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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

Alisol B 23-Acetate chemical structure

Alisol B 23-Acetate

CAS: 26575-95-1
Formula: C₃₂H₅₀O₅
MW: 514.7 g/mol

VQ-051035

Reference Standard

Alkene Leucine Carfilzomib chemical structure

Alkene Leucine Carfilzomib

CAS: 1660143-42-9
Formula: C₄₀H₅₇N₅O₆
MW: 703.9 g/mol

VQ-024793

Reference Standard

All-(S)-Posaconazole chemical structure

All-(S)-Posaconazole

CAS: 1246391-73-0
Formula: C₃₇H₄₂F₂N₈O₄
MW: 700.8 g/mol

VQ-033248

Reference Standard

All-E-Heptaprenol chemical structure

All-E-Heptaprenol

CAS: 32304-16-8
Formula: C₃₅H₅₈O
MW: 494.8 g/mol

VQ-041473

Reference Standard

All-trans-Anhydro Retinol chemical structure

All-trans-Anhydro Retinol

CAS: 1224-78-8
Formula: C₂₀H₂₈
MW: 268.4 g/mol

VQ-028725

Reference Standard

All-trans-Retinal chemical structure

All-trans-Retinal

CAS: 116-31-4
Formula: C₂₀H₂₈O
MW: 284.4 g/mol

VQ-035280

Reference Standard

Alloc Bromoridane chemical structure

Alloc Bromoridane

CAS: 117348-70-6
Formula: C₁₃H₂₀BrNO₄
MW: 334.21 g/mol

VQ-043081

Reference Standard

Allochenodeoxycholic Acid chemical structure

Allochenodeoxycholic Acid

CAS: 15357-34-3
Formula: C₂₄H₄₀O₄
MW: 392.6 g/mol

VQ-043767

Reference Standard

Allopregnanolone chemical structure

Allopregnanolone

CAS: 516-54-1
Formula: C₂₁H₃₄O₂
MW: 318.5 g/mol

VQ-033339

Reference Standard

Allopurinol - Impurity A chemical structure

Allopurinol - Impurity A

CAS: 27511-79-1
Formula: C₈H₁₄N₈O₆S
MW: 350.32 g/mol

VQ-043035

Reference Standard

Allopurinol Impurity F (Freebase) chemical structure

Allopurinol Impurity F (Freebase)

CAS: 302-01-2
Formula: H₄N₂
MW: 32.05 g/mol

VQ-004353

Reference Standard

Allopurinol Impurity F (Hydrate) chemical structure

Allopurinol Impurity F (Hydrate)

CAS: 7803-57-8
Formula: H₆N₂O
MW: 50.06 g/mol

VQ-004354

Reference Standard

Allopurinol Impurity F (Hydrochloride Salt) chemical structure

Allopurinol Impurity F (Hydrochloride Salt)

CAS: 2644-70-4
Formula: ClH₅N₂
MW: 68.51 g/mol

VQ-004355

Reference Standard

Allopurinol Impurity F (Sulfate Salt) chemical structure

Allopurinol Impurity F (Sulfate Salt)

CAS: 10034-93-2
Formula: H₆N₂O₄S
MW: 130.13 g/mol

In stock

Reference Standard

Allopurinol Nitrile Hydrochloride Impurity

Allopurinol Nitrile Hydrochloride Impurity

CAS: 478081-97-9
Formula: C₄H₄N₄ : HCl

VQ-045278

Reference Standard

Allopurinol Nitrile Impurity chemical structure

Allopurinol Nitrile Impurity

CAS: 16617-46-2
Formula: C₄H₄N₄
MW: 108.1 g/mol

VQ-023355

Reference Standard

Alloursodeoxycholic acid chemical structure

Alloursodeoxycholic acid

CAS: 105227-28-9
Formula: C₂₄H₄₀O₄
MW: 392.6 g/mol

VQ-030123

Reference Standard

Allylestrenol Impurity A chemical structure

Allylestrenol Impurity A

CAS: 3646-28-4
Formula: C₁₈H₂₆O
MW: 258.4 g/mol

VQ-028884

Reference Standard

Almotriptan Chlorobutylidene Impurity

Almotriptan Chlorobutylidene Impurity

CAS: 1092797-25-5
Formula: C₁₅H₂₂ClN₃O₂S
MW: 343.9 g/mol

VQ-045435

Reference Standard

Almotriptan Dimer Impurity chemical structure

Almotriptan Dimer Impurity

CAS: 1330166-13-6
Formula: C₃₀H₄₁N₅O₂S
MW: 535.7 g/mol

VQ-024202

Reference Standard

Almotriptan Methyl Tetrahydro Indole Impurity chemical structure

Almotriptan Methyl Tetrahydro Indole Impurity

CAS: 334981-31-6
Formula: C₁₇H₂₃N₃O₂S
MW: 333.5 g/mol

VQ-024203

Reference Standard

Almotriptan Tetrahydro Indole Impurity

Almotriptan Tetrahydro Indole Impurity

CAS: 334981-14-5
Formula: C₁₆H₂₁N₃O₂S
MW: 319.4 g/mol

VQ-045436

Reference Standard

Alogliptin 6-Chloro Impurity chemical structure

Alogliptin 6-Chloro Impurity

CAS: 865758-96-9
Formula: C₁₃H₁₀ClN₃O₂
MW: 275.69 g/mol

In stock

Reference Standard

Alogliptin Benzoate chemical structure

Alogliptin Benzoate

CAS: 850649-62-6
Formula: C₂₅H₂₇N₅O₄
MW: 461.5 g/mol

VQ-020764

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