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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

Ulinastatin

CAS: 80449-31-6
Formula: C₁₃H₁₆O₃
MW: 220.26 g/mol

VQ-042750

Reference Standard

Ulipristal chemical structure

CAS: 159811-51-5
Formula: C₂₈H₃₅NO₃
MW: 433.6 g/mol

VQ-034485

Reference Standard

Ulipristal Acetate chemical structure

Ulipristal Acetate

CAS: 126784-99-4
Formula: C₃₀H₃₇NO₄
MW: 475.6 g/mol

VQ-034482

Reference Standard

Ulipristal Acetate N-Oxide Impurity

Ulipristal Acetate N-Oxide Impurity

CAS: 1927850-00-7
Formula: C₃₀H₃₇NO₅
MW: 491.6 g/mol

VQ-034484

Reference Standard

Ulipristal Impurity 6 chemical structure

Ulipristal Impurity 6

CAS: 730962-28-4
Formula: C₃₂H₄₃NO₆
MW: 537.7 g/mol

VQ-042751

Reference Standard

Ultramark 1621 chemical structure

CAS: 105809-15-2
Formula: C₆H₁₈N₃P₃
MW: 231.19 g/mol

VQ-039061

Reference Standard

Umckalin chemical structure

CAS: 43053-62-9
Formula: C₁₁H₁₀O₅
MW: 222.19 g/mol

VQ-032348

Reference Standard

Umeclidinium Bromide chemical structure

Umeclidinium Bromide

CAS: 869113-09-7
Formula: C₂₉H₃₄BrNO₂
MW: 508.5 g/mol

VQ-023946

Reference Standard

Umeclidinium Bromide Pyridinyl Ketone Impurity chemical structure

Umeclidinium Bromide Pyridinyl Ketone Impurity

CAS: 72034-25-4
Formula: C₁₂H₁₀ClNO
MW: 219.66 g/mol

VQ-042752

Reference Standard

Umifenovir chemical structure

CAS: 131707-25-0
Formula: C₂₂H₂₅BrN₂O₃S
MW: 477.4 g/mol

VQ-023949

Reference Standard

Undecanedioic Acid chemical structure

Undecanedioic Acid

CAS: 1852-04-6
Formula: C₁₁H₂₀O₄
MW: 216.27 g/mol

VQ-024467

Reference Standard

Undecanoic Acid chemical structure

Undecanoic Acid

CAS: 112-37-8
Formula: C₁₁H₂₂O₂
MW: 186.29 g/mol

VQ-039498

Reference Standard

Unii-4370DF050B chemical structure

Unii-4370DF050B

CAS: 100403-19-8
Formula: C₃₆H₇₁NO₄
MW: 582 g/mol

VQ-032482

Reference Standard

Unithiol chemical structure

CAS: 4076-02-2
Formula: C₃H₇NaO₃S₃
MW: 210.3 g/mol

VQ-040955

Reference Standard

Upadacitinib Cyclized Impurity chemical structure

Upadacitinib Cyclized Impurity

CAS: 1708997-42-5
Formula: C₂₉H₂₉N₅O₄S
MW: 543.6 g/mol

VQ-028583

Reference Standard

Upadacitinib Enantiomer chemical structure

Upadacitinib Enantiomer

CAS: 1310726-59-0
Formula: C₁₇H₁₉F₃N₆O
MW: 380.4 g/mol

VQ-023952

Reference Standard

Upadacitinib Hydrate chemical structure

Upadacitinib Hydrate

CAS: 2050057-56-0
Formula: C₃₄H₄₀F₆N₁₂O₃
MW: 778.8 g/mol

VQ-007826

Reference Standard

Upadacitinib Impurity 10 chemical structure

Upadacitinib Impurity 10

CAS: 2304514-69-8
Formula: C₁₆H₂₀BrNO₃
MW: 354.24 g/mol

VQ-034490

Reference Standard

Upadacitinib Methyl Carbamate Impurity chemical structure

Upadacitinib Methyl Carbamate Impurity

CAS: 2408790-02-1
Formula: C₁₅H₁₄N₄O₄S
MW: 346.4 g/mol

VQ-034496

Reference Standard

Upadacitinib Monoacetyl Impurity chemical structure

Upadacitinib Monoacetyl Impurity

CAS: 18262-01-6
Formula: C₆H₈O₇
MW: 192.12 g/mol

In stock

Reference Standard

Upadacitinib WS chemical structure

Upadacitinib WS

CAS: 1310726-60-3
Formula: C₁₇H₁₉F₃N₆O
MW: 380.4 g/mol

In stock

Reference Standard

Uracil-1,3 D2 chemical structure

CAS: 20666-60-8
Formula: C₄H₄N₂O₂
MW: 114.1 g/mol

VQ-048779

Reference Standard

Urapidil chemical structure

CAS: 34661-75-1
Formula: C₂₀H₂₉N₅O₃
MW: 387.5 g/mol

VQ-028589

Reference Standard

Urapidil Hydrochloride chemical structure

Urapidil Hydrochloride

CAS: 64887-14-5
Formula: C₂₀H₃₀ClN₅O₃
MW: 423.9 g/mol

VQ-042757

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