Impurity Reference Standard - Products

Leflunomide

CAT No: CL-LFMD-01 CAS No: 75706-12-6 Mol Wt: 270.2 Mol F: C12H9F3N2O2 Inv Status: Custom Synthesis

Chemical Name: 5-Methyl-N-(4-(trifluoromethyl)phenyl)isoxazole-4-carboxamide

Leflunomide EP Impurity A

CAT No: CL-LFMD-02 CAS No: 455-14-1 Mol Wt: 161.1 Mol F: C7H6F3N Inv Status: In Stock

Chemical Name: 4-(Trifluoromethyl)aniline

4-(Trifluoromethyl)aniline

CAT No: CL-LFMD-03 CAS No: 163451-81-8 Mol Wt: 270.2 Mol F: C12H9F3N2O2 Inv Status: Custom Synthesis

Chemical Name: 4-(Trifluoromethyl)anilinium Chloride

Leflunomide EP Impurity C

CAT No: CL-LFMD-04 CAS No: 61643-23-0 Mol Wt: 270.2 Mol F: C12H9F3N2O2 Inv Status: Custom Synthesis

Chemical Name: 5-Methyl-N-(3-(trifluoromethyl)phenyl)isoxazole-4-carboxamide

Leflunomide EP Impurity D

CAT No: CL-LFMD-05 CAS No: 42831-50-5 Mol Wt: 127.1 Mol F: C5H5NO3 Inv Status: Custom Synthesis

Chemical Name: 5-Methylisoxazole-4-carboxylic acid

Leflunomide EP Impurity E

CAT No: CL-LFMD-06 CAS No: 208401-20-1 Mol Wt: 270.2 Mol F: C12H9F3N2O2 Inv Status: Custom Synthesis

Chemical Name: 3-Methyl-N-(4-(trifluoromethyl)phenyl)isoxazole-4-carboxamide

Leflunomide EP Impurity F

CAT No: CL-LFMD-07 CAS No: 1403564-06-6 Mol Wt: 270.2 Mol F: C12H9F3N2O2 Inv Status: Custom Synthesis

Chemical Name: 5-Methyl-N-(2-(trifluoromethyl)phenyl)isoxazole-4-carboxamide

Leflunomide EP Impurity G

CAT No: CL-LFMD-08 CAS No: 724429-16-7 Mol Wt: 216.2 Mol F: C12H12N2O2 Inv Status: Custom Synthesis

Chemical Name: 5-Methyl-N-(p-tolyl)isoxazole-4-carboxamide

Leflunomide EP Impurity H

CAT No: CL-LFMD-09 CAS No: 24522-30-3 Mol Wt: 228.2 Mol F: C10H7F3N2O Inv Status: Custom Synthesis

Chemical Name: 2-Cyano-N-(4-(trifluoromethyl)phenyl)acetamide

Leflunomide Metabolite Ethyl Analog

CAT No: CL-LFMD-10 CAS No: 2734292-21-6 Mol Wt: 284.2 Mol F: C13H11F3N2O2 Inv Status: Custom Synthesis

Chemical Name: (Z)-2-Cyano-3-hydroxy-N-(4-(trifluoromethyl)phenyl)pent-2-enamide

Leflunomide Related Compound (Methyl 5-Methyl-1,2-Oxazole-3-Carboxylate)

CAT No: CL-LFMD-11 CAS No: 19788-35-3 Mol Wt: 141.1 Mol F: C6H7NO3 Inv Status: Custom Synthesis

Chemical Name: Methyl 5-methyl-1,2-oxazole-3-carboxylate

Leflunomide Impurity 1

CAT No: CL-LFMD-12 CAS No: 419534-37-5 Mol Wt: 228.2 Mol F: C10H7F3N2O Inv Status: Custom Synthesis

Chemical Name: 2-?Cyano-?N-?[2-?(trifluoromethyl)?phenyl]?acetamide

Leflunomide Impurity 2

CAT No: CL-LFMD-13 CAS No: 17153-20-7 Mol Wt: 127.1 Mol F: C5H5NO3 Inv Status: Custom Synthesis

Chemical Name: 3-Methylisoxazole-4-carboxylic Acid

Leflunomide Impurity 3

CAT No: CL-LFMD-14 CAS No: 2772495-33-5 Mol Wt: 389.3 Mol F: C19H14F3N3O3 Inv Status: Custom Synthesis

Chemical Name: 5-Methyl-N-(4-((4-(trifluoromethyl)phenyl)carbamoyl)phenyl)isoxazole-4-carboxamide

3-Trifluoro Isomer

CAT No: CL-LFMD-15 CAS No: 63927-52-6 Mol Wt: 270.2 Mol F: C12H9F3N2O2 Inv Status: Custom Synthesis

Chemical Name: (Z)-2-cyano-3-hydroxy-N-(3-(trifluoromethyl)phenyl)but-2-enamide

3-Methylisoxazole-4-Carboxylic Acid Ethyl Ester

CAT No: CL-LFMD-16 CAS No: 20328-15-8 Mol Wt: 155.2 Mol F: C7H9NO3 Inv Status: Custom Synthesis

Chemical Name: Ethyl 3-methylisoxazole-4-carboxylate

Teriflunomide-E Isomer

CAT No: CL-LFMD-18 CAS No: 108605-62-5 Mol Wt: 270.2 Mol F: C12H9F3N2O2 Inv Status: Custom Synthesis

Chemical Name: (E)-2-Cyano-3-hydroxy-N-(4-(trifluoromethyl)phenyl)but-2-enamide

5-Methylisoxazole-3-Carboxylic-d4 Acid

CAT No: CL-LFMD-19 CAS No: 1267623-84-6 Mol Wt: 131.1 Mol F: C5HD4NO3 Inv Status: Custom Synthesis

Chemical Name: 5-(Methyl-d3)isoxazole-3-carboxylic-4-d acid

Leflunomide D4

CAT No: CL-LFMD-20 CAS No: 1189987-23-2 Mol Wt: 274.3 Mol F: C12H5D4F3N2O2 Inv Status: Custom Synthesis

Chemical Name: 5-Methyl-N-(4-(trifluoromethyl)phenyl-2,3,5,6-d4)isoxazole-4-carboxamide

Type:Impurity Reference Standard

API NAME:Leflunomide

Total Products: 19

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