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Impurities & Reference Standards

Pharmacopeial Impurities (EP / USP / BP)

578 pharmacopeial impurities (ep / usp / bp) with CAS numbers, structures and specifications — batch COA and GHS SDS supplied.

4,399products

427in stock

COA + SDSwith every lot

Reference Standard

Linezolid USP Related Compound D chemical structure

Linezolid USP Related Compound D

CAS: 174649-09-3
Formula: C₁₅H₁₉FN₂O₆S
MW: 374.4 g/mol

In stock

Reference Standard

Liothyronine EP Impurity B (Dihydrate Salt) chemical structure

Liothyronine EP Impurity B (Dihydrate Salt)

CAS: 18835-59-1
Formula: C₉H₁₃I₂NO₅
MW: 469.01 g/mol

In stock

Reference Standard

Liothyronine EP Impurity B (Freebase) chemical structure

Liothyronine EP Impurity B (Freebase)

CAS: 300-39-0
Formula: C₉H₉I₂NO₃
MW: 432.98 g/mol

In stock

Reference Standard

Lisinopril EP Impurity A chemical structure

Lisinopril EP Impurity A

CAS: 1012-05-1
Formula: C₁₀H₁₃NO₂
MW: 179.22 g/mol

VQ-025537

Reference Standard

Lisinopril EP Impurity A chemical structure

Lisinopril EP Impurity A

CAS: 5472-95-7
Formula: C₁₁H₁₅NO₂
MW: 193.24 g/mol

VQ-048911

Reference Standard

Lisinopril EP Impurity B (Freebase) chemical structure

Lisinopril EP Impurity B (Freebase)

CAS: 104-15-4
Formula: C₇H₈O₃S
MW: 172.2 g/mol

VQ-006490

Reference Standard

Lisinopril EP Impurity B (Monohydrate Salt) chemical structure

Lisinopril EP Impurity B (Monohydrate Salt)

CAS: 6192-52-5
Formula: C₇H₁₀O₄S
MW: 190.22 g/mol

VQ-006491

Reference Standard

Lisinopril EP Impurity C (Free Base) chemical structure

Lisinopril EP Impurity C (Free Base)

CAS: 328385-86-0
Formula: C₂₁H₂₉N₃O₄
MW: 387.5 g/mol

VQ-043212

Reference Standard

Lisinopril EP Impurity D chemical structure

Lisinopril EP Impurity D

CAS: 219677-82-4
Formula: C₂₁H₂₉N₃O₄
MW: 387.5 g/mol

VQ-031597

Reference Standard

Lisinopril EP Impurity E chemical structure

Lisinopril EP Impurity E

CAS: 85955-59-5
Formula: C₂₁H₃₁N₃O₅
MW: 405.5 g/mol

VQ-031598

Reference Standard

Lisinopril EP impurity E(Risomer)Sodium Salt chemical structure

Lisinopril EP impurity E(Risomer)Sodium Salt

CAS: 1356019-70-9
Formula: C₂₁H₃₁N₃NaO₅
MW: 428.5 g/mol

VQ-048909

Reference Standard

Lisinopril EP Impurity F chemical structure

Lisinopril EP Impurity F

CAS: 1132650-67-9
Formula: C₂₁H₃₇N₃O₅
MW: 411.5 g/mol

VQ-031599

Reference Standard

Lisinopril EP Impurity G chemical structure

Lisinopril EP Impurity G

CAS: 1356839-89-8
Formula: C₄₂H₆₀N₆O₉
MW: 793 g/mol

VQ-026493

Reference Standard

Lisinopril EP Impurity H chemical structure

Lisinopril EP Impurity H

CAS: 138247-43-5
Formula: C₁₆H₂₄N₂O₄
MW: 308.37 g/mol

VQ-031600

Reference Standard

Lisinopril EP impurity I chemical structure

Lisinopril EP impurity I

CAS: 927819-64-5
Formula: C₃₁H₄₁N₃O₇
MW: 567.7 g/mol

VQ-031601

Reference Standard

Lisinopril EP Impurity J chemical structure

Lisinopril EP Impurity J

CAS: 2566937-60-6
Formula: C₃₇H₅₃N₅O₈
MW: 695.8 g/mol

VQ-026494

Reference Standard

Lomustine EP Impurity A chemical structure

Lomustine EP Impurity A

CAS: 2214-72-4
Formula: C₅H₁₀Cl₂N₂O
MW: 185.05 g/mol

VQ-022025

Reference Standard

Lomustine EP Impurity B chemical structure

Lomustine EP Impurity B

CAS: 13908-11-7
Formula: C₉H₁₇ClN₂O
MW: 204.7 g/mol

VQ-031610

Reference Standard

Lomustine EP Impurity C chemical structure

Lomustine EP Impurity C

CAS: 2387-23-7
Formula: C₁₃H₂₄N₂O
MW: 224.34 g/mol

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Reference Standard

Loperamide EP Impurity A chemical structure

Loperamide EP Impurity A

CAS: 1391052-94-0
Formula: C₃₅H₃₇ClN₂O₂
MW: 553.1 g/mol

VQ-026496

Reference Standard

Loperamide EP Impurity B

Loperamide EP Impurity B

CAS: 2575516-62-8
Formula: C₄₇H₅₃ClN₃O₃⁺
MW: 743.39 g/mol

VQ-038109

Reference Standard

Loperamide EP Impurity D chemical structure

Loperamide EP Impurity D

CAS: 37743-41-2
Formula: C₂₉H₃₄N₂O₂
MW: 442.6 g/mol

VQ-022996

Reference Standard

Loperamide EP Impurity D Hydrochloride

Loperamide EP Impurity D Hydrochloride

CAS: 1134369-22-4
Formula: C₂₉H₃₅ClN₂O₂
MW: 479.06 g/mol

VQ-031614

Reference Standard

Loperamide EP Impurity E chemical structure

Loperamide EP Impurity E

CAS: 1426322-82-8
Formula: C₃₈H₄₀Cl₂N₂O₃
MW: 643.6 g/mol

VQ-022997

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