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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.

28,554products

6sub-categories

2,746in stock

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

Budesonide Impurity chemical structure

Budesonide Impurity

CAS: 910299-74-0
Formula: C₁₉H₂₄O₄
MW: 316.4 g/mol

VQ-021915

Reference Standard

Budesonide Impurity (RRT-1.1) chemical structure

Budesonide Impurity (RRT-1.1)

CAS: 85234-64-6
Formula: C₂₃H₃₀O₅
MW: 386.5 g/mol

VQ-004561

Reference Standard

Budesonide Impurity 11 chemical structure

Budesonide Impurity 11

CAS: 3949-79-9
Formula: C₂₃H₂₈O₇
MW: 416.5 g/mol

VQ-028925

Reference Standard

Budesonide Impurity 4 chemical structure

Budesonide Impurity 4

CAS: 77017-17-5
Formula: C₂₁H₂₆O₅
MW: 358.4 g/mol

VQ-035000

Reference Standard

Budesonide Propionaldehyde Impurity chemical structure

Budesonide Propionaldehyde Impurity

CAS: 68293-09-4
Formula: C₂₄H₃₂O₆
MW: 416.5 g/mol

VQ-044160

Reference Standard

Budesonide WS chemical structure

CAS: 51333-22-3
Formula: C₂₅H₃₄O₆
MW: 430.5 g/mol

In stock

Reference Standard

Budesonide-d6 chemical structure

CAS: 1134189-63-1
Formula: C₂₅H₃₄O₆
MW: 436.6 g/mol

VQ-029531

Reference Standard

Budesonide-d8 chemical structure

CAS: 1105542-94-6
Formula: C₂₅H₃₄O₆
MW: 438.6 g/mol

VQ-029530

Reference Standard

Bufexamac chemical structure

CAS: 2438-72-4
Formula: C₁₂H₁₇NO₃
MW: 223.27 g/mol

VQ-024678

Reference Standard

Bufexamac EP Impurity A chemical structure

Bufexamac EP Impurity A

CAS: 4547-57-3
Formula: C₁₂H₁₆O₃
MW: 208.25 g/mol

VQ-034797

Reference Standard

Bufexamac EP Impurity B chemical structure

Bufexamac EP Impurity B

CAS: 29056-06-2
Formula: C₁₃H₁₈O₃
MW: 222.28 g/mol

VQ-034798

Reference Standard

Bufexamac EP Impurity C chemical structure

Bufexamac EP Impurity C

CAS: 1185726-73-1
Formula: C₁₆H₂₄O₃
MW: 264.36 g/mol

VQ-043082

Reference Standard

Bufexamac EP Impurity D chemical structure

Bufexamac EP Impurity D

CAS: 3413-59-0
Formula: C₁₂H₁₇NO₂
MW: 207.27 g/mol

VQ-043083

Reference Standard

Buflomedil Hydrochloride - Impurity B (FreeBase) chemical structure

Buflomedil Hydrochloride - Impurity B (FreeBase)

CAS: 79967-07-0
Formula: C₁₆H₂₃NO₄
MW: 293.36 g/mol

VQ-043854

Reference Standard

Bufotenine chemical structure

CAS: 487-93-4
Formula: C₁₂H₁₆N₂O
MW: 204.27 g/mol

VQ-045186

Reference Standard

Bufuralol Hydrochloride chemical structure

Bufuralol Hydrochloride

CAS: 60398-91-6
Formula: C₁₆H₂₄ClNO₂
MW: 297.82 g/mol

VQ-029532

Reference Standard

Bumetanide EP Impurity A chemical structure

Bumetanide EP Impurity A

CAS: 28328-53-2
Formula: C₁₃H₁₀N₂O₇S
MW: 338.29 g/mol

VQ-021917

Reference Standard

Bumetanide EP Impurity B chemical structure

Bumetanide EP Impurity B

CAS: 28328-54-3
Formula: C₁₃H₁₂N₂O₅S
MW: 308.31 g/mol

VQ-021012

Reference Standard

Bumetanide EP Impurity C chemical structure

Bumetanide EP Impurity C

CAS: 32643-00-8
Formula: C₂₁H₂₈N₂O₅S
MW: 420.5 g/mol

VQ-021015

Reference Standard

Bumetanide EP impurity D chemical structure

Bumetanide EP impurity D

CAS: 153012-65-8
Formula: C₂₁H₂₈N₂O₅S
MW: 420.5 g/mol

VQ-021013

Reference Standard

Bumetanide WS chemical structure

CAS: 28395-03-1
Formula: C₁₇H₂₀N₂O₅S
MW: 364.4 g/mol

In stock

Reference Standard

Bumetanide-d5 chemical structure

CAS: 1216739-35-3
Formula: C₁₇H₂₀N₂O₅S
MW: 369.4 g/mol

VQ-029536

Reference Standard

Bumetanide-β-D-Glucuronide chemical structure

Bumetanide-β-D-Glucuronide

CAS: 102623-14-3
Formula: C₂₃H₂₈N₂O₁₁S
MW: 540.5 g/mol

VQ-021918

Reference Standard

Buparvaquone chemical structure

CAS: 88426-33-9
Formula: C₂₁H₂₆O₃
MW: 326.4 g/mol

VQ-029537

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