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Impurities & Reference Standards

Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.

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COA + SDSwith every lot

API Impurities 14,252 Pharmacopeial Impurities (EP / USP / BP) 4,401 Nitrosamine Impurities 650 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612 Metabolites & Degradation Products 4,146 API Reference Standards 3,493

Reference Standard

Isomannide Dinitrate chemical structure

Isomannide Dinitrate

CAS: 551-43-9
Formula: C₆H₈N₂O₈
MW: 236.14 g/mol

VQ-032472

Reference Standard

Isometamidium Chloride Hydrochloride chemical structure

Isometamidium Chloride Hydrochloride

CAS: 6798-24-9
Formula: C₂₈H₂₇Cl₂N₇
MW: 532.5 g/mol

VQ-031261

Reference Standard

Isometheptane Mucate chemical structure

Isometheptane Mucate

CAS: 7492-31-1
Formula: C₂₄H₄₈N₂O₈
MW: 492.6 g/mol

VQ-031262

Reference Standard

Isometheptene chemical structure

CAS: 503-01-5
Formula: C₉H₁₉N
MW: 141.25 g/mol

VQ-031263

Reference Standard

Isometheptene BP Impurity A chemical structure

Isometheptene BP Impurity A

CAS: 503-00-4
Formula: C₉H₂₁N
MW: 143.27 g/mol

VQ-031264

Reference Standard

Isometheptene Impurity 3 chemical structure

Isometheptene Impurity 3

CAS: 859444-64-7
Formula: C₁₁H₂₀O
MW: 168.28 g/mol

VQ-045327

Reference Standard

Isometheptene Impurity E chemical structure

Isometheptene Impurity E

CAS: 4436-89-9
Formula: C₉H₂₁NO
MW: 159.27 g/mol

VQ-037746

Reference Standard

Isonaringin chemical structure

CAS: 108815-81-2
Formula: C₂₇H₃₂O₁₄
MW: 580.5 g/mol

VQ-031265

Reference Standard

Isoniazid Acetone adduct chemical structure

Isoniazid Acetone adduct

CAS: 4813-04-1
Formula: C₉H₁₁N₃O
MW: 177.2 g/mol

VQ-040052

Reference Standard

Isoniazid EP Impurity D chemical structure

Isoniazid EP Impurity D

CAS: 553-53-7
Formula: C₆H₇N₃O
MW: 137.14 g/mol

VQ-022869

Reference Standard

Isoniazid Ethylene Dimer Impurity at RRT 1.62

Isoniazid Ethylene Dimer Impurity at RRT 1.62

CAS: 27853-51-6
Formula: C₁₄H₁₆N₆O₂
MW: 300.32 g/mol

VQ-026236

Reference Standard

Isoniazid Impurity 1 chemical structure

Isoniazid Impurity 1

CAS: 15420-02-7
Formula: C₁₂H₈N₄O
MW: 224.22 g/mol

VQ-045328

Reference Standard

Isoniazid-d4 chemical structure

CAS: 774596-24-6
Formula: C₆H₇N₃O
MW: 141.16 g/mol

VQ-031266

Reference Standard

Isonitrosoacetone chemical structure

Isonitrosoacetone

CAS: 306-44-5
Formula: C₃H₅NO₂
MW: 87.08 g/mol

VQ-049943

Reference Standard

Isonitrosoacetophenone chemical structure

Isonitrosoacetophenone

CAS: 532-54-7
Formula: C₈H₇NO₂
MW: 149.15 g/mol

VQ-050636

Reference Standard

Isoorientin chemical structure

CAS: 4261-42-1
Formula: C₂₁H₂₀O₁₁
MW: 448.4 g/mol

VQ-026238

Reference Standard

Isopenicillin N chemical structure

Isopenicillin N

CAS: 58678-43-6
Formula: C₁₄H₂₁N₃O₆S
MW: 359.4 g/mol

VQ-041390

Reference Standard

Isopenillic acid chemical structure

Isopenillic acid

CAS: 90962-63-3
Formula: C₁₆H₁₈N₂O₄S
MW: 334.4 g/mol

VQ-033099

Reference Standard

Isopilocarpine Hydrochloride chemical structure

Isopilocarpine Hydrochloride

CAS: 28958-85-2
Formula: C₁₁H₁₇ClN₂O₂
MW: 244.72 g/mol

VQ-033179

Reference Standard

Isopilocarpinic acid chemical structure

Isopilocarpinic acid

CAS: 34350-99-7
Formula: C₁₁H₁₈N₂O₃
MW: 226.27 g/mol

VQ-023489

Reference Standard

Isopimaric acid chemical structure

Isopimaric acid

CAS: 5835-26-7
Formula: C₂₀H₃₀O₂
MW: 302.5 g/mol

VQ-040893

Reference Standard

Isopimpinellin chemical structure

CAS: 482-27-9
Formula: C₁₃H₁₀O₅
MW: 246.21 g/mol

VQ-031268

Reference Standard

Isoprenaline EP impurity A Hydrochloride chemical structure

Isoprenaline EP impurity A Hydrochloride

CAS: 16899-81-3
Formula: C₁₁H₁₆ClNO₃
MW: 245.7 g/mol

VQ-031269

Reference Standard

Isopropamide Iodide chemical structure

Isopropamide Iodide

CAS: 71-81-8
Formula: C₂₃H₃₃IN₂O
MW: 480.4 g/mol

VQ-031276

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