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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

Nisoldipine Impurity A chemical structure

Nisoldipine Impurity A

CAS: 21829-25-4
Formula: C₁₇H₁₈N₂O₆
MW: 346.3 g/mol

VQ-005391

Reference Standard

Nisoldipine Impurity F chemical structure

Nisoldipine Impurity F

Formula: C₂₀H₂₄N₂O₆
MW: 388.4 g/mol

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Reference Standard

Nitenpyram Impurity 4

Nitenpyram Impurity 4

CAS: 2514962-80-0
Formula: C₁₄H₁₅Cl₂N₃
MW: 296.2 g/mol

VQ-032185

Reference Standard

Nitrendipine Dipropyl Ester chemical structure

Nitrendipine Dipropyl Ester

CAS: 77888-05-2
Formula: C₂₁H₂₆N₂O₆
MW: 402.4 g/mol

VQ-026405

Reference Standard

Nitrendipine Propyl Ester chemical structure

Nitrendipine Propyl Ester

CAS: 225785-54-6
Formula: C₁₉H₂₂N₂O₆
MW: 374.4 g/mol

VQ-026931

Reference Standard

Nitrilotriacetamide chemical structure

Nitrilotriacetamide

CAS: 4862-18-4
Formula: C₆H₁₂N₄O₃
MW: 188.18 g/mol

VQ-047365

Reference Standard

Nitrofurantoin Impurity 9 chemical structure

Nitrofurantoin Impurity 9

CAS: 99409-14-0
Formula: C₆H₁₁N₃O
MW: 141.17 g/mol

VQ-049265

Reference Standard

Nitrofurantoin Related Compound A chemical structure

Nitrofurantoin Related Compound A

CAS: 63981-22-6
Formula: C₈H₈N₄O₆
MW: 256.17 g/mol

VQ-005393

Reference Standard

Nitrofurazone chemical structure

CAS: 59-87-0
Formula: C₆H₆N₄O₄
MW: 198.14 g/mol

VQ-026932

Reference Standard

Nitroproparacaine Hydrochloride chemical structure

Nitroproparacaine Hydrochloride

CAS: 35288-46-1
Formula: C₁₆H₂₅ClN₂O₅
MW: 360.8 g/mol

VQ-027657

Reference Standard

Nitropropoxybenzoic Acid chemical structure

Nitropropoxybenzoic Acid

CAS: 35288-44-9
Formula: C₁₀H₁₁NO₅
MW: 225.2 g/mol

VQ-027656

Reference Standard

Nizatidine Impurity X

Nizatidine Impurity X

CAS: 1193434-64-8
Formula: C₁₉H₃₁N₇O₂S₃
MW: 485.68 g/mol

VQ-032199

Reference Standard

Nomegestrol 6-Formyl Impurity

Nomegestrol 6-Formyl Impurity

CAS: 147508-40-5
Formula: C₂₅H₃₄O₅
MW: 414.5 g/mol

VQ-028953

Reference Standard

Non-4-enedioic Acid

Non-4-enedioic Acid

CAS: 1002-20-6
Formula: C₉H₁₄O₄
MW: 186.21 g/mol

VQ-047510

Reference Standard

Nonaethylene glycol monotridecyl ether chemical structure

Nonaethylene glycol monotridecyl ether

CAS: 7300-80-3
Formula: C₃₁H₆₄O₁₀
MW: 596.8 g/mol

VQ-041050

Reference Standard

Nonivamide dimer impurity chemical structure

Nonivamide dimer impurity

CAS: 859171-95-2
Formula: C₃₄H₅₂N₂O₆
MW: 584.8 g/mol

VQ-045343

Reference Standard

Nonylphenol chemical structure

CAS: 84852-15-3
Formula: C₁₅H₂₄O
MW: 220.35 g/mol

VQ-039769

Reference Standard

Nor Cholic Acid chemical structure

Nor Cholic Acid

CAS: 60696-62-0
Formula: C₂₃H₃₈O₅
MW: 394.5 g/mol

VQ-036235

Reference Standard

Noradrenaline chemical structure

CAS: 51-41-2
Formula: C₈H₁₁NO₃
MW: 169.18 g/mol

VQ-020744

Reference Standard

Noradrenaline bitartrate chemical structure

Noradrenaline bitartrate

CAS: 69815-49-2
Formula: C₁₂H₁₉NO₁₀
MW: 337.28 g/mol

VQ-038678

Reference Standard

Noradrenaline Tartrate chemical structure

Noradrenaline Tartrate

CAS: 51-40-1
Formula: C₁₂H₁₇NO₉
MW: 319.26 g/mol

VQ-026949

Reference Standard

Noradrenochrome chemical structure

Noradrenochrome

CAS: 490-89-1
Formula: C₈H₇NO₃
MW: 165.15 g/mol

VQ-026947

Reference Standard

Norandrostenedione Enol Ether

Norandrostenedione Enol Ether

CAS: 81176-86-5
Formula: C₂₀H₃₀O₂
MW: 302.45 g/mol

VQ-038019

Reference Standard

Norandrostenedione-3-ethyldienol Ether chemical structure

Norandrostenedione-3-ethyldienol Ether

CAS: 2863-88-9
Formula: C₂₀H₂₈O₂
MW: 300.4 g/mol

VQ-032210

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