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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

Levofloxacin Diamine Impurity chemical structure

Levofloxacin Diamine Impurity

CAS: 1797510-34-9
Formula: C₁₅H₁₆FN₃O₄
MW: 321.3 g/mol

VQ-022973

Reference Standard

Levofloxacin Diamine Impurity chemical structure

Levofloxacin Diamine Impurity

CAS: 1797099-76-3
Formula: C₁₅H₁₇ClFN₃O₄
MW: 357.76 g/mol

VQ-026442

Reference Standard

Levofloxacin Impurity 10 chemical structure

Levofloxacin Impurity 10

CAS: 106939-34-8
Formula: C₁₅H₁₃F₂NO₄
MW: 309.26 g/mol

VQ-026983

Reference Standard

Levofloxacin Impurity 8 chemical structure

Levofloxacin Impurity 8

CAS: 151250-74-7
Formula: C₁₃H₁₁FN₂O₄
MW: 278.24 g/mol

VQ-038008

Reference Standard

Levofloxacin Methyl Ester chemical structure

Levofloxacin Methyl Ester

CAS: 862690-19-5
Formula: C₁₉H₂₂FN₃O₄
MW: 375.4 g/mol

VQ-031529

Reference Standard

Levoketoconazole chemical structure

Levoketoconazole

CAS: 142128-57-2
Formula: C₂₆H₂₈Cl₂N₄O₄
MW: 531.4 g/mol

VQ-031374

Reference Standard

Levomedetomidine Hydrochloride chemical structure

Levomedetomidine Hydrochloride

CAS: 190000-46-5
Formula: C₁₃H₁₇ClN₂
MW: 236.74 g/mol

VQ-022974

Reference Standard

Levomefolate Glucosamine chemical structure

Levomefolate Glucosamine

CAS: 1181972-37-1
Formula: C₃₂H₅₁N₉O₁₆
MW: 817.8 g/mol

VQ-038015

Reference Standard

Levomefolic acid chemical structure

Levomefolic acid

CAS: 31690-09-2
Formula: C₂₀H₂₅N₇O₆
MW: 459.5 g/mol

VQ-031531

Reference Standard

Levomenol chemical structure

CAS: 23089-26-1
Formula: C₁₅H₂₆O
MW: 222.37 g/mol

VQ-024601

Reference Standard

Levomepromazine Sulphone Hydrochloride chemical structure

Levomepromazine Sulphone Hydrochloride

CAS: 60119-90-6
Formula: C₁₉H₂₅ClN₂O₃S
MW: 396.9 g/mol

VQ-038018

Reference Standard

Levomilnacipran Acid Amide Impurity chemical structure

Levomilnacipran Acid Amide Impurity

CAS: 1452824-74-6
Formula: C₂₃H₂₆N₂O₄
MW: 394.5 g/mol

VQ-031916

Reference Standard

Levomilnacipran Hydrochloride chemical structure

Levomilnacipran Hydrochloride

CAS: 175131-60-9
Formula: C₁₅H₂₃ClN₂O
MW: 282.81 g/mol

VQ-031910

Reference Standard

Levomilnacipran Pthalimido Impurity chemical structure

Levomilnacipran Pthalimido Impurity

CAS: 1237261-65-2
Formula: C₂₃H₂₄N₂O₃
MW: 376.4 g/mol

VQ-031912

Reference Standard

Levonadifloxacin chemical structure

Levonadifloxacin

CAS: 154357-42-3
Formula: C₁₉H₂₁FN₂O₄
MW: 360.4 g/mol

VQ-038535

Reference Standard

Levonebivolol chemical structure

CAS: 118457-16-2
Formula: C₂₂H₂₅F₂NO₄
MW: 405.4 g/mol

VQ-026839

Reference Standard

Levonorgestrel 6-Hydroxy Impurity chemical structure

Levonorgestrel 6-Hydroxy Impurity

CAS: 40915-05-7
Formula: C₂₁H₂₈O₃
MW: 328.4 g/mol

VQ-038020

Reference Standard

Levopimaric acid chemical structure

Levopimaric acid

CAS: 79-54-9
Formula: C₂₀H₃₀O₂
MW: 302.5 g/mol

VQ-038021

Reference Standard

Levosalbutamol chemical structure

CAS: 34391-04-3
Formula: C₁₃H₂₁NO₃
MW: 239.31 g/mol

VQ-031507

Reference Standard

Levosimendan Cyanoacetamide Hydrazone Impurity chemical structure

Levosimendan Cyanoacetamide Hydrazone Impurity

CAS: 274263-65-9
Formula: C₁₄H₁₄N₆O₂
MW: 298.3 g/mol

VQ-026452

Reference Standard

Levosulpride Impurity A chemical structure

Levosulpride Impurity A

CAS: 22795-99-9
Formula: C₇H₁₆N₂
MW: 128.22 g/mol

In stock

Reference Standard

Levothyroxine - Impurity G chemical structure

Levothyroxine - Impurity G

CAS: 2230724-39-5
Formula: C₁₅H₁₃I₄NO₂
MW: 746.89 g/mol

VQ-043209

Reference Standard

Levothyroxine Acetamide Impurity chemical structure

Levothyroxine Acetamide Impurity

CAS: 176258-88-1
Formula: C₁₄H₉I₄NO₃
MW: 746.84 g/mol

In stock

Reference Standard

Levothyroxine Ethyl Ester chemical structure

Levothyroxine Ethyl Ester

CAS: 76353-71-4
Formula: C₁₇H₁₅I₄NO₄
MW: 804.92 g/mol

VQ-034857

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