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Impurities & Reference Standards

Pharmacopeial Impurities (EP / USP / BP)

578 pharmacopeial impurities (ep / usp / bp) with CAS numbers, structures and specifications — batch COA and GHS SDS supplied.

4,399products

427in stock

COA + SDSwith every lot

Reference Standard

Tigecycline USP Related Compound G chemical structure

Tigecycline USP Related Compound G

CAS: 1268494-40-1
Formula: C₂₇H₃₂N₄O₉
MW: 556.6 g/mol

VQ-028387

Reference Standard

Timolol EP Impurity A chemical structure

Timolol EP Impurity A

CAS: 26839-76-9
Formula: C₁₃H₂₄N₄O₃S
MW: 316.42 g/mol

VQ-028393

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

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

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

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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

Reference Standard

Tioconazole EP Impurity C chemical structure

Tioconazole EP Impurity C

CAS: 119386-76-4
Formula: C₁₆H₁₂BrCl₃N₂OS
MW: 466.6 g/mol

VQ-028399

Reference Standard

Tiotropium EP Impurity A chemical structure

Tiotropium EP Impurity A

CAS: 4746-63-8
Formula: C₁₀H₈O₃S₂
MW: 240.3 g/mol

VQ-023901

Reference Standard

Tiotropium EP Impurity B chemical structure

Tiotropium EP Impurity B

CAS: 136310-64-0
Formula: C₁₈H₁₉NO₄S₂
MW: 377.5 g/mol

VQ-023904

Reference Standard

Tiotropium EP Impurity C chemical structure

Tiotropium EP Impurity C

CAS: 136310-95-7
Formula: C₁₉H₂₂BrNO₃S₂
MW: 456.4 g/mol

VQ-023902

Reference Standard

Tiotropium EP Impurity D chemical structure

Tiotropium EP Impurity D

CAS: 136310-66-2
Formula: C₁₈H₁₉NO₃S₂
MW: 361.5 g/mol

VQ-023905

Reference Standard

Tiotropium EP Impurity F chemical structure

Tiotropium EP Impurity F

CAS: 704-38-1
Formula: C₉H₆OS₂
MW: 194.3 g/mol

VQ-023903

Reference Standard

Tiotropium EP Impurity G chemical structure

Tiotropium EP Impurity G

CAS: 1508-46-9
Formula: C₉H₁₆BrNO₂
MW: 250.13 g/mol

VQ-021351

Reference Standard

Tiotropium EP Impurity I chemical structure

Tiotropium EP Impurity I

CAS: 136521-48-7
Formula: C₁₉H₂₂BrNO₄S₂
MW: 472.4 g/mol

VQ-028401

Reference Standard

Tizanidine EP Impurity A chemical structure

Tizanidine EP Impurity A

CAS: 51322-69-1
Formula: C₉H₉N₅S
MW: 219.27 g/mol

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