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Impurity Reference Standards

Pharmacopoeial impurities, nitrosamines, metabolites, labelled internal standards and API working standards, each backed by analytical data for method development and QC.

20,060 products6 categories2,050 in stockCOA + SDS with every lot

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Captopril EP Impurity F

CAS: 63250-36-2
Formula: C₉H₁₅NO₃S
MW: 217.29 g/mol

ZX-021021

Captopril EP Impurity G

CAS: 33325-40-5
Formula: C₆H₁₀O₃S
MW: 162.21 g/mol

ZX-021019

Captopril EP Impurity H

CAS: 205521-07-9
Formula: C₁₅H₂₃NO₅S₂
MW: 361.5 g/mol

ZX-023745

Captopril EP Impurity J

CAS: 64838-55-7
Formula: C₁₁H₁₇NO₄S
MW: 259.32 g/mol

ZX-021027

Captopril EP Impurity N

CAS: 65134-74-9
Formula: C₈H₁₄O₄S₂
MW: 238.3 g/mol

ZX-021025

Captopril-d3

CAS: 1356383-38-4
Formula: C₉H₁₅NO₃S
MW: 220.31 g/mol

ZX-028451

Carazolol

CAS: 57775-29-8
Formula: C₁₈H₂₂N₂O₂
MW: 298.4 g/mol

ZX-033150

Carbadox

CAS: 6804-07-5
Formula: C₁₁H₁₀N₄O₄
MW: 262.22 g/mol

ZX-043455

Carbamazepine

CAS: 298-46-4
Formula: C₁₅H₁₂N₂O
MW: 236.27 g/mol

ZX-006448

Carbamazepine 10,11-Epoxide

CAS: 36507-30-9
Formula: C₁₅H₁₂N₂O₂
MW: 252.27 g/mol

ZX-022445

Carbamazepine D10

CAS: 132183-78-9
Formula: C₁₅H₁₂N₂O
MW: 246.33 g/mol

ZX-033153

Carbamazepine D8

CAS: 1538624-35-9
Formula: C₁₅H₁₂N₂O
MW: 244.32 g/mol

ZX-033154

Carbamazepine EP Impurity A

CAS: 3564-73-6
Formula: C₁₅H₁₄N₂O
MW: 238.28 g/mol

ZX-020115

Carbamazepine EP Impurity B

CAS: 611-64-3
Formula: C₁₄H₁₁N
MW: 193.24 g/mol

ZX-020116

Carbamazepine EP Impurity C

CAS: 1219170-51-0
Formula: C₁₆H₁₃N₃O₂
MW: 279.29 g/mol

ZX-020117

Carbamazepine EP Impurity D

CAS: 256-96-2
Formula: C₁₄H₁₁N
MW: 193.24 g/mol

ZX-020118

Carbamazepine EP Impurity F

CAS: 33948-22-0
Formula: C₁₅H₁₀ClNO
MW: 255.7 g/mol

ZX-020119

Carbamazepine EP Impurity G

CAS: 59690-97-0
Formula: C₁₅H₁₁BrN₂O
MW: 315.16 g/mol

ZX-020121

Carbamazepine Hydrochloride

CAS: 70972-24-6
Formula: C₁₅H₁₃ClN₂O
MW: 272.73 g/mol

ZX-006449

Carbamazepine Impurity 11

CAS: 869377-50-4
Formula: C₁₅H₁₀N₂O₃
MW: 266.25 g/mol

ZX-028452

Carbamazepine-10,11-epoxide D10

CAS: 1219804-16-6
Formula: C₁₅H₁₂N₂O₂
MW: 262.33 g/mol

ZX-028453

Carbamicacid,N-[(1S,2S,5S)-2-amino-5-[(dimethylamino)carbonyl]cyclohexyl]-, 1,1-dimethylethyl ester

CAS: 2081883-52-3
Formula: C₁₄H₂₇N₃O₃
MW: 285.38 g/mol

ZX-024445

Carbamimidothioic Acid 9-Hydroxynonyl Ester Bromide

CAS: 511545-93-0
Formula: C₁₀H₂₃BrN₂OS
MW: 299.27 g/mol

ZX-029654

Carbamoyl-D-phenylalanine

CAS: 54896-72-9
Formula: C₁₀H₁₂N₂O₃
MW: 208.21 g/mol

ZX-036195

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