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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.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

Tryptophan EP Impurity B chemical structure

Tryptophan EP Impurity B

CAS: 184955-21-3
Formula: C₁₁H₁₂N₂O₄
MW: 236.22 g/mol

VQ-034468

Reference Standard

Tryptophan EP Impurity C chemical structure

Tryptophan EP Impurity C

CAS: 2922-83-0
Formula: C₁₀H₁₂N₂O₃
MW: 208.21 g/mol

VQ-028558

Reference Standard

Tryptophan EP Impurity E chemical structure

Tryptophan EP Impurity E

CAS: 3978-11-8
Formula: C₁₁H₁₂N₂O₄
MW: 236.22 g/mol

VQ-034467

Reference Standard

Tryptophan EP Impurity F chemical structure

Tryptophan EP Impurity F

CAS: 145545-23-9
Formula: C₉H₁₂N₂O₂
MW: 180.2 g/mol

VQ-028564

Reference Standard

Tryptophan EP Impurity G (HCl Salt) chemical structure

Tryptophan EP Impurity G (HCl Salt)

CAS: 881025-90-7
Formula: C₁₁H₁₃ClN₂O₃
MW: 256.68 g/mol

VQ-044779

Reference Standard

Tryptophan EP Impurity H chemical structure

Tryptophan EP Impurity H

CAS: 6052-68-2
Formula: C₁₂H₁₂N₂O₂
MW: 216.24 g/mol

VQ-032454

Reference Standard

Tryptophan EP Impurity I chemical structure

Tryptophan EP Impurity I

CAS: 5470-37-1
Formula: C₁₃H₁₄N₂O₂
MW: 230.26 g/mol

VQ-028559

Reference Standard

Tryptophan EP Impurity J chemical structure

Tryptophan EP Impurity J

CAS: 164068-19-3
Formula: C₂₂H₂₃N₃O₄
MW: 393.4 g/mol

VQ-034469

Reference Standard

Tryptophan EP Impurity K chemical structure

Tryptophan EP Impurity K

CAS: 149724-31-2
Formula: C₂₀H₁₉N₃O₂
MW: 333.4 g/mol

VQ-028560

Reference Standard

Tryptophan EP Impurity L chemical structure

Tryptophan EP Impurity L

CAS: 287170-99-4
Formula: C₂₁H₁₉N₃O₂
MW: 345.4 g/mol

VQ-034466

Reference Standard

Tryptophol chemical structure

CAS: 526-55-6
Formula: C₁₀H₁₁NO
MW: 161.2 g/mol

VQ-032787

Reference Standard

Tubocurarine Chloride Pentahydrate chemical structure

Tubocurarine Chloride Pentahydrate

CAS: 6989-98-6
Formula: C₃₇H₅₂Cl₂N₂O₁₁
MW: 771.7 g/mol

VQ-042732

Reference Standard

Tucatinib chemical structure

CAS: 937263-43-9
Formula: C₂₆H₂₄N₈O₂
MW: 480.5 g/mol

In stock

Reference Standard

Tucatinib Dimethyl Impurity

Tucatinib Dimethyl Impurity

CAS: 3091639-36-7
Formula: C₂₄H₂₂N₈OS
MW: 470.55 g/mol

In stock

Reference Standard

Tucatinib Hemiethanolate chemical structure

Tucatinib Hemiethanolate

CAS: 1429755-56-5
Formula: C₅₄H₅₄N₁₆O₅
MW: 1007.1 g/mol

VQ-034471

Reference Standard

Tucatinib Impurity 11

Tucatinib Impurity 11

CAS: 2307628-65-3
Formula: C₁₃H₁₂N₄O₄
MW: 288.26 g/mol

VQ-042733

Reference Standard

Tucatinib Nitrophenoxy Pyridine Impurity chemical structure

Tucatinib Nitrophenoxy Pyridine Impurity

CAS: 864244-98-4
Formula: C₁₂H₁₁N₃O₃
MW: 245.23 g/mol

VQ-034472

Reference Standard

Tucatinib thiazolyl impurity chemical structure

Tucatinib thiazolyl impurity

CAS: 937266-01-8
Formula: C₂₆H₂₄N₈OS
MW: 496.6 g/mol

VQ-023941

Reference Standard

Tulathromycin A chemical structure

Tulathromycin A

CAS: 217500-96-4
Formula: C₄₁H₇₉N₃O₁₂
MW: 806.1 g/mol

VQ-034473

Reference Standard

Tulathromycin A Diastereomer chemical structure

Tulathromycin A Diastereomer

CAS: 217500-34-0
Formula: C₄₁H₇₉N₃O₁₂
MW: 806.1 g/mol

VQ-028568

Reference Standard

Tulathromycin Impurity 13 chemical structure

Tulathromycin Impurity 13

CAS: 371193-61-2
Formula: C₄₅H₇₄N₂O₁₄
MW: 867.1 g/mol

VQ-034474

Reference Standard

Tulathromycin Impurity B chemical structure

Tulathromycin Impurity B

CAS: 280755-12-6
Formula: C₄₁H₇₉N₃O₁₂
MW: 806.1 g/mol

VQ-028567

Reference Standard

Tulathromycin TA-3 Impurity

Tulathromycin TA-3 Impurity

CAS: 217649-77-9
Formula: C₄₆H₇₆N₂O₁₄
MW: 881.1 g/mol

VQ-042734

Reference Standard

Tulobuterol chemical structure

CAS: 41570-61-0
Formula: C₁₂H₁₈ClNO
MW: 227.73 g/mol

VQ-034477

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