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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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COA + SDSwith every lot

Reference Standard

Riluzole Bromo Impurity (Hydrobromide)

Riluzole Bromo Impurity (Hydrobromide)

CAS: 144864-70-0
Formula: C₈H₄BrF₃N₂OS.BrH
MW: 394.01 g/mol

VQ-005777

Reference Standard

Riluzole Dimer

Formula: C₁₇H₁₀F₆N₄O₂S₂
MW: 480.41 g/mol

In stock

Reference Standard

Rimegepant hemisulfate sesquihydrate chemical structure

Rimegepant hemisulfate sesquihydrate

CAS: 1374024-48-2
Formula: C₅₆H₆₄F₄N₁₂O₁₃S
MW: 1221.2 g/mol

VQ-033548

Reference Standard

Riociguat Impurtiy 6 chemical structure

Riociguat Impurtiy 6

CAS: 1702271-98-4
Formula: C₁₈H₁₇FN₈
MW: 364.4 g/mol

VQ-023638

Reference Standard

Riociguat N-Ethyl Impurity chemical structure

Riociguat N-Ethyl Impurity

CAS: 1361570-27-5
Formula: C₂₁H₂₁FN₈O₂
MW: 436.4 g/mol

VQ-033559

Reference Standard

Riociguat Triamino Impurity chemical structure

Riociguat Triamino Impurity

CAS: 428854-24-4
Formula: C₁₇H₁₅FN₈
MW: 350.4 g/mol

VQ-033553

Reference Standard

Ripasudil Monohydrochloride Dihydrate chemical structure

Ripasudil Monohydrochloride Dihydrate

CAS: 887375-67-9
Formula: C₁₅H₂₃ClFN₃O₄S
MW: 395.9 g/mol

VQ-027830

Reference Standard

Risdiplam Formyl Impurity chemical structure

Risdiplam Formyl Impurity

Formula: C₂₃H₂₃N₇O₂
MW: 429.5 g/mol

In stock

Reference Standard

Risedronate Sodium Hydrate chemical structure

Risedronate Sodium Hydrate

CAS: 353228-19-0
Formula: C₇H₁₂NNaO₈P₂
MW: 323.11 g/mol

VQ-041930

Reference Standard

Risperidone - Impurity J chemical structure

Risperidone - Impurity J

CAS: 1346606-24-3
Formula: C₃₅H₄₀F₂N₆O₃
MW: 630.7 g/mol

VQ-033567

Reference Standard

Risperidone Difluoro Acetyl Impurity chemical structure

Risperidone Difluoro Acetyl Impurity

CAS: 84162-82-3
Formula: C₁₄H₁₅F₂NO₂
MW: 267.27 g/mol

In stock

Reference Standard

Risperidone Dimer Impurity chemical structure

Risperidone Dimer Impurity

CAS: 531524-17-1
Formula: C₂₄H₂₅FN₄O₂
MW: 420.5 g/mol

In stock

Reference Standard

Risperidone E,Z-Oxime (Mixture) chemical structure

Risperidone E,Z-Oxime (Mixture)

CAS: 158697-66-6
Formula: C₂₃H₂₈F₂N₄O₂
MW: 430.5 g/mol

VQ-033569

Reference Standard

Risperidone Ethyl Impurity chemical structure

Risperidone Ethyl Impurity

CAS: 70381-58-7
Formula: C₁₁H₁₆N₂O
MW: 192.26 g/mol

VQ-041933

Reference Standard

Risperidone Impurity 3 chemical structure

Risperidone Impurity 3

CAS: 84162-80-1
Formula: C₁₃H₁₃F₂NO₂
MW: 253.24 g/mol

VQ-033572

Reference Standard

Risperidone Impurity Adduct

Risperidone Impurity Adduct

Formula: C₃₅H₃₉FN₆O₃
MW: 610.72 g/mol

In stock

Reference Standard

Risperidone Related Compound 8 chemical structure

Risperidone Related Compound 8

CAS: 41078-70-0
Formula: C₁₁H₁₁ClN₂O
MW: 222.67 g/mol

In stock

Reference Standard

Ritlecitinib Des Methyl Vinyl ketone Impurity chemical structure

Ritlecitinib Des Methyl Vinyl ketone Impurity

CAS: 2042650-70-2
Formula: C₁₂H₁₇N₅
MW: 231.3 g/mol

VQ-041939

Reference Standard

Ritlecitinib Dimer Impurity

Ritlecitinib Dimer Impurity

CAS: 2374827-88-8
Formula: C₃₀H₃₈N₁₀O₂
MW: 570.69 g/mol

VQ-041938

Reference Standard

Ritonavir Enantiomer chemical structure

Ritonavir Enantiomer

CAS: 2872582-94-8
Formula: C₃₇H₄₈N₆O₅S₂
MW: 720.9 g/mol

VQ-043280

Reference Standard

Ritonavir Geo-isomer chemical structure

Ritonavir Geo-isomer

CAS: 959315-21-0
Formula: C₃₇H₄₈N₆O₅S₂
MW: 720.9 g/mol

VQ-033581

Reference Standard

Ritonavir Impurity 34 chemical structure

Ritonavir Impurity 34

CAS: 80232-90-2
Formula: C₇H₁₂N₂S
MW: 156.25 g/mol

VQ-040964

Reference Standard

Ritonavir MTV-III Isoleucine Analog Impurity

Ritonavir MTV-III Isoleucine Analog Impurity

CAS: 1260720-78-2
Formula: C₁₅H₂₅N₃O₃S
MW: 327.4 g/mol

VQ-044449

Reference Standard

Rivaroxaban Amide Dimer chemical structure

Rivaroxaban Amide Dimer

CAS: 1838133-00-8
Formula: C₂₃H₂₁Cl₂N₃O₅S₂
MW: 554.5 g/mol

VQ-033592

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