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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

Tetracaine EP Impurity C chemical structure

Tetracaine EP Impurity C

CAS: 71839-12-8
Formula: C₁₂H₁₇NO₂
MW: 207.27 g/mol

VQ-023866

Reference Standard

Tetracycline EP impurity B chemical structure

Tetracycline EP impurity B

CAS: 6542-44-5
Formula: C₂₃H₂₅NO₈
MW: 443.4 g/mol

VQ-023438

Reference Standard

Tetracycline EP Impurity C chemical structure

Tetracycline EP Impurity C

CAS: 1665-56-1
Formula: C₂₂H₂₂N₂O₇
MW: 426.4 g/mol

VQ-023870

Reference Standard

Tetracycline EP Impurity D chemical structure

Tetracycline EP Impurity D

CAS: 7518-17-4
Formula: C₂₂H₂₂N₂O₇
MW: 426.4 g/mol

VQ-023871

Reference Standard

Tetraxetan USP Related Compound A chemical structure

Tetraxetan USP Related Compound A

CAS: 2101625-18-5
Formula: C₁₈H₃₂N₄O₈
MW: 432.5 g/mol

VQ-006733

Reference Standard

Tetraxetan USP Related Compound A (TFA Salt) chemical structure

Tetraxetan USP Related Compound A (TFA Salt)

CAS: 2101625-18-5
Formula: C₁₈H₃₂N₄O₈
MW: 432.5 g/mol

In stock

Reference Standard

Tetryzoline Hydrochloride EP Impurity A chemical structure

Tetryzoline Hydrochloride EP Impurity A

CAS: 56536-96-0
Formula: C₁₁H₁₁N
MW: 157.21 g/mol

VQ-034182

Reference Standard

Theophylline EP Impurity D chemical structure

Theophylline EP Impurity D

CAS: 6736-40-9
Formula: C₆H₁₀N₄O
MW: 154.17 g/mol

VQ-023874

Reference Standard

Theophylline EP Impurity E chemical structure

Theophylline EP Impurity E

CAS: 944-73-0
Formula: C₇H₈N₄O₃
MW: 196.16 g/mol

VQ-024725

Reference Standard

Thiamine EP Impurity A chemical structure

Thiamine EP Impurity A

CAS: 2380-61-2
Formula: C₁₂H₁₆N₄O₄S₂
MW: 344.4 g/mol

VQ-028326

Reference Standard

Thiamine EP Impurity B chemical structure

Thiamine EP Impurity B

CAS: 7770-93-6
Formula: C₁₁H₁₅ClN₄OS
MW: 286.78 g/mol

VQ-043324

Reference Standard

Thiamine EP Impurity B (chloride Hydrochloride) chemical structure

Thiamine EP Impurity B (chloride Hydrochloride)

CAS: 49614-72-4
Formula: C₁₁H₁₆Cl₂N₄OS
MW: 323.2 g/mol

VQ-028330

Reference Standard

Thiamine EP Impurity C chemical structure

Thiamine EP Impurity C

CAS: 7275-24-3
Formula: C₁₂H₁₇Cl₃N₄S
MW: 355.7 g/mol

VQ-034913

Reference Standard

Thiamine EP Impurity C chemical structure

Thiamine EP Impurity C

CAS: 20166-17-0
Formula: C₁₂H₁₆ClN₄S⁺
MW: 283.8 g/mol

VQ-043325

Reference Standard

Thiamine EP Impurity D chemical structure

Thiamine EP Impurity D

CAS: 490-82-4
Formula: C₁₂H₁₆N₄O₂S
MW: 280.35 g/mol

VQ-034190

Reference Standard

Thiamine EP Impurity E chemical structure

Thiamine EP Impurity E

CAS: 299-35-4
Formula: C₁₂H₁₆N₄OS₂
MW: 296.4 g/mol

VQ-028327

Reference Standard

Thiamine EP Impurity F chemical structure

Thiamine EP Impurity F

CAS: 6309-04-2
Formula: C₁₃H₂₀Br₂N₄OS
MW: 440.2 g/mol

VQ-042482

Reference Standard

Thiamine EP Impurity F chemical structure

Thiamine EP Impurity F

CAS: 10593-44-9
Formula: C₁₃H₁₉N₄OS⁺
MW: 279.38 g/mol

VQ-042485

Reference Standard

Thiamine EP Impurity G chemical structure

Thiamine EP Impurity G

CAS: 1037-29-2
Formula: C₁₄H₂₀Cl₂N₄O₂S
MW: 379.3 g/mol

VQ-028328

Reference Standard

Thiamine EP Impurity H chemical structure

Thiamine EP Impurity H

CAS: 89285-03-0
Formula: C₁₄H₂₀N₄O₃S₂
MW: 356.5 g/mol

VQ-028325

Reference Standard

Thiocolchicoside EP Impurity B chemical structure

Thiocolchicoside EP Impurity B

CAS: 2730-71-4
Formula: C₂₂H₂₅NO₅S
MW: 415.5 g/mol

VQ-023881

Reference Standard

Thiocolchicoside EP Impurity C chemical structure

Thiocolchicoside EP Impurity C

CAS: 87424-25-7
Formula: C₂₁H₂₃NO₅S
MW: 401.5 g/mol

VQ-023879

Reference Standard

Thiocolchicoside EP Impurity E chemical structure

Thiocolchicoside EP Impurity E

CAS: 219547-29-2
Formula: C₂₆H₃₁NO₁₀S
MW: 549.6 g/mol

VQ-023878

Reference Standard

Thiocolchicoside EP Impurity G chemical structure

Thiocolchicoside EP Impurity G

CAS: 177991-81-0
Formula: C₂₅H₃₁NO₉S
MW: 521.6 g/mol

VQ-022260

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