Skip to content

Product division

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

Obeticholic Acid Impurity E chemical structure

Obeticholic Acid Impurity E

CAS: 915038-25-4
Formula: C₂₆H₄₂O₄
MW: 418.6 g/mol

VQ-023312

Reference Standard

Obeticholic Acid Keto Ester Impurity

Obeticholic Acid Keto Ester Impurity

CAS: 2365472-77-9
Formula: C₃₀H₄₈O₅
MW: 488.7 g/mol

VQ-032225

Reference Standard

Obeticholic acid methyl ester chemical structure

Obeticholic acid methyl ester

CAS: 951694-73-8
Formula: C₂₇H₄₆O₄
MW: 434.7 g/mol

VQ-023311

Reference Standard

Obeticholic Acid TBS

Obeticholic Acid TBS

CAS: 1922968-40-8
Formula: C₃₂H₅₈O₄Si
MW: 534.89 g/mol

VQ-038707

Reference Standard

Obeticholic Acid Triol Impurity chemical structure

Obeticholic Acid Triol Impurity

CAS: 1537866-49-1
Formula: C₂₆H₄₆O₃
MW: 406.6 g/mol

VQ-026970

Reference Standard

Obeticholic Acid WS chemical structure

Obeticholic Acid WS

CAS: 459789-99-2
Formula: C₂₆H₄₄O₄
MW: 420.6 g/mol

In stock

Reference Standard

Obeticholic Acid-d5 chemical structure

Obeticholic Acid-d5

CAS: 1992000-80-2
Formula: C₂₆H₄₄O₄
MW: 425.7 g/mol

VQ-049283

Reference Standard

Obidoxime Chloride chemical structure

Obidoxime Chloride

CAS: 114-90-9
Formula: C₁₄H₁₆ClN₄O₃⁺
MW: 323.75 g/mol

VQ-038709

Reference Standard

Ochratoxin A chemical structure

CAS: 303-47-9
Formula: C₂₀H₁₈ClNO₆
MW: 403.8 g/mol

VQ-038710

Reference Standard

Ochratoxin A-D5 chemical structure

Ochratoxin A-D5

CAS: 666236-28-8
Formula: C₂₀H₁₈ClNO₆
MW: 408.8 g/mol

VQ-049284

Reference Standard

Oclacitinib chemical structure

CAS: 1208319-26-9
Formula: C₁₅H₂₃N₅O₂S
MW: 337.4 g/mol

VQ-038711

Reference Standard

Oclacitinib Maleate chemical structure

Oclacitinib Maleate

CAS: 1208319-27-0
Formula: C₁₉H₂₇N₅O₆S
MW: 453.5 g/mol

VQ-038713

Reference Standard

Oclacitinib-13C,d3 chemical structure

Oclacitinib-13C,d3

CAS: 2750534-84-8
Formula: C₁₅H₂₃N₅O₂S
MW: 341.45 g/mol

VQ-049289

Reference Standard

Octachlorodibenzo-p-dioxin chemical structure

Octachlorodibenzo-p-dioxin

CAS: 3268-87-9
Formula: C₁₂Cl₈O₂
MW: 459.7 g/mol

VQ-039048

Reference Standard

Octadecamethylcyclononasiloxane chemical structure

Octadecamethylcyclononasiloxane

CAS: 556-71-8
Formula: C₁₈H₅₄O₉Si₉
MW: 667.4 g/mol

VQ-032524

Reference Standard

Octakis-(6-bromo-6-deoxy)-γ-cyclodextrin chemical structure

Octakis-(6-bromo-6-deoxy)-γ-cyclodextrin

CAS: 53784-84-2
Formula: C₄₈H₇₂Br₈O₃₂
MW: 1800.3 g/mol

VQ-033958

Reference Standard

Octamethyl-1,7-tetrasiloxanediol chemical structure

Octamethyl-1,7-tetrasiloxanediol

CAS: 3081-07-0
Formula: C₈H₂₆O₅Si₄
MW: 314.63 g/mol

VQ-033859

Reference Standard

Octanoic acid-d15 chemical structure

Octanoic acid-d15

CAS: 69974-55-6
Formula: C₈H₁₆O₂
MW: 159.3 g/mol

VQ-041136

Reference Standard

Octenidine dihydrochloride chemical structure

Octenidine dihydrochloride

CAS: 70775-75-6
Formula: C₃₆H₆₄Cl₂N₄
MW: 623.8 g/mol

VQ-026973

Reference Standard

Octinoxate chemical structure

CAS: 5466-77-3
Formula: C₁₈H₂₆O₃
MW: 290.4 g/mol

VQ-026974

Reference Standard

Octreotide chemical structure

CAS: 83150-76-9
Formula: C₄₉H₆₆N₁₀O₁₀S₂
MW: 1019.2 g/mol

VQ-032227

Reference Standard

Octreotide Acetate chemical structure

Octreotide Acetate

CAS: 79517-01-4
Formula: C₅₃H₇₄N₁₀O₁₄S₂
MW: 1139.3 g/mol

VQ-023313

Reference Standard

Octreotide Diacetate chemical structure

Octreotide Diacetate

CAS: 622838-44-2
Formula: C₅₃H₇₄N₁₀O₁₄S₂
MW: 1139.3 g/mol

VQ-044162

Reference Standard

Octreotide EP Impurity A

Octreotide EP Impurity A

CAS: 87759-89-5
Formula: C₄₉H₆₆N₁₀O₁₀S₂
MW: 1019.2 g/mol

VQ-026978

Need a price, a spec or a custom compound?

Send us your list — product names or CAS numbers, grade, quantity and destination. Our team replies with a formal quotation, COA and lead time.

Request a quote Contact sales