C4H3NO3/c6-4(7)3-1-2-8-5-3/h1-2H,(H,6,7)
InChI key:InChIKey=UXYRXGFUANQKTA-UHFFFAOYSA-N
SMILES:O=C(O)C1=NOC=C1
- Synonyms:
- 3-Isoxazolecarboxylic acid
- Isoxazole-3-Carboxylic Acid
- 1,2-Oxazole-3-Carboxylic Acid
- 3-Carboxyisoxazole
- Akos Pao-1373
Brand | Product data | Purity | Price range | Estimated delivery |
---|---|---|---|---|
![]() | Isoxazole-3-carboxylic acid, 97% REF: 02-H58438CAS: 3209-71-0 | 97% | To inquire | Wed 09 Apr 25 |
![]() | 1,2-Oxazole-3-carboxylic acid REF: IN-DA003823CAS: 3209-71-0 | 96% | To inquire | Tue 15 Apr 25 |
![]() | Isoxazole-3-carboxylic acid REF: 54-OR16167CAS: 3209-71-0 | 97+% | 32.00 €~3,533.00 € | Wed 16 Apr 25 |
![]() | Isoxazole-3-carboxylic acid REF: 10-F058858CAS: 3209-71-0 | 95.0% | 24.00 €~114.00 € | Mon 21 Apr 25 |
![]() | 3-Isoxazolecarboxylic acid REF: 3D-FI56365CAS: 3209-71-0 | Min. 95% | - - - | Discontinued product |

Isoxazole-3-carboxylic acid, 97%
Ref: 02-H58438
1g | To inquire | ||
5g | To inquire |

1,2-Oxazole-3-carboxylic acid
Ref: IN-DA003823
1g | 25.00 € | ||
5g | 51.00 € | ||
10g | 70.00 € | ||
25g | 134.00 € | ||
50g | 187.00 € | ||
100g | 348.00 € | ||
500g | To inquire | ||
100mg | 27.00 € | ||
250mg | 27.00 € |

Isoxazole-3-carboxylic acid
Ref: 54-OR16167
1g | 36.00 € | ||
5g | 50.00 € | ||
25g | 212.00 € | ||
100g | 781.00 € | ||
500g | 3,533.00 € | ||
250mg | 32.00 € |

Isoxazole-3-carboxylic acid
Ref: 10-F058858
1g | 24.00 € | ||
5g | 28.00 € | ||
10g | 53.00 € | ||
25g | 114.00 € |

3-Isoxazolecarboxylic acid
Ref: 3D-FI56365
1g | Discontinued | Request information | |
2g | Discontinued | Request information | |
5g | Discontinued | Request information | |
10g | Discontinued | Request information | |
25g | Discontinued | Request information |