Impurity Reference Standards

Pharmacopeial Impurities (EP / USP / BP)

Named EP, USP and BP impurities and related compounds for pharmacopoeial methods, system suitability and peak identification.

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Amoxicillin EP Impurity C

CAS: 2088961-37-7
Formula: C₁₆H₁₉N₃O₅S
MW: 365.4 g/mol

ZX-020623

Amoxicillin EP Impurity C

CAS: 94659-47-9
Formula: C₁₆H₁₉N₃O₅S
MW: 365.4 g/mol

ZX-023276

Amoxicillin EP Impurity D

CAS: 1642629-94-4
Formula: C₁₆H₂₁N₃O₆S
MW: 383.4 g/mol

ZX-019861

Amoxicillin EP Impurity D Sodium [Mixture of Isomers]

CAS: 68728-47-2
Formula: C₁₆H₂₀N₃NaO₆S
MW: 405.4 g/mol

ZX-027999

Amoxicillin EP Impurity D Sodium Salt

CAS: 1642559-71-4
Formula: C₁₆H₂₀N₃NaO₆S
MW: 405.4 g/mol

ZX-023272

Amoxicillin EP Impurity E

CAS: 1356020-01-3
Formula: C₁₅H₂₁N₃O₄S
MW: 339.4 g/mol

ZX-019857

Amoxicillin EP Impurity F

CAS: 126247-63-0
Formula: C₁₀H₈N₂O₂
MW: 188.18 g/mol

ZX-019858

Amoxicillin EP Impurity H

CAS: 205826-86-4
Formula: C₁₃H₁₇NO₄
MW: 251.28 g/mol

ZX-019859

Amoxicillin EP Impurity J

CAS: 2088960-43-2
Formula: C₃₂H₃₈N₆O₁₀S₂
MW: 730.8 g/mol

ZX-028000

Amoxicillin EP Impurity K

CAS: 2088961-38-8
Formula: C₃₂H₄₀N₆O₁₁S₂
MW: 748.8 g/mol

ZX-023273

Amoxicillin EP Impurity K

CAS: 210289-72-8
Formula: C₃₂H₄₀N₆O₁₁S₂
MW: 748.8 g/mol

ZX-023279

Amoxicillin EP Impurity L

CAS: 1789703-32-7
Formula: C₂₄H₂₉N₅O₇S₂
MW: 563.7 g/mol

ZX-019860

Amoxicillin EP Impurity P

CAS: 2088960-44-3
Formula: C₁₇H₂₃N₃O₆S
MW: 397.4 g/mol

ZX-023277

Amphotericin B EP Impurity A

CAS: 1405-32-9
Formula: C₄₇H₇₅NO₁₇
MW: 926.1 g/mol

ZX-020630

Amphotericin B EP Impurity B

CAS: 136135-57-4
Formula: C₄₈H₇₅NO₁₇
MW: 938.1 g/mol

ZX-020628

Amphotericin B EP Impurity C

CAS: 136135-61-0
Formula: C₄₉H₇₇NO₁₇
MW: 952.1 g/mol

ZX-020629

Ampicillin EP Impurity B

CAS: 19379-33-0
Formula: C₁₆H₁₉N₃O₄S
MW: 349.4 g/mol

ZX-020631

Ampicillin EP impurity C

CAS: 49841-96-5
Formula: C₁₆H₁₉N₃O₄S
MW: 349.4 g/mol

ZX-028009

Ampicillin EP Impurity D

CAS: 1642629-93-3
Formula: C₁₆H₂₁N₃O₅S
MW: 367.4 g/mol

ZX-020637

Ampicillin EP Impurity E

CAS: 1207726-28-0
Formula: C₂₄H₂₆N₄O₅S
MW: 482.6 g/mol

ZX-020636

Ampicillin EP Impurity F

CAS: 124774-48-7
Formula: C₁₅H₂₁N₃O₃S
MW: 323.4 g/mol

ZX-020635

Ampicillin EP Impurity G

CAS: 31485-02-6
Formula: C₁₆H₁₄N₂O₂
MW: 266.29 g/mol

ZX-020632

Ampicillin EP Impurity H

CAS: 73200-73-4
Formula: C₁₀H₈N₂O
MW: 172.18 g/mol

ZX-033030

Ampicillin EP Impurity I

CAS: 10001-82-8
Formula: C₂₄H₂₆N₄O₅S
MW: 482.6 g/mol

ZX-023285

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