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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

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Reference Standard

Norcyclobenzaprine chemical structure

Norcyclobenzaprine

CAS: 303-50-4
Formula: C₁₉H₁₉N
MW: 261.4 g/mol

VQ-023307

Reference Standard

Nordeprenyl chemical structure

CAS: 18913-84-3
Formula: C₁₂H₁₅N
MW: 173.25 g/mol

VQ-036615

Reference Standard

Nordihydro Capsaicin chemical structure

Nordihydro Capsaicin

CAS: 28789-35-7
Formula: C₁₇H₂₇NO₃
MW: 293.4 g/mol

VQ-021982

Reference Standard

Norelgestromin (E&Z Mixture) chemical structure

Norelgestromin (E&Z Mixture)

CAS: 53016-31-2
Formula: C₂₁H₂₉NO₂
MW: 327.5 g/mol

VQ-005394

Reference Standard

Norepinephrine Impurity 29 chemical structure

Norepinephrine Impurity 29

CAS: 1528622-09-4
Formula: C₉H₁₃NO₃
MW: 183.2 g/mol

VQ-049269

Reference Standard

Norepinephrine Impurity 40 chemical structure

Norepinephrine Impurity 40

CAS: 3569-19-5
Formula: C₈H₇NO₃
MW: 165.15 g/mol

VQ-038688

Reference Standard

Norepinephrine Sulfonic Acid chemical structure

Norepinephrine Sulfonic Acid

CAS: 24159-36-2
Formula: C₈H₁₁NO₅S
MW: 233.24 g/mol

VQ-023277

Reference Standard

Norethisterone hexenoate

Norethisterone hexenoate

CAS: 89094-33-7
Formula: C₂₆H₃₆O₃
MW: 396.6 g/mol

VQ-032209

Reference Standard

Norethisterone octoate

Norethisterone octoate

CAS: 120793-85-3
Formula: C₂₈H₄₀O₃
MW: 424.6 g/mol

VQ-038692

Reference Standard

Norketotifen chemical structure

CAS: 34580-20-6
Formula: C₁₈H₁₇NOS
MW: 295.4 g/mol

VQ-037821

Reference Standard

Norketotifen Hydrochloride chemical structure

Norketotifen Hydrochloride

CAS: 1227458-03-8
Formula: C₁₈H₁₈ClNOS
MW: 331.9 g/mol

VQ-037826

Reference Standard

Normetanephrine chemical structure

Normetanephrine

CAS: 97-31-4
Formula: C₉H₁₃NO₃
MW: 183.2 g/mol

VQ-038684

Reference Standard

Norneo Sildenafil chemical structure

Norneo Sildenafil

CAS: 371959-09-0
Formula: C₂₂H₂₉N₅O₄S
MW: 459.6 g/mol

VQ-044668

Reference Standard

Norneo Vardenafil chemical structure

Norneo Vardenafil

CAS: 358390-39-3
Formula: C₁₈H₂₀N₄O₄
MW: 356.4 g/mol

VQ-035385

Reference Standard

Notoginsenoside R1 chemical structure

Notoginsenoside R1

CAS: 80418-24-2
Formula: C₄₇H₈₀O₁₈
MW: 933.1 g/mol

VQ-039678

Reference Standard

NPOC-POC Tenofovir (Mixture of Diastereomers) chemical structure

NPOC-POC Tenofovir (Mixture of Diastereomers)

CAS: 1217542-13-6
Formula: C₁₉H₃₀N₅O₁₀P
MW: 519.4 g/mol

VQ-043316

Reference Standard

Nutriacholic Acid Methyl Ester chemical structure

Nutriacholic Acid Methyl Ester

CAS: 10538-59-7
Formula: C₂₅H₄₀O₄
MW: 404.6 g/mol

VQ-038706

Reference Standard

Nvp-abe171 chemical structure

CAS: 426268-06-6
Formula: C₂₁H₁₂N₄O₃
MW: 368.3 g/mol

VQ-044041

Reference Standard

Nylon 6,6 trimer chemical structure

Nylon 6,6 trimer

CAS: 4174-07-6
Formula: C₃₆H₆₆N₆O₆
MW: 678.9 g/mol

VQ-040666

Reference Standard

Nystatin A2 chemical structure

CAS: 65086-32-0
Formula: C₄₇H₇₅NO₁₆
MW: 910.1 g/mol

VQ-026965

Reference Standard

Nystatin Impurity 6

Nystatin Impurity 6

CAS: 89872-42-4
Formula: C₄₈H₇₇NO₁₇
MW: 940.12 g/mol

VQ-049279

Reference Standard

O-(2-Heptyl) Dabigatran Ethyl Ester chemical structure

O-(2-Heptyl) Dabigatran Ethyl Ester

CAS: 1610758-21-8
Formula: C₃₅H₄₃N₇O₅
MW: 641.8 g/mol

VQ-021199

Reference Standard

O-(3-Hexyl) Dabigatran Ethyl Ester

O-(3-Hexyl) Dabigatran Ethyl Ester

CAS: 1610758-22-9
Formula: C₃₄H₄₁N₇O₅
MW: 627.73 g/mol

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Reference Standard

O-(Benzo[d]thiazol-2-yl) (E)-2-(2-aminothiazol-4-yl)-2-(methoxyimino)ethanethioate chemical structure

O-(Benzo[d]thiazol-2-yl) (E)-2-(2-aminothiazol-4-yl)-2-(methoxyimino)ethanethioate

CAS: 959246-33-4
Formula: C₁₃H₁₀N₄O₂S₃
MW: 350.4 g/mol

VQ-044062

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