ChemicalBook Product Catalog Pharmaceutical intermediates Bulk Drug Intermediates 5-Methyl-4-isoxazolecarboxylic acid

5-Methyl-4-isoxazolecarboxylic acid

5-Methyl-4-isoxazolecarboxylic acid Basic information
Product Name:5-Methyl-4-isoxazolecarboxylic acid
Synonyms:5-Methyl-4-isoxazolecarboxylic acid, Tech.;5-methylisoxazole-4-carboxylic acid(SALTDATA: FREE);Methylisoxazole-4-carboxylic;LeflunoMide EP IMpurity D;4-Carboxy-5-methylisoxazole ,4-Carboxy-5-methyl-1,2-oxazole;5-Methylisoxazole-4-carboxylic acid, 99%, 99%;Leflunomide Impurity D;5-Methyl-isoxazol-4-carboxylic acid
CAS:42831-50-5
MF:C5H5NO3
MW:127.1
EINECS:700-400-1
Product Categories:Intermediates;Intermediates & Fine Chemicals;Acids and Derivatives;Heterocycles;Isoxazoles, Oxadiazoles, Oxazoles;Pharmaceuticals;Carboxylic Acids;Oxazoles, Isoxazoles & Benzoxazoles;Oxazole&Isoxazole;Organic acids;(intermediate of leflunomide);Heterocyclic Compounds;Carboxylic Acids;Oxazoles, Isoxazoles & Benzoxazoles;Building Blocks;Heterocyclic Building Blocks;Isoxazoles
Mol File:42831-50-5.mol
5-Methyl-4-isoxazolecarboxylic acid Structure
5-Methyl-4-isoxazolecarboxylic acid Chemical Properties
Melting point 144-148 °C(lit.)
Boiling point 308.3±22.0 °C(Predicted)
density 1.348±0.06 g/cm3(Predicted)
storage temp. Sealed in dry,Room Temperature
solubility DMSO (Slightly), Methanol (Slightly)
form Solid
pka2.85±0.25(Predicted)
color White to Pale Brown
BRN 116000
CAS DataBase Reference42831-50-5(CAS DataBase Reference)
Safety Information
Hazard Codes Xi,F
Risk Statements 36/37/38-37/38-36-10
Safety Statements 22-26-36/37/39-36-16
WGK Germany 3
HazardClass IRRITANT
HS Code 29349990
MSDS Information
ProviderLanguage
SigmaAldrich English
ALFA English
5-Methyl-4-isoxazolecarboxylic acid Usage And Synthesis
Chemical PropertiesCream to brown Solid
Uses5-Methylisoxazole-4-carboxylic Acid (Leflunomide EP Impurity D) is an intermediate for synthesis of Leflunomide (L322750). Herbicidal activities towards Digitaria ciliaris.
Flammability and ExplosibilityNonflammable
5-Methyl-4-isoxazolecarboxylic acid Preparation Products And Raw materials
Preparation Products4-Isoxazolecarboxamide, N-(4-aminophenyl)-5-methyl--->3-Isoxazoleaceticacid,4-cyano-5-methyl-(9CI)
methylbenzoic acid Methyl 5-METHYL-3-ISOXAZOLECARBOXYLIC ACID Bensulfuron methyl Parathion-methyl 2-(Trifluoromethyl)benzoic acid m-Toluic acid 4-(Chloromethyl)benzoic acid o-Toluic acid 4-Bromomethylbenzoic acid Kresoxim-methyl Sulfamethoxazole Thiophanate-methyl CARBOXYLIC ACID 4-(Aminomethyl)benzoic acid 5-Methyl-4-isoxazolecarboxylic acid Methyl acrylate Methyl acetate
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