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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

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Reference Standard

Racemic Tegoprazan

Racemic Tegoprazan

CAS: 942195-54-2
Formula: C₂₀H₁₉F₂N₃O₃
MW: 387.4 g/mol

VQ-044881

Reference Standard

Racemic-Sertraline Hydrochloride chemical structure

Racemic-Sertraline Hydrochloride

CAS: 79617-89-3
Formula: C₁₇H₁₈Cl₃N
MW: 342.7 g/mol

VQ-033818

Reference Standard

Ralfinamide chemical structure

CAS: 133865-88-0
Formula: C₁₇H₁₉FN₂O₂
MW: 302.34 g/mol

VQ-027722

Reference Standard

Raloxifene 4-Monomethyl Ether chemical structure

Raloxifene 4-Monomethyl Ether

CAS: 185415-07-0
Formula: C₂₉H₂₉NO₄S
MW: 487.6 g/mol

VQ-041815

Reference Standard

Raloxifene 6-Monomethyl Ether chemical structure

Raloxifene 6-Monomethyl Ether

CAS: 178451-13-3
Formula: C₂₉H₂₉NO₄S
MW: 487.6 g/mol

VQ-027724

Reference Standard

Raloxifene Benzoic Acid Impurity Hydrochloride chemical structure

Raloxifene Benzoic Acid Impurity Hydrochloride

CAS: 84449-80-9
Formula: C₁₄H₂₀ClNO₃
MW: 285.76 g/mol

VQ-023604

Reference Standard

Raloxifene Dimer Impurity chemical structure

Raloxifene Dimer Impurity

CAS: 618902-12-8
Formula: C₅₆H₅₂N₂O₈S₂
MW: 945.2 g/mol

In stock

Reference Standard

Raloxifene Dimethoxy Impurity chemical structure

Raloxifene Dimethoxy Impurity

CAS: 84541-38-8
Formula: C₃₀H₃₁NO₄S
MW: 501.6 g/mol

VQ-023603

Reference Standard

Raloxifene Impurity 3 chemical structure

Raloxifene Impurity 3

CAS: 84449-65-0
Formula: C₁₆H₁₄O₆S₃
MW: 398.5 g/mol

In stock

Reference Standard

Raloxifene Impurity 30 chemical structure

Raloxifene Impurity 30

CAS: 89407-97-6
Formula: C₁₅H₂₁NO₃
MW: 263.33 g/mol

In stock

Reference Standard

Raloxifene Impurity 8 chemical structure

Raloxifene Impurity 8

CAS: 225648-21-5
Formula: C₁₅H₁₂O₂S
MW: 256.3 g/mol

In stock

Reference Standard

Raloxifene Impurity 9 chemical structure

Raloxifene Impurity 9

CAS: 175460-94-3
Formula: C₁₅H₁₂O₂S
MW: 256.3 g/mol

In stock

Reference Standard

Raloxifene Impurity A chemical structure

Raloxifene Impurity A

CAS: 84449-85-4
Formula: C₃₀H₃₂ClNO₈S₃
MW: 666.2 g/mol

VQ-023602

Reference Standard

Raltegravir Diketo Amine Impurity chemical structure

Raltegravir Diketo Amine Impurity

CAS: 1193687-86-3
Formula: C₁₈H₂₀FN₅O₅
MW: 405.4 g/mol

VQ-033432

Reference Standard

Raltegravir Impurity 16

Raltegravir Impurity 16

CAS: 1328839-28-6
Formula: C₂₄H₂₃FN₈O₇
MW: 554.49 g/mol

VQ-044825

Reference Standard

Raltegravir Impurity 3 chemical structure

Raltegravir Impurity 3

CAS: 888504-28-7
Formula: C₄H₃KN₂O₃
MW: 166.18 g/mol

VQ-033428

Reference Standard

Raltegravir Oxidative Impurity chemical structure

Raltegravir Oxidative Impurity

CAS: 864244-64-4
Formula: C₉H₈FNO₃
MW: 197.16 g/mol

VQ-033433

Reference Standard

Ramelteon ene amine amide chemical structure

Ramelteon ene amine amide

CAS: 882434-87-9
Formula: C₁₆H₁₉NO₂
MW: 257.33 g/mol

VQ-033437

Reference Standard

Ramelteon Impurity 9 chemical structure

Ramelteon Impurity 9

CAS: 1356395-13-5
Formula: C₁₄H₁₆O₃
MW: 232.27 g/mol

VQ-027738

Reference Standard

Ramelteon lsobutyryl impurity chemical structure

Ramelteon lsobutyryl impurity

CAS: 880152-61-4
Formula: C₁₇H₂₃NO₂
MW: 273.37 g/mol

VQ-027731

Reference Standard

Ramipril Benzyl Ester chemical structure

Ramipril Benzyl Ester

CAS: 87269-88-3
Formula: C₃₀H₃₈N₂O₅
MW: 506.6 g/mol

VQ-043274

Reference Standard

Ramipril Impurity 10

Ramipril Impurity 10

Formula: C₂₅H₃₇N₃O₇
MW: 491.58 g/mol

VQ-005696

Reference Standard

Ramipril Impurity 4 chemical structure

Ramipril Impurity 4

CAS: 122076-80-6
Formula: C₁₅H₂₁NO₄
MW: 279.33 g/mol

VQ-041828

Reference Standard

Ramipril Isomer 1 chemical structure

Ramipril Isomer 1

CAS: 753405-33-3
Formula: C₂₃H₃₂N₂O₅
MW: 416.5 g/mol

VQ-033446

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