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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.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

Timolol EP Impurity A Maleate chemical structure

Timolol EP Impurity A Maleate

CAS: 26839-77-0
Formula: C₁₇H₂₈N₄O₇S
MW: 432.5 g/mol

VQ-042553

Reference Standard

Timolol EP Impurity B chemical structure

Timolol EP Impurity B

CAS: 59697-06-2
Formula: C₁₃H₂₄N₄O₃S
MW: 316.42 g/mol

VQ-023897

Reference Standard

Timolol EP Impurity B (Maleate salt)

Timolol EP Impurity B (Maleate salt)

CAS: 610271-55-1
Formula: C₁₃H₂₄N₄O₃S : C₄H₄O₄
MW: 432.49 g/mol

VQ-043869

Reference Standard

Timolol EP Impurity C Racemic chemical structure

Timolol EP Impurity C Racemic

CAS: 610271-56-2
Formula: C₁₉H₃₁N₇O₄S₂
MW: 485.6 g/mol

VQ-028394

Reference Standard

Timolol EP Impurity D chemical structure

Timolol EP Impurity D

CAS: 30165-97-0
Formula: C₆H₉N₃O₂S
MW: 187.22 g/mol

VQ-028391

Reference Standard

Timolol EP Impurity F chemical structure

Timolol EP Impurity F

CAS: 30165-96-9
Formula: C₆H₈ClN₃OS
MW: 205.67 g/mol

VQ-028390

Reference Standard

Timolol EP Impurity G chemical structure

Timolol EP Impurity G

CAS: 75202-36-7
Formula: C₆H₉N₃O₃S
MW: 203.22 g/mol

VQ-034275

Reference Standard

Timolol EP Impurity H chemical structure

Timolol EP Impurity H

CAS: 158636-97-6
Formula: C₁₃H₂₄N₄O₃S
MW: 316.42 g/mol

VQ-028397

Reference Standard

Timolol EP Impurity I chemical structure

Timolol EP Impurity I

CAS: 2469037-77-0
Formula: C₁₁H₂₀N₄O₃S
MW: 288.37 g/mol

VQ-028396

Reference Standard

Timolol Impurity 6 chemical structure

Timolol Impurity 6

CAS: 158636-99-8
Formula: C₁₀H₁₇N₃O₂S
MW: 243.33 g/mol

VQ-034281

Reference Standard

Timolol Impurity 7 chemical structure

Timolol Impurity 7

CAS: 30315-49-2
Formula: C₁₄H₂₁NO₂
MW: 235.32 g/mol

VQ-034282

Reference Standard

Timolol Impurity E chemical structure

Timolol Impurity E

CAS: 1026075-53-5
Formula: C₁₇H₂₆N₄O₆S
MW: 414.5 g/mol

VQ-028395

Reference Standard

Timolol Maleate chemical structure

Timolol Maleate

CAS: 26921-17-5
Formula: C₁₇H₂₈N₄O₇S
MW: 432.5 g/mol

In stock

Reference Standard

Timolol Maleate - Impurity E (Maleate Salt) chemical structure

Timolol Maleate - Impurity E (Maleate Salt)

CAS: 3077786-31-0
Formula: C₂₁H₃₀N₄O₁₀S
MW: 530.6 g/mol

VQ-042556

Reference Standard

Timolol Related Compound C chemical structure

Timolol Related Compound C

CAS: 610271-57-3
Formula: C₂₃H₃₅N₇O₈S₂
MW: 601.7 g/mol

VQ-042554

Reference Standard

Timonacic chemical structure

CAS: 444-27-9
Formula: C₄H₇NO₂S
MW: 133.17 g/mol

VQ-032553

Reference Standard

Tinidazole EP Impurity B chemical structure

Tinidazole EP Impurity B

CAS: 25459-12-5
Formula: C₈H₁₃N₃O₄S
MW: 247.27 g/mol

VQ-023898

Reference Standard

Tinidazole-d5 chemical structure

CAS: 1216767-04-2
Formula: C₈H₁₃N₃O₄S
MW: 252.3 g/mol

VQ-042558

Reference Standard

Tinopal chemical structure

CAS: 24231-46-7
Formula: C₄₀H₄₀N₁₂O₈S₂
MW: 881 g/mol

VQ-040997

Reference Standard

Tiocloxacillin chemical structure

CAS: 5053-36-1
Formula: C₁₉H₁₈ClN₃O₄S₂
MW: 451.9 g/mol

VQ-025070

Reference Standard

Tioconazole chemical structure

CAS: 65899-73-2
Formula: C₁₆H₁₃Cl₃N₂OS
MW: 387.7 g/mol

VQ-023899

Reference Standard

Tioconazole EP Impurity A chemical structure

Tioconazole EP Impurity A

CAS: 119386-74-2
Formula: C₁₆H₁₄Cl₂N₂OS
MW: 353.3 g/mol

VQ-006735

Reference Standard

Tioconazole EP Impurity A (Hydrochloride) chemical structure

Tioconazole EP Impurity A (Hydrochloride)

CAS: 61709-33-9
Formula: C₁₆H₁₅Cl₃N₂OS
MW: 389.7 g/mol

In stock

Reference Standard

Tioconazole EP Impurity B chemical structure

Tioconazole EP Impurity B

CAS: 119386-75-3
Formula: C₁₆H₁₂Cl₄N₂OS
MW: 422.2 g/mol

VQ-045355

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