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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.

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Reference Standard

Ondansetron Hydrochloride Dihydrate EP Impurity H (Maleate Salt)

Ondansetron Hydrochloride Dihydrate EP Impurity H (Maleate Salt)

CAS: 99614-15-0
Formula: C₁₇H₁₇N₃O : C₄H₄O₄
MW: 395.42 g/mol

VQ-032270

Reference Standard

Ondansetron USP Related Compound A chemical structure

Ondansetron USP Related Compound A

CAS: 119812-29-2
Formula: C₁₆H₂₁ClN₂O
MW: 292.8 g/mol

VQ-027017

Reference Standard

Orbifloxacin EP Impurity C chemical structure

Orbifloxacin EP Impurity C

CAS: 126457-99-6
Formula: C₁₉H₂₁F₂N₃O₃
MW: 377.4 g/mol

VQ-027026

Reference Standard

Orbifloxacin EP Impurity D chemical structure

Orbifloxacin EP Impurity D

CAS: 126458-22-8
Formula: C₁₉H₂₁F₂N₃O₄
MW: 393.4 g/mol

VQ-032272

Reference Standard

Orbifloxacin EP Impurity E chemical structure

Orbifloxacin EP Impurity E

CAS: 2817522-38-4
Formula: C₁₉H₂₀F₃N₃O₃
MW: 395.4 g/mol

VQ-032273

Reference Standard

Orbifloxacin EP Impurity F chemical structure

Orbifloxacin EP Impurity F

CAS: 106890-70-4
Formula: C₁₃H₇F₄NO₃
MW: 301.19 g/mol

VQ-027027

Reference Standard

Orbifloxacin EP Impurity G chemical structure

Orbifloxacin EP Impurity G

CAS: 166323-26-8
Formula: C₁₈H₂₀F₃N₃O
MW: 351.4 g/mol

VQ-032274

Reference Standard

Orciprenaline EP Impurity B chemical structure

Orciprenaline EP Impurity B

CAS: 94200-14-3
Formula: C₁₁H₁₅NO₃
MW: 209.24 g/mol

VQ-027029

Reference Standard

Orciprenaline Sulfate EP Impurity A chemical structure

Orciprenaline Sulfate EP Impurity A

CAS: 70988-89-5
Formula: C₁₂H₁₇NO₃
MW: 223.27 g/mol

VQ-027028

Reference Standard

Orlistat USP Related Compound D chemical structure

Orlistat USP Related Compound D

CAS: 130793-27-0
Formula: C₂₉H₅₃NO₅
MW: 495.7 g/mol

VQ-027031

Reference Standard

Orphenadrine EP Impurity A chemical structure

Orphenadrine EP Impurity A

CAS: 5472-13-9
Formula: C₁₄H₁₄O
MW: 198.26 g/mol

VQ-027045

Reference Standard

Orphenadrine EP impurity C chemical structure

Orphenadrine EP impurity C

CAS: 17349-96-1
Formula: C₁₆H₁₉NO
MW: 241.33 g/mol

VQ-027047

Reference Standard

Orphenadrine EP Impurity E chemical structure

Orphenadrine EP Impurity E

CAS: 21945-86-8
Formula: C₁₈H₂₃NO
MW: 269.4 g/mol

VQ-032292

Reference Standard

Orphenadrine USP Related Compound B chemical structure

Orphenadrine USP Related Compound B

CAS: 93940-17-1
Formula: C₂₀H₂₈ClNO
MW: 333.9 g/mol

VQ-027046

Reference Standard

Orphenadrine USP Related Compound C chemical structure

Orphenadrine USP Related Compound C

CAS: 10488-36-5
Formula: C₁₇H₂₂ClNO
MW: 291.8 g/mol

VQ-032289

Reference Standard

Oseltamivir EP Impurity A chemical structure

Oseltamivir EP Impurity A

CAS: 1364932-19-3
Formula: C₁₄H₂₄N₂O₄
MW: 284.35 g/mol

VQ-027050

Reference Standard

Oseltamivir EP Impurity B chemical structure

Oseltamivir EP Impurity B

CAS: 1052063-38-3
Formula: C₁₆H₃₀N₂O₄
MW: 314.42 g/mol

VQ-043512

Reference Standard

Oseltamivir EP Impurity C chemical structure

Oseltamivir EP Impurity C

CAS: 187227-45-8
Formula: C₁₄H₂₄N₂O₄
MW: 284.35 g/mol

VQ-027049

Reference Standard

Oseltamivir EP Impurity C Hydrochloride chemical structure

Oseltamivir EP Impurity C Hydrochloride

CAS: 1415963-60-8
Formula: C₁₄H₂₅ClN₂O₄
MW: 320.81 g/mol

VQ-049349

Reference Standard

Oseltamivir EP Impurity D chemical structure

Oseltamivir EP Impurity D

CAS: 1346604-18-9
Formula: C₁₁H₁₃NO₄
MW: 223.22 g/mol

VQ-023344

Reference Standard

Oseltamivir EP Impurity E chemical structure

Oseltamivir EP Impurity E

CAS: 208720-71-2
Formula: C₁₅H₂₆N₂O₄
MW: 298.38 g/mol

VQ-027051

Reference Standard

Oseltamivir EP Impurity F chemical structure

Oseltamivir EP Impurity F

CAS: 1052063-37-2
Formula: C₁₅H₂₆N₂O₄
MW: 298.38 g/mol

VQ-023346

Reference Standard

Oseltamivir EP Impurity G chemical structure

Oseltamivir EP Impurity G

CAS: 956267-10-0
Formula: C₁₆H₂₈N₂O₄
MW: 312.4 g/mol

VQ-023345

Reference Standard

Oseltamivir EP Impurity H chemical structure

Oseltamivir EP Impurity H

CAS: 814-29-9
Formula: C₁₂H₂₇OP
MW: 218.32 g/mol

VQ-027052

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