Impurity Reference Standard - Products

Febuxostat

CAT No: CL-FBXT-01 CAS No: 144060-53-7 Mol Wt: 316.4 Mol F: C16H16N2O3S Inv Status: In Stock

Chemical Name: 2-[3-Cyano-4-(2-methylpropoxy)phenyl]-4-methylthiazole-5-carboxylic acid

Febuxostat 4-Hydroxy Ethyl Ester Impurity

CAT No: CL-FBXT-02 CAS No: 161798-02-3 Mol Wt: 288.32 Mol F: C14H12N2O3S Inv Status: In Stock

Chemical Name: Ethyl 2-(3-cyano-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate

Febuxostat 4-Hydroxy Acid Impurity

CAT No: CL-FBXT-03 CAS No: 407582-48-3 Mol Wt: 260.3 Mol F: C12H8N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-(3-Cyano-4-hydroxyphenyl)-4-methyl-1,3-thiazole-5-carboxylic acid

Febuxostat Acyl-B-D-Glucuronide

CAT No: CL-FBXT-04 CAS No: 1351692-92-6 Mol Wt: 492.5 Mol F: C22H24N2O9S Inv Status: Custom Synthesis

Chemical Name: beta-D-Glucopyranuronic acid,1-[2-[3-cyano-4-(2-methylpropoxy)phenyl]-4-methyl-5-thiazolecarboxylate]

Febuxostat Amide Impurity

CAT No: CL-FBXT-05 CAS No: 1239233-86-3 Mol Wt: 334.39 Mol F: C16H18N2O4S Inv Status: In Stock

Chemical Name: 2-(3-carbamoyl-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid

Febuxostat Bromo Impurity

CAT No: CL-FBXT-06 CAS No: 144060-40-2 Mol Wt: 370.3 Mol F: C15H16BrNO3S Inv Status: Custom Synthesis

Chemical Name: 2-[3-Bromo-4-(2-methylpropoxy)phenyl]-4-methylthiazole-5-carboxylic acid

Febuxostat Butyl Ether Analog

CAT No: CL-FBXT-07 CAS No: 1657014-33-9 Mol Wt: 316.4 Mol F: C16H16N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-[3-Cyano-4-(butyloxy)phenyl]-4-methylthiazole-5-carboxylic acid

Febuxostat Descarboxy Impurity

CAT No: CL-FBXT-08 CAS No: 1335202-60-2 Mol Wt: 272.4 Mol F: C15H16N2OS Inv Status: Custom Synthesis

Chemical Name: 2-Isobutoxy-5-(4-methylthiazol-2-yl) benzonitrile

Febuxostat Descyano Ethyl Ester

CAT No: CL-FBXT-09 CAS No: 144060-97-9 Mol Wt: 319.42 Mol F: C17H21NO3S Inv Status: In Stock

Chemical Name: 2-(4-Isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid ethyl ester

Febuxostat Descyano Hydroxy Ethyl Ester Impurity

CAT No: CL-FBXT-10 CAS No: 161797-99-5 Mol Wt: 263.31 Mol F: C13H13NO3S Inv Status: In Stock

Chemical Name: 2-(4-Hydroxyphenyl)-4-methylthiazole-5-carboxylic Acid Ethyl Ester

Febuxostat Descyano Hydroxy Impurity

CAT No: CL-FBXT-11 CAS No: 886501-78-6 Mol Wt: 235.26 Mol F: C11H9NO3S Inv Status: In Stock

Chemical Name: 2-(4-Hydroxyphenyl)-4-methylthiazole-5-carboxylic acid

Febuxostat Descyano Impurity

CAT No: CL-FBXT-12 CAS No: 1206550-99-3 Mol Wt: 291.37 Mol F: C17H15NO3S Inv Status: In Stock

Chemical Name: 2-(4-Isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid

Febuxostat Dicarboxylic Acid Impurity

CAT No: CL-FBXT-13 CAS No: 1239233-87-4 Mol Wt: 335.37 Mol F: C16H17NO5S Inv Status: In Stock

Chemical Name: 2-[3-Carboxy-4-(2-methylpropoxy)phenyl]-4-methyl-5-thiazolecarboxylic acid

Febuxostat Dimethylthiazole Ethyl Ester Impurity

CAT No: CL-FBXT-14 CAS No: 7210-77-7 Mol Wt: 185.2 Mol F: C8H11NO2S Inv Status: Custom Synthesis

Chemical Name: Ethyl 2,4-dimethylthiazole-5-carboxylate

Febuxostat Dithiazole Acid Impurity

CAT No: CL-FBXT-15 CAS No: 1330632-48-8 Mol Wt: 432.5 Mol F: C20H20N2O5S2 Inv Status: Custom Synthesis

Chemical Name: 2,2?4-Isobutoxy-1,3-phenylene)bis(4-methylthiazole-5-carboxylic acid)

Febuxostat Ethyl Ester

CAT No: CL-FBXT-16 CAS No: 160844-75-7 Mol Wt: 328.43 Mol F: C18H20N2O2S Inv Status: In Stock

Chemical Name: 2-isobutoxy-5-(4-methyl-5-propionylthiazol-2-yl)benzonitrile

Febuxostat Isopropyl Ester

CAT No: CL-FBXT-17 CAS No: 1346238-10-5 Mol Wt: 358.5 Mol F: C19H22N2O3S Inv Status: Custom Synthesis

Chemical Name: Isopropyl 2-(3-cyano-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylate

Febuxostat Isopropyl Ether Analog

CAT No: CL-FBXT-18 CAS No: 144060-52-6 Mol Wt: 302.4 Mol F: C15H14N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-[3-Cyano-4-(isopropyloxy)phenyl]-4-methylthiazole-5-carboxylic acid

Febuxostat Methyl Ester

CAT No: CL-FBXT-19 CAS No: 923942-34-1 Mol Wt: 330.4 Mol F: C17H18N2O3S Inv Status: Custom Synthesis

Chemical Name: Methyl 2-(3-cyano-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylate

Febuxostat N-Propyl Ether Acid Impurity

CAT No: CL-FBXT-20 CAS No: 1530308-87-2 Mol Wt: 302.4 Mol F: C15H14N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-(3-Cyano-4-propoxyphenyl)-4-methylthiazole-5-carboxylic acid (as per USP)

Febuxostat Sec-Butyl Ether Acid Impurity

CAT No: CL-FBXT-21 CAS No: 1335202-59-9 Mol Wt: 316 Mol F: C16H16N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-[4-(Sec-Butoxy)-3-cyanophenyl]-4-methylthiazole-5-carboxylic acid (as per USP)

Febuxostat T-Butyl Ether Acid Impurity

CAT No: CL-FBXT-22 CAS No: 2418591-43-0 Mol Wt: 316.4 Mol F: C16H16N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-(4-t-Butoxy-3-cyanophenyl)-4-methylthiazole-5-carboxylic acid

Febuxostat Impurity (4-Isobutoxy Benzene-1,3-Bis(Carbothio Amide))

CAT No: CL-FBXT-23 CAS No: 1330632-46-6 Mol Wt: 268.4 Mol F: C12H16N2OS2 Inv Status: Custom Synthesis

Chemical Name: (4-Isobutoxy benzene-1,3-bis(carbothio amide))

Febuxostat Impurity 3

CAT No: CL-FBXT-24 CAS No: 1330632-47-7 Mol Wt: 460.4 Mol F: C22H24N2O5S2 Inv Status: Custom Synthesis

Chemical Name: (Dimethyl 2,2'-(4-isobutoxy-1,3-phenylene)bis(4-methylthiazole-5-carboxylate))

Febuxostat Impurity 1

CAT No: CL-FBXT-25 CAS No: 161798-01-2 Mol Wt: 291.32 Mol F: C14H13NO4S Inv Status: In Stock

Chemical Name: Ethyl 2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate

Febuxostat Impurity 2

CAT No: CL-FBXT-26 CAS No: 161798-03-4 Mol Wt: 347.43 Mol F: C18H21NO4S Inv Status: In Stock

Chemical Name: Ethyl 2-(3-formyl-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylate

Febuxostat Impurity 6

CAT No: CL-FBXT-27 CAS No: 1271738-74-9 Mol Wt: 362.5 Mol F: C18H22N2O4S Inv Status: Custom Synthesis

Chemical Name: Ethyl (E)-2-(3-((hydroxyimino)methyl)-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylate

Febuxostat Impurity 7

CAT No: CL-FBXT-28 CAS No: NA Mol Wt: 334.4 Mol F: C16H18N2O4S Inv Status: Custom Synthesis

Chemical Name: (E)-2-(3-((hydroxyimino)methyl)-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid

Febuxostat Impurity 8

CAT No: CL-FBXT-29 CAS No: 144060-62-8 Mol Wt: 319.4 Mol F: C16H17NO4S Inv Status: Custom Synthesis

Chemical Name: 2-(3-Formyl-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid

Febuxostat Impurity 9

CAT No: CL-FBXT-30 CAS No: 407582-48-3 Mol Wt: 260.27 Mol F: C12H8N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-(3-cyano-4-hydroxyphenyl)-4-methylthiazole-5-carboxylic acid

Febuxostat Impurity 10

CAT No: CL-FBXT-31 CAS No: NA Mol Wt: 332.4 Mol F: C16H16N2O4S Inv Status: Custom Synthesis

Chemical Name: 2-(4-Isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid 1-oxide

Febuxostat Impurity 11

CAT No: CL-FBXT-32 CAS No: 31643-49-9 Mol Wt: 173.1 Mol F: C8H3N3O2 Inv Status: Custom Synthesis

Chemical Name: 4-Nitrophthalonitrile

Febuxostat Impurity 12

CAT No: CL-FBXT-33 CAS No: NA Mol Wt: 198.1 Mol F: C9H2N4O2 Inv Status: Custom Synthesis

Chemical Name: 2-Nitrobenzene-1,3,5-tricarbonitrile

Febuxostat Impurity 13

CAT No: CL-FBXT-34 CAS No: NA Mol Wt: 636.8 Mol F: C32H36N4O6S2 Inv Status: Custom Synthesis

Chemical Name: 3,8-Diamino-24,74-diisobutoxy-14,64-dimethyl-4,9-dioxa-1(2,5),6(5,2)-dithiazola-2,7(1,3)-dibenzenacyclodecaphane-5,10-dione

Febuxostat Impurity 14

CAT No: CL-FBXT-35 CAS No: 1335202-60-2 Mol Wt: 272.4 Mol F: C15H16N2OS Inv Status: Custom Synthesis

Chemical Name: 2-(2-methylpropoxy)-5-(4-methyl-1,3-thiazol-2-yl)benzonitrile

Febuxostat Impurity 15

CAT No: CL-FBXT-36 CAS No: NA Mol Wt: 302.4 Mol F: C15H14N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-(4-Butoxy-3-cyanophenyl)thiazole-5-carboxylic acid

Febuxostat Impurity 16

CAT No: CL-FBXT-37 CAS No: NA Mol Wt: 302.4 Mol F: C15H14N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-(4-(Sec-butoxy)-3-cyanophenyl)thiazole-5-carboxylic acid

Febuxostat Impurity 17

CAT No: CL-FBXT-38 CAS No: NA Mol Wt: 288.3 Mol F: C14H12N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-(3-Cyano-4-propoxyphenyl)thiazole-5-carboxylic acid

Febuxostat Impurity 18

CAT No: CL-FBXT-39 CAS No: NA Mol Wt: 273.3 Mol F: C15H15NO4 Inv Status: Custom Synthesis

Chemical Name: Ethyl 2-(4-hydroxy-3-vinylphenyl)-4-methyloxazole-5-carboxylate

Febuxostat Impurity 19

CAT No: CL-FBXT-40 CAS No: 2375033-35-3 Mol Wt: 344.4 Mol F: C18H20N2O3S Inv Status: Custom Synthesis

Chemical Name: Ethyl 2-(4-(sec-butoxy)-3-cyanophenyl)-4-methylthiazole-5-carboxylate

Febuxostat Butyl Ester Impurity

CAT No: CL-FBXT-41 CAS No: 1619982-02-3 Mol Wt: 372.5 Mol F: C20H24N2O3S Inv Status: Custom Synthesis

Chemical Name: Butyl 2-(3-cyano-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylate

Febuxostat Impurity 20

CAT No: CL-FBXT-42 CAS No: 163597-57-7 Mol Wt: 234.32 Mol F: C12H14N2OS Inv Status: Custom Synthesis

Chemical Name: 3-cyano-4-isobutoxy benzothioamide

Febuxostat Impurity 21

CAT No: CL-FBXT-43 CAS No: 1346238-12-7 Mol Wt: 314.4 Mol F: C16H14N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-(3-Cyano-4-((2-methylallyl)oxy)phenyl)-4-methylthiazole-5-carboxylic acid

Febuxostat Impurity 22

CAT No: CL-FBXT-44 CAS No: NA Mol Wt: 316.4 Mol F: C16H16N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-(5-Cyano-2-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid

Febuxostat Impurity 23

CAT No: CL-FBXT-45 CAS No: NA Mol Wt: 460.6 Mol F: C22H24N2O5S2 Inv Status: Custom Synthesis

Chemical Name: 2-(3-(5-(Ethoxycarbonyl)-4-methylthiazol-2-yl)-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid

Febuxostat Impurity 24

CAT No: CL-FBXT-46 CAS No: 2428631-65-4 Mol Wt: 341.4 Mol F: C17H15N3O3S Inv Status: Custom Synthesis

Chemical Name: 2-(3,5-Dicyano-4-isobutoxyphenyl)-4-methylthiazole-5-carboxylic acid

Febuxostat Impurity 25

CAT No: CL-FBXT-47 CAS No: 2095166-41-7 Mol Wt: 363.43 Mol F: C18H21NO5S Inv Status: Custom Synthesis

Chemical Name: 5-(5-(ethoxycarbonyl)-4-methylthiazol-2-yl)-2-isobutoxybenzoic acid

Ethyl-2-Chloro Acetoacetate

CAT No: CL-FBXT-48 CAS No: 609-15-4 Mol Wt: 164.6 Mol F: C6H9ClO3 Inv Status: Custom Synthesis

Chemical Name: Ethyl 2-chloro-3-oxobutanoate

Febuxostat N-Butyl Isomer

CAT No: CL-FBXT-49 CAS No: 1657014-33-9 Mol Wt: 316.4 Mol F: C16H16N2O3S Inv Status: Custom Synthesis

Chemical Name: 2-[3-Cyano-4-(butyloxy)phenyl]-4-methylthiazole-5-carboxylic acid

Febuxostat Impurity 26

CAT No: CL-FBXT-50 CAS No: 25984-63-8 Mol Wt: 153.2 Mol F: C7H7NOS Inv Status: In Stock

Chemical Name: 4-Hydroxythiobenzamide

Febuxostat Acid Ester Impurity

CAT No: CL-FBXT-51 CAS No: 2095166-41-7 Mol Wt: 363.43 Mol F: C18H21NO5S Inv Status: In Stock

Chemical Name: 5-(5-(ethoxycarbonyl)-4-methylthiazol-2-yl)-2-isobutoxybenzoic acid

Febuxostat Impurity 27

CAT No: CL-FBXT-52 CAS No: 767-00-0 Mol Wt: 119.12? Mol F: C7H5NO Inv Status: In Stock

Chemical Name: 4-Hydroxybenzonitrile

Type:Impurity Reference Standard

API NAME:Febuxostat

Total Products: 52

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