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Impurities & Reference Standards

API Impurities

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

14,252products

1,516in stock

COA + SDSwith every lot

Reference Standard

Bacitracin B1 chemical structure

CAS: 57762-79-5
Formula: C₆₅H₁₀₁N₁₇O₁₆S
MW: 1408.7 g/mol

VQ-021722

Reference Standard

Bacitracin B2 chemical structure

CAS: 57762-78-4
Formula: C₆₅H₁₀₁N₁₇O₁₆S
MW: 1408.7 g/mol

VQ-024481

Reference Standard

Bacitracin B3 chemical structure

CAS: 149146-32-7
Formula: C₆₅H₁₀₁N₁₇O₁₆S
MW: 1408.7 g/mol

VQ-024482

Reference Standard

Bacitracin C2 chemical structure

CAS: 149146-34-9
Formula: C₆₄H₉₉N₁₇O₁₆S
MW: 1394.6 g/mol

VQ-029343

Reference Standard

Bacitracin F chemical structure

CAS: 22601-63-4
Formula: C₆₆H₉₈N₁₆O₁₇S
MW: 1419.6 g/mol

VQ-021721

Reference Standard

Bacitracin-Zinc chemical structure

Bacitracin-Zinc

CAS: 1405-89-6
Formula: C₆₆H₁₀₁N₁₇O₁₆SZn
MW: 1486.1 g/mol

VQ-024483

Reference Standard

Baclofen amide impurity

Baclofen amide impurity

CAS: 1500708-07-5
Formula: C₁₀H₁₀ClNO₃
MW: 227.6 g/mol

VQ-024489

Reference Standard

Baclofen Impurity 30

Baclofen Impurity 30

CAS: 81187-88-4
Formula: C₁₀H₉ClO₂
MW: 196.63 g/mol

VQ-035908

Reference Standard

Baclofen Impurity A chemical structure

Baclofen Impurity A

CAS: 22518-27-0
Formula: C₁₀H₁₀ClNO
MW: 195.64 g/mol

In stock

Reference Standard

Baclofen Impurity A (Sodium)

Baclofen Impurity A (Sodium)

CAS: 113933-06-5
Formula: C₁₀H₁₀ClNO.Na
MW: 218.65 g/mol

VQ-004472

Reference Standard

Baclofen Impurity B chemical structure

Baclofen Impurity B

CAS: 1141-23-7
Formula: C₁₁H₁₂ClNO₃
MW: 241.67 g/mol

In stock

Reference Standard

Baclofen Impurity G chemical structure

Baclofen Impurity G

CAS: 114661-63-1
Formula: C₁₄H₂₀ClNO₂
MW: 269.77 g/mol

VQ-044945

Reference Standard

Baclofen Methyl ester Hydrochloride chemical structure

Baclofen Methyl ester Hydrochloride

CAS: 213407-11-5
Formula: C₁₁H₁₅Cl₂NO₂
MW: 264.14 g/mol

VQ-024491

Reference Standard

Bacopasaponin C chemical structure

Bacopasaponin C

CAS: 178064-13-6
Formula: C₄₆H₇₄O₁₇
MW: 899.1 g/mol

VQ-032874

Reference Standard

Bacopaside I chemical structure

CAS: 382148-47-2
Formula: C₄₆H₇₄O₂₀S
MW: 979.1 g/mol

VQ-027296

Reference Standard

Bacopaside II chemical structure

CAS: 382146-66-9
Formula: C₄₇H₇₆O₁₈
MW: 929.1 g/mol

VQ-032875

Reference Standard

Bacopaside X chemical structure

CAS: 94443-88-6
Formula: C₄₆H₇₄O₁₇
MW: 899.1 g/mol

VQ-032876

Reference Standard

Bacoside A3 chemical structure

CAS: 157408-08-7
Formula: C₄₇H₇₆O₁₈
MW: 929.1 g/mol

VQ-032594

Reference Standard

Baloxavir chemical structure

CAS: 1985605-59-1
Formula: C₂₄H₁₉F₂N₃O₄S
MW: 483.5 g/mol

VQ-021731

Reference Standard

Baloxavir (R, R) Diastereomer Impurity chemical structure

Baloxavir (R, R) Diastereomer Impurity

CAS: 2826217-70-1
Formula: C₂₄H₁₉F₂N₃O₄S
MW: 483.5 g/mol

VQ-045448

Reference Standard

Baloxavir (S, S) Diastereomer Impurity chemical structure

Baloxavir (S, S) Diastereomer Impurity

CAS: 2571566-81-7
Formula: C₂₄H₁₉F₂N₃O₄S
MW: 483.5 g/mol

VQ-035554

Reference Standard

Baloxavir Benzyloxy-N-Boc-Amino Dihydropyridine Ester Impurity chemical structure

Baloxavir Benzyloxy-N-Boc-Amino Dihydropyridine Ester Impurity

CAS: 1985607-65-5
Formula: C₂₀H₂₄N₂O₆
MW: 388.4 g/mol

VQ-029353

Reference Standard

Baloxavir Desfluoro Thiepinone Impurity chemical structure

Baloxavir Desfluoro Thiepinone Impurity

CAS: 2365473-57-8
Formula: C₁₄H₉FOS
MW: 244.29 g/mol

VQ-025385

Reference Standard

Baloxavir Ethoxy Impurity

Baloxavir Ethoxy Impurity

CAS: 2417354-06-2
Formula: C₂₆H₂₃F₂N₃O₄S
MW: 511.54 g/mol

VQ-035531

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