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

D-Phenylalanyl-D-leucine chemical structure

D-Phenylalanyl-D-leucine

CAS: 123442-34-2
Formula: C₁₅H₂₂N₂O₃
MW: 278.35 g/mol

VQ-030196

Reference Standard

D-Phenylalanyl-D-phenylalanyl-D-leucine

D-Phenylalanyl-D-phenylalanyl-D-leucine

CAS: 2219351-85-4
Formula: C₂₄H₃₁N₃O₄
MW: 425.52 g/mol

VQ-048016

Reference Standard

D-Phenylglycinamide chemical structure

D-Phenylglycinamide

CAS: 6485-67-2
Formula: C₈H₁₀N₂O
MW: 150.18 g/mol

VQ-024906

Reference Standard

D-Pyroglutamic Acid chemical structure

D-Pyroglutamic Acid

CAS: 4042-36-8
Formula: C₅H₇NO₃
MW: 129.11 g/mol

VQ-038996

Reference Standard

D-Ser4-Triptorelin chemical structure

D-Ser4-Triptorelin

CAS: 102992-39-2
Formula: C₆₆H₈₃F₃N₁₈O₁₅
MW: 1425.5 g/mol

VQ-028549

Reference Standard

D-Serine Methyl Ester Hydrochloride chemical structure

D-Serine Methyl Ester Hydrochloride

CAS: 5874-57-7
Formula: C₄H₁₀ClNO₃
MW: 155.58 g/mol

VQ-029958

Reference Standard

D-Tagatopyranose chemical structure

D-Tagatopyranose

CAS: 41847-61-4
Formula: C₆H₁₂O₆
MW: 180.16 g/mol

VQ-048775

Reference Standard

D-threo-(-)-2-Amino-1-(4-nitrophenyl)-1,3-propanediol chemical structure

D-threo-(-)-2-Amino-1-(4-nitrophenyl)-1,3-propanediol

CAS: 716-61-0
Formula: C₉H₁₂N₂O₄
MW: 212.2 g/mol

VQ-024925

Reference Standard

D-Thyroxine chemical structure

CAS: 51-49-0
Formula: C₁₅H₁₁I₄NO₄
MW: 776.87 g/mol

VQ-032476

Reference Standard

D-Tryptophan Methyl Ester Hydrochloride chemical structure

D-Tryptophan Methyl Ester Hydrochloride

CAS: 14907-27-8
Formula: C₁₂H₁₅ClN₂O₂
MW: 254.71 g/mol

VQ-034023

Reference Standard

D-Valacyclovir Hydrochloride chemical structure

D-Valacyclovir Hydrochloride

CAS: 124832-28-6
Formula: C₁₃H₂₁ClN₆O₄
MW: 360.8 g/mol

VQ-034515

Reference Standard

D-Valganciclovir Hydrochloride chemical structure

D-Valganciclovir Hydrochloride

CAS: 1393911-57-3
Formula: C₁₄H₂₃ClN₆O₅
MW: 390.82 g/mol

VQ-023962

Reference Standard

D-Valine Methyl Ester Hydrochloride chemical structure

D-Valine Methyl Ester Hydrochloride

CAS: 7146-15-8
Formula: C₆H₁₄ClNO₂
MW: 167.63 g/mol

VQ-043594

Reference Standard

D-Valsartan methyl ester chemical structure

D-Valsartan methyl ester

CAS: 137863-48-0
Formula: C₂₅H₃₁N₅O₃
MW: 449.5 g/mol

VQ-034537

Reference Standard

D-Xylo-2-hexulosonic Acid Methyl Ester chemical structure

D-Xylo-2-hexulosonic Acid Methyl Ester

CAS: 67776-07-2
Formula: C₇H₁₂O₇
MW: 208.17 g/mol

VQ-021251

Reference Standard

D-Xylonic Acid Calcium Salt Hydrate chemical structure

D-Xylonic Acid Calcium Salt Hydrate

CAS: 72656-08-7
Formula: C₁₀H₂₂CaO₁₄
MW: 406.35 g/mol

VQ-050129

Reference Standard

D,L-Carnitine-d3 Chloride chemical structure

D,L-Carnitine-d3 Chloride

CAS: 119766-67-5
Formula: C₇H₁₆ClNO₃
MW: 200.68 g/mol

VQ-048865

Reference Standard

D,L-Dropropizine N-Oxide chemical structure

D,L-Dropropizine N-Oxide

CAS: 152323-00-7
Formula: C₁₃H₂₀N₂O₃
MW: 252.31 g/mol

VQ-026440

Reference Standard

D,L-N,N-Didesmethyl-O-desmethyl Venlafaxine chemical structure

D,L-N,N-Didesmethyl-O-desmethyl Venlafaxine

CAS: 149289-29-2
Formula: C₁₄H₂₁NO₂
MW: 235.32 g/mol

VQ-023994

Reference Standard

D,L-N,N-Didesmethyl-o-desmethyl venlafaxine hydrochloride chemical structure

D,L-N,N-Didesmethyl-o-desmethyl venlafaxine hydrochloride

CAS: 135308-76-8
Formula: C₁₄H₂₂ClNO₂
MW: 271.78 g/mol

VQ-043782

Reference Standard

D,L-O-Desmethyl Venlafaxine N-Oxide chemical structure

D,L-O-Desmethyl Venlafaxine N-Oxide

CAS: 1021933-95-8
Formula: C₁₆H₂₅NO₃
MW: 279.37 g/mol

VQ-028659

Reference Standard

D,L-threo-Droxidopa-13C2,15N Hydrochloride chemical structure

D,L-threo-Droxidopa-13C2,15N Hydrochloride

CAS: 1329556-63-9
Formula: C₉H₁₂ClNO₅
MW: 252.63 g/mol

VQ-038774

Reference Standard

D,L-Venlafaxine-d10 Hydrochloride chemical structure

D,L-Venlafaxine-d10 Hydrochloride

CAS: 1216539-56-8
Formula: C₁₇H₂₈ClNO₂
MW: 324.9 g/mol

VQ-042852

Reference Standard

d35-Octadecanoic acid chemical structure

d35-Octadecanoic acid

CAS: 17660-51-4
Formula: C₁₈H₃₆O₂
MW: 319.7 g/mol

VQ-052402

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