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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Rosuvastatin EP Impurity L

CAS: 1347797-73-2
Formula: C₄₄H₅₈CaF₂N₆O₁₂S₂
MW: 1005.2 g/mol

ZX-032296

Rosuvastatin EP Impurity M

CAS: 847849-66-5
Formula: C₂₂H₂₉N₃O₆S
MW: 463.5 g/mol

ZX-022707

Rosuvastatin EP Impurity N

CAS: 2290571-51-4
Formula: C₂₂H₂₆FN₃O₅S
MW: 463.5 g/mol

ZX-026819

Rosuvastatin FP Impurity B, Rosuvastatin EP Impurity H (Calcium salt)

CAS: 1335110-44-5
Formula: C₂₂H₂₈FN₃O₆S
MW: 481.5 g/mol

ZX-027756

Rotigotine EP Impurity A

CAS: 112835-48-0
Formula: C₁₉H₂₅NOS
MW: 315.5 g/mol

ZX-005981

Rotigotine EP Impurity B

CAS: 101470-23-9
Formula: C₁₃H₁₉NO
MW: 205.3 g/mol

ZX-026831

Rotigotine EP Impurity B Hydrobromide

CAS: 165950-84-5
Formula: C₁₃H₂₀BrNO
MW: 286.21 g/mol

ZX-032322

Rotigotine EP Impurity B Hydrochloride

CAS: 1231158-77-2
Formula: C₁₃H₂₀ClNO
MW: 241.76 g/mol

ZX-032320

Rotigotine EP Impurity C

CAS: 153409-14-4
Formula: C₁₆H₁₉NOS
MW: 273.4 g/mol

ZX-026829

Rotigotine EP Impurity D

CAS: 1369625-04-6
Formula: C₁₈H₂₃NOS
MW: 301.4 g/mol

ZX-026832

Rotigotine EP Impurity F

CAS: 835654-68-7
Formula: C₂₁H₂₇NO₂S
MW: 357.5 g/mol

ZX-022712

Rotigotine EP impurity G

CAS: 1422357-33-2
Formula: C₂₂H₂₅NOS₂
MW: 383.6 g/mol

ZX-026830

Rotigotine EP Impurity H

CAS: 1148154-91-9
Formula: C₂₀H₂₇NOS
MW: 329.5 g/mol

ZX-026833

Rotigotine EP Impurity K

CAS: 51927-48-1
Formula: C₁₀H₁₀O
MW: 146.19 g/mol

ZX-005982

Roxithromycin EP Impurity B

CAS: 214902-82-6
Formula: C₃₃H₆₂N₂O₁₂
MW: 678.9 g/mol

ZX-026840

Roxithromycin EP Impurity C

CAS: 111321-02-9
Formula: C₃₇H₆₈N₂O₁₃
MW: 748.9 g/mol

ZX-005983

Roxithromycin EP Impurity D

CAS: 134931-00-3
Formula: C₄₁H₇₆N₂O₁₅
MW: 837 g/mol

ZX-026838

Roxithromycin EP Impurity E

CAS: 1460313-66-9
Formula: C₄₀H₇₄N₂O₁₅
MW: 823 g/mol

ZX-026841

Roxithromycin EP Impurity F

CAS: 118267-18-8
Formula: C₄₀H₇₄N₂O₁₅
MW: 823 g/mol

ZX-026837

Roxithromycin EP Impurity H

CAS: 425365-65-7
Formula: C₄₁H₇₆N₂O₁₄
MW: 821 g/mol

ZX-026842

Roxithromycin EP Impurity I

CAS: 425365-66-8
Formula: C₄₅H₈₄N₂O₁₇
MW: 925.2 g/mol

ZX-005984

Roxithromycin EP Impurity J

CAS: 134834-12-1
Formula: C₄₀H₇₃ClN₂O₁₄
MW: 841.5 g/mol

ZX-026839

Rufinamide USP RC B

CAS: 217448-86-7
Formula: C₁₁H₉F₂N₃O₂
MW: 253.2 g/mol

ZX-026852

Rupatadine EP Impurity A

CAS: 1354055-68-7
Formula: C₃₀H₃₁ClN₃O₄⁺
MW: 533 g/mol

ZX-022722

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