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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

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COA + SDSwith every lot

Reference Standard

Bromocriptine Mesilate EP Impurity F chemical structure

Bromocriptine Mesilate EP Impurity F

CAS: 82773-21-5
Formula: C₃₂H₄₀BrN₅O₅
MW: 654.6 g/mol

VQ-021900

Reference Standard

Bromohexine EP Impurity E Chloride chemical structure

Bromohexine EP Impurity E Chloride

CAS: 1660957-93-6
Formula: C₁₅H₂₁Br₂ClN₂
MW: 424.6 g/mol

VQ-024667

Reference Standard

Budesonide EP Impurity A chemical structure

Budesonide EP Impurity A

CAS: 13951-70-7
Formula: C₂₁H₂₈O₆
MW: 376.4 g/mol

VQ-020685

Reference Standard

Budesonide EP Impurity B chemical structure

Budesonide EP Impurity B

CAS: 1040085-98-0
Formula: C₂₃H₃₀O₆
MW: 402.5 g/mol

VQ-020997

Reference Standard

Budesonide EP Impurity C chemical structure

Budesonide EP Impurity C

CAS: 1040085-99-1
Formula: C₂₅H₃₄O₆
MW: 430.5 g/mol

VQ-021000

Reference Standard

Budesonide EP Impurity D chemical structure

Budesonide EP Impurity D

CAS: 85234-63-5
Formula: C₂₅H₃₂O₆
MW: 428.5 g/mol

VQ-021001

Reference Standard

Budesonide EP Impurity E chemical structure

Budesonide EP Impurity E

CAS: 131918-64-4
Formula: C₂₅H₃₂O₆
MW: 428.5 g/mol

VQ-020996

Reference Standard

Budesonide EP Impurity G chemical structure

Budesonide EP Impurity G

CAS: 137174-25-5
Formula: C₂₅H₃₆O₆
MW: 432.5 g/mol

VQ-021002

Reference Standard

Budesonide EP Impurity H chemical structure

Budesonide EP Impurity H

CAS: 313474-58-7
Formula: C₂₅H₃₂O₅
MW: 412.5 g/mol

VQ-021004

Reference Standard

Budesonide EP Impurity I chemical structure

Budesonide EP Impurity I

CAS: 113930-13-5
Formula: C₂₅H₃₄O₇
MW: 446.5 g/mol

VQ-021005

Reference Standard

Budesonide EP Impurity J (Mixture of Diastereomers) chemical structure

Budesonide EP Impurity J (Mixture of Diastereomers)

CAS: 313474-59-8
Formula: C₂₅H₃₃BrO₆
MW: 509.4 g/mol

VQ-020686

Reference Standard

Budesonide EP Impurity K chemical structure

Budesonide EP Impurity K

CAS: 51333-05-2
Formula: C₂₇H₃₆O₇
MW: 472.6 g/mol

VQ-020998

Reference Standard

Bufexamac EP Impurity A chemical structure

Bufexamac EP Impurity A

CAS: 4547-57-3
Formula: C₁₂H₁₆O₃
MW: 208.25 g/mol

VQ-034797

Reference Standard

Bufexamac EP Impurity B chemical structure

Bufexamac EP Impurity B

CAS: 29056-06-2
Formula: C₁₃H₁₈O₃
MW: 222.28 g/mol

VQ-034798

Reference Standard

Bufexamac EP Impurity C chemical structure

Bufexamac EP Impurity C

CAS: 1185726-73-1
Formula: C₁₆H₂₄O₃
MW: 264.36 g/mol

VQ-043082

Reference Standard

Bufexamac EP Impurity D chemical structure

Bufexamac EP Impurity D

CAS: 3413-59-0
Formula: C₁₂H₁₇NO₂
MW: 207.27 g/mol

VQ-043083

Reference Standard

Bumetanide EP Impurity A chemical structure

Bumetanide EP Impurity A

CAS: 28328-53-2
Formula: C₁₃H₁₀N₂O₇S
MW: 338.29 g/mol

VQ-021917

Reference Standard

Bumetanide EP Impurity B chemical structure

Bumetanide EP Impurity B

CAS: 28328-54-3
Formula: C₁₃H₁₂N₂O₅S
MW: 308.31 g/mol

VQ-021012

Reference Standard

Bumetanide EP Impurity C chemical structure

Bumetanide EP Impurity C

CAS: 32643-00-8
Formula: C₂₁H₂₈N₂O₅S
MW: 420.5 g/mol

VQ-021015

Reference Standard

Bumetanide EP impurity D chemical structure

Bumetanide EP impurity D

CAS: 153012-65-8
Formula: C₂₁H₂₈N₂O₅S
MW: 420.5 g/mol

VQ-021013

Reference Standard

Bupivacaine EP Impurity A chemical structure

Bupivacaine EP Impurity A

CAS: 39627-98-0
Formula: C₁₄H₁₄N₂O
MW: 226.27 g/mol

VQ-021016

Reference Standard

Bupivacaine EP Impurity B chemical structure

Bupivacaine EP Impurity B

CAS: 15883-20-2
Formula: C₁₄H₂₀N₂O
MW: 232.32 g/mol

VQ-021017

Reference Standard

Bupivacaine EP Impurity B (HCl Salt) chemical structure

Bupivacaine EP Impurity B (HCl Salt)

CAS: 65797-42-4
Formula: C₁₄H₂₁ClN₂O
MW: 268.78 g/mol

VQ-036046

Reference Standard

Bupivacaine EP Impurity C chemical structure

Bupivacaine EP Impurity C

CAS: 1797894-80-4
Formula: C₁₄H₁₇NO
MW: 215.29 g/mol

VQ-021019

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