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Impurities & Reference Standards

Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.

28,554products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,252 Pharmacopeial Impurities (EP / USP / BP) 4,401 Nitrosamine Impurities 650 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612 Metabolites & Degradation Products 4,146 API Reference Standards 3,493

Reference Standard

Asenapine Pyrrolidine-2,4-dione Impurity chemical structure

Asenapine Pyrrolidine-2,4-dione Impurity

CAS: 1162120-35-5
Formula: C₁₇H₁₄ClNO₃
MW: 315.7 g/mol

VQ-029227

Reference Standard

Asenapine Tetradehydro Impurity chemical structure

Asenapine Tetradehydro Impurity

CAS: 129385-60-0
Formula: C₁₇H₁₂ClNO
MW: 281.7 g/mol

In stock

Reference Standard

Asiaticoside chemical structure

CAS: 16830-15-2
Formula: C₄₈H₇₈O₁₉
MW: 959.1 g/mol

VQ-024375

Reference Standard

Asivatrep chemical structure

CAS: 1005168-10-4
Formula: C₂₁H₂₂F₅N₃O₃S
MW: 491.5 g/mol

VQ-051471

Reference Standard

Asp-5-Oxytocin chemical structure

CAS: 65907-78-0
Formula: C₄₃H₆₅N₁₁O₁₃S₂
MW: 1008.2 g/mol

VQ-027344

Reference Standard

Asp7 Linaclotide Impurity chemical structure

Asp7 Linaclotide Impurity

CAS: 1207977-38-5
Formula: C₅₉H₇₈N₁₄O₂₂S₆
MW: 1527.7 g/mol

VQ-038043

Reference Standard

Asparagine EP Impurity C chemical structure

Asparagine EP Impurity C

CAS: 98490-54-1
Formula: C₈H₁₂N₄O₄
MW: 228.21 g/mol

VQ-035424

Reference Standard

Aspartame EP Impurity A chemical structure

Aspartame EP Impurity A

CAS: 5262-10-2
Formula: C₁₃H₁₄N₂O₄
MW: 262.26 g/mol

VQ-024376

Reference Standard

Aspartame EP Impurity B chemical structure

Aspartame EP Impurity B

CAS: 13433-09-5
Formula: C₁₃H₁₆N₂O₅
MW: 280.28 g/mol

VQ-021630

Reference Standard

Aspartame EP Impurity C chemical structure

Aspartame EP Impurity C

CAS: 63-91-2
Formula: C₉H₁₁NO₂
MW: 165.19 g/mol

In stock

Reference Standard

Aspartame-d3 chemical structure

CAS: 1356841-28-5
Formula: C₁₄H₁₈N₂O₅
MW: 297.32 g/mol

VQ-043378

Reference Standard

Aspartic Acid - Impurity A (Ammonium Salt) chemical structure

Aspartic Acid - Impurity A (Ammonium Salt)

CAS: 20261-05-6
Formula: C₄H₁₂N₂O₅
MW: 168.15 g/mol

VQ-051025

Reference Standard

Aspartic Acid - Impurity C (Magnesium Salt Hydrobromide) chemical structure

Aspartic Acid - Impurity C (Magnesium Salt Hydrobromide)

CAS: 53459-38-4
Formula: C₅H₈BrMgNO₄
MW: 250.33 g/mol

VQ-048754

Reference Standard

Aspartic acid-D3 chemical structure

Aspartic acid-D3

CAS: 14341-75-4
Formula: C₄H₇NO₄
MW: 136.12 g/mol

VQ-048759

Reference Standard

Aspirin Impurity F chemical structure

Aspirin Impurity F

CAS: 1466-82-6
Formula: C₁₈H₁₄O₇
MW: 342.3 g/mol

VQ-021418

Reference Standard

Aspirin-d4 chemical structure

CAS: 97781-16-3
Formula: C₉H₈O₄
MW: 184.18 g/mol

VQ-024131

Reference Standard

Astemizole chemical structure

CAS: 68844-77-9
Formula: C₂₈H₃₁FN₄O
MW: 458.6 g/mol

VQ-034785

Reference Standard

Asunaprevir chemical structure

CAS: 630420-16-5
Formula: C₃₅H₄₆ClN₅O₉S
MW: 748.3 g/mol

VQ-045243

Reference Standard

Ataluren chemical structure

CAS: 775304-57-9
Formula: C₁₅H₉FN₂O₃
MW: 284.24 g/mol

VQ-029230

Reference Standard

Ataluren-d4 chemical structure

CAS: 1922064-61-6
Formula: C₁₅H₉FN₂O₃
MW: 288.27 g/mol

VQ-047455

Reference Standard

Atazanavir chemical structure

CAS: 198904-31-3
Formula: C₃₈H₅₂N₆O₇
MW: 704.9 g/mol

VQ-024379

Reference Standard

Atazanavir Amine Analog chemical structure

Atazanavir Amine Analog

CAS: 1028634-76-5
Formula: C₃₆H₅₀N₆O₅
MW: 646.8 g/mol

VQ-024382

Reference Standard

Atazanavir Diol Impurity

Atazanavir Diol Impurity

CAS: 73488-74-1
Formula: C₁₅H₂₃NO₄
MW: 281.35 g/mol

VQ-035815

Reference Standard

Atazanavir EP Impurity A chemical structure

Atazanavir EP Impurity A

CAS: 4385-62-0
Formula: C₁₂H₉NO₂
MW: 199.2 g/mol

VQ-021639

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