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Impurity Reference Standards

Pharmacopoeial impurities, nitrosamines, metabolites, labelled internal standards and API working standards, each backed by analytical data for method development and QC.

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Buprenorphine Related Compound A CII(Secondary Standards traceble to USP)

CAS: 457071-73-7
Formula: C₂₉H₄₁NO₄
MW: 467.6 g/mol

ZX-032960

Bupropion

CAS: 34911-55-2
Formula: C₁₃H₁₈ClNO
MW: 239.74 g/mol

ZX-036440

Bupropion 2-Bromo Impurity

CAS: 34911-51-8
Formula: C₉H₈BrClO
MW: 247.51 g/mol

ZX-004473

Bupropion 3,5-Dichloro Impurity

CAS: 1193779-48-4
Formula: C₁₃H₁₇Cl₂NO
MW: 274.18 g/mol

ZX-023683

Bupropion Deschloro-3'-2 bromo impurity

CAS: 76650-08-3
Formula: C₉H₈Br₂O
MW: 291.97 g/mol

ZX-023685

Bupropion Dibromo Impurity

CAS: 2357953-00-3
Formula: C₉H₇Br₂ClO
MW: 326.41 g/mol

ZX-020960

Bupropion Dihydro (S,S)-Isomer (HCl)

CAS: 102141-12-8
Formula: C₁₃H₂₀ClNO
MW: 241.76 g/mol

ZX-047964

Bupropion Hydrobromide

CAS: 905818-69-1
Formula: C₁₃H₁₉BrClNO
MW: 320.65 g/mol

ZX-036542

Bupropion Hydrochloride

CAS: 31677-93-7
Formula: C₁₃H₁₉Cl₂NO
MW: 276.2 g/mol

ZX-020957

Bupropion Impurity 20

CAS: 1261791-08-5
Formula: C₉H₇BrCl₂O
MW: 281.96 g/mol

ZX-028377

Bupropion R Isomer

CAS: 437723-96-1
Formula: C₁₃H₁₈ClNO
MW: 239.74 g/mol

ZX-023686

Bupropion USP Related Compound A

CAS: 1049718-72-0
Formula: C₁₃H₁₉Cl₂NO
MW: 276.2 g/mol

ZX-020078

Bupropion USP Related Compound B (Hcl Salt)

CAS: 1049718-43-5
Formula: C₁₃H₁₉BrClNO
MW: 320.65 g/mol

ZX-020079

Bupropion USP Related Compound C

CAS: 152943-33-4
Formula: C₉H₉ClO₂
MW: 184.62 g/mol

ZX-020080

Bupropion USP Related Compound D (HCl Salt)

CAS: 63199-74-6
Formula: C₁₃H₂₀ClNO
MW: 241.76 g/mol

ZX-020081

Bupropion USP Related Compound E

CAS: 10557-17-2
Formula: C₉H₇ClO₂
MW: 182.6 g/mol

ZX-020082

Bupropion USP Related Compound F

CAS: 857233-13-7
Formula: C₉H₉ClO₂
MW: 184.62 g/mol

ZX-019745

Bupropion-d9 Hydrochloride

CAS: 1189725-26-5
Formula: C₁₃H₁₉Cl₂NO
MW: 285.25 g/mol

ZX-028378

Buserelin

CAS: 57982-77-1
Formula: C₆₀H₈₆N₁₆O₁₃
MW: 1239.4 g/mol

ZX-028382

Buserelin EP Impurity A

CAS: 1872434-99-5
Formula: C₆₂H₉₀N₁₆O₁₅
MW: 1299.5 g/mol

ZX-028383

Buserelin EP Impurity B

CAS: 1926163-21-4
Formula: C₆₀H₈₆N₁₆O₁₃
MW: 1239.4 g/mol

ZX-023688

Buserelin EP Impurity C

CAS: 70280-55-6
Formula: C₄₉H₇₄N₁₂O₁₀
MW: 991.2 g/mol

ZX-023689

Buserelin EP Impurity E (Free Base)

CAS: 1926163-20-3
Formula: C₆₀H₈₆N₁₆O₁₃
MW: 1239.4 g/mol

ZX-023687

Buspirone

CAS: 36505-84-7
Formula: C₂₁H₃₁N₅O₂
MW: 385.5 g/mol

ZX-036649

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