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4-Methylisoxazole-5-carboxylic acid

4-Methylisoxazole-5-carboxylic acid Structure
4-Methylisoxazole-5-carboxylic acid structure
CAS No.
261350-46-3
Chemical Name:
4-Methylisoxazole-5-carboxylic acid
Synonyms
5-Carboxy-4-methylisoxazole;4-Methylisoxazole-5-carboxylic acid;4-Methyl-5-isoxazolecarboxylic acid;5-Isoxazolecarboxylic acid, 4-methyl-;4-Methylisoxazole-5-carboxylicacid95%;4-Methyl-1,2-oxazole-5-carboxylic acid;5-Carboxy-4-methylisoxazole, 4-Methyl-1,2-oxazole-5-carboxylic acid
CBNumber:
CB21481950
Molecular Formula:
C5H5NO3
Molecular Weight:
127.1
MDL Number:
MFCD08235209
MOL File:
261350-46-3.mol
MSDS File:
SDS
Last updated:2026-08-04 14:10:54
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4-Methylisoxazole-5-carboxylic acid Properties

Boiling point 310 ºC
Density 1.348
Flash point 141 ºC
storage temp. 2-8°C(protect from light)
pka 1.72±0.37(Predicted)
form solid
color Brown
InChI 1S/C5H5NO3/c1-3-2-6-9-4(3)5(7)8/h2H,1H3,(H,7,8)
InChIKey RITPLLYUVXGBFT-UHFFFAOYSA-N
SMILES Cc1cnoc1C(O)=O
UNSPSC Code 12352106
NACRES NA.21

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H302-H315-H319-H335
Precautionary statements  P261-P305+P351+P338
target organs Respiratory system
WGK Germany  WGK 3
HS Code  2934999090
Storage Class 11 - Combustible Solids
Hazard Classifications Acute Tox. 4 Oral
Eye Irrit. 2
Skin Irrit. 2
STOT SE 3

4-Methylisoxazole-5-carboxylic acid price More Price(35)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Activate Scientific AS45484 4-Methylisoxazole-5-carboxylic acid 96% 261350-46-3 1g $171 2026-06-04 Buy
Activate Scientific AS45484 4-Methylisoxazole-5-carboxylic acid 96% 261350-46-3 5g $823 2026-06-04 Buy
Matrix Scientific 082599 4-Methylisoxazole-5-carboxylic acid 261350-46-3 250.00mg $73 2026-05-18 Buy
Matrix Scientific 082599 4-Methylisoxazole-5-carboxylic acid 261350-46-3 1.00g $183 2026-05-18 Buy
Matrix Scientific 082599 4-Methylisoxazole-5-carboxylic acid 261350-46-3 5.00g $896 2026-05-18 Buy
Product number Packaging Price Buy
AS45484 1g $171 Buy
AS45484 5g $823 Buy
082599 250.00mg $73 Buy
082599 1.00g $183 Buy
082599 5.00g $896 Buy

4-Methylisoxazole-5-carboxylic acid Preparation Products And Raw materials

Raw materials

Preparation Products

4-Methylisoxazole-5-carboxylic acid Suppliers

Global( 83)Suppliers
Supplier Tel Email Country ProdList Advantage
J & K SCIENTIFIC LTD. 18210857532 18210857532 jkinfo@jkchemical.com China 96815 76
Shanghai Longsheng chemical Co.,Ltd. 58099637 13585536065 sales@shlschem.com China 9880 59
China Langchem Inc. 0086-21-58956006 China 7798 57
Shanghai Sunway Pharmaceutical Technology Co., Ltd 13761987713 hxzheng@sunwaypharm.cn China 8663 57
Atop-Pharma (Shanghai) Technology Co., Ltd. +86 (21) 5196-9732 China 996 57
Shanghai Xiannuo Biotechnology Co., Ltd. 021-50718719 13918719472 China 978 58
Nanjing Norris-Pharm Technology Co., Ltd 13901585132 sales@norris-pharm.com China 8869 55
HBCChem, Inc. +1-510-219-6317 sales@hbcchem.com United States 10628 60
Bide Pharmatech Ltd. 400-164-7117 18317119277 product02@bidepharm.com China 40000 60
Hangzhou J&H Chemical Co., Ltd. 0571-87396432 sales@jhechem.com China 14905 59
Supplier Advantage
J & K SCIENTIFIC LTD. 76
Shanghai Longsheng chemical Co.,Ltd. 59
China Langchem Inc. 57
Shanghai Sunway Pharmaceutical Technology Co., Ltd 57
Atop-Pharma (Shanghai) Technology Co., Ltd. 57
Shanghai Xiannuo Biotechnology Co., Ltd. 58
Nanjing Norris-Pharm Technology Co., Ltd 55
HBCChem, Inc. 60
Bide Pharmatech Ltd. 60
Hangzhou J&H Chemical Co., Ltd. 59

View Lastest Price from 4-Methylisoxazole-5-carboxylic acid manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
4-Methylisoxazole-5-carboxylic acid pictures 2026-08-04 4-Methylisoxazole-5-carboxylic acid
261350-46-3
 1KG 98% 1000kg Shaanxi Dideu New Materials Co. Ltd

4-Methylisoxazole-5-carboxylic acid Spectrum

4-Methylisoxazole-5-carboxylic acid(261350-46-3)1HNMR

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4-Methylisoxazole-5-carboxylic acid 5-Carboxy-4-methylisoxazole 4-Methyl-1,2-oxazole-5-carboxylic acid 4-Methyl-5-isoxazolecarboxylic acid 5-Carboxy-4-methylisoxazole, 4-Methyl-1,2-oxazole-5-carboxylic acid 4-Methylisoxazole-5-carboxylicacid95% 5-Isoxazolecarboxylic acid, 4-methyl- 261350-46-3