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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

L-Isoleucine Methyl Ester Hydrochloride chemical structure

L-Isoleucine Methyl Ester Hydrochloride

CAS: 18598-74-8
Formula: C₇H₁₆ClNO₂
MW: 181.66 g/mol

VQ-038090

Reference Standard

L-Lactic Acid-d3 Sodium Salt chemical structure

L-Lactic Acid-d3 Sodium Salt

CAS: 285979-84-2
Formula: C₃H₅NaO₃
MW: 115.08 g/mol

VQ-052404

Reference Standard

L-Leucine D7 chemical structure

CAS: 92751-17-2
Formula: C₆H₁₃NO₂
MW: 138.22 g/mol

VQ-048765

Reference Standard

L-Leucine-d10 chemical structure

CAS: 106972-44-5
Formula: C₆H₁₃NO₂
MW: 141.23 g/mol

VQ-041230

Reference Standard

L-Leucine-d3 chemical structure

CAS: 87828-86-2
Formula: C₆H₁₃NO₂
MW: 134.19 g/mol

VQ-037840

Reference Standard

L-Lysine Acetate chemical structure

L-Lysine Acetate

CAS: 57282-49-2
Formula: C₈H₁₈N₂O₄
MW: 206.24 g/mol

VQ-031702

Reference Standard

L-Lysine S-(Carboxymethyl)-L-Cysteine chemical structure

L-Lysine S-(Carboxymethyl)-L-Cysteine

CAS: 49673-81-6
Formula: C₁₁H₂₃N₃O₆S
MW: 325.38 g/mol

VQ-044239

Reference Standard

L-Lysine-15N Dihydrochloride Salt chemical structure

L-Lysine-15N Dihydrochloride Salt

CAS: 204451-50-3
Formula: C₆H₁₆Cl₂N₂O₂
MW: 220.1 g/mol

VQ-048997

Reference Standard

L-Lysine-4,4,5,5-d4 Hydrochloride chemical structure

L-Lysine-4,4,5,5-d4 Hydrochloride

CAS: 284664-96-6
Formula: C₆H₁₅ClN₂O₂
MW: 186.67 g/mol

VQ-038232

Reference Standard

L-Lysine-K-DEA (n-1) Impurity

L-Lysine-K-DEA (n-1) Impurity

Formula: C₂₆H₃₅N₃O₅
MW: 469.57 g/mol

In stock

Reference Standard

L-Lysine-K-DEA (n-2) Impurity chemical structure

L-Lysine-K-DEA (n-2) Impurity

CAS: 405-39-0
Formula: C₂₂H₂₆N₂O₆
MW: 414.5 g/mol

In stock

Reference Standard

L-Menthyl 2,2-Dihydroxyacetate chemical structure

L-Menthyl 2,2-Dihydroxyacetate

CAS: 111969-64-3
Formula: C₁₂H₂₂O₄
MW: 230.3 g/mol

VQ-027231

Reference Standard

L-Menthyl Acetate chemical structure

L-Menthyl Acetate

CAS: 2623-23-6
Formula: C₁₂H₂₂O₂
MW: 198.3 g/mol

VQ-039052

Reference Standard

L-Methionine-d3 chemical structure

L-Methionine-d3

CAS: 13010-53-2
Formula: C₅H₁₁NO₂S
MW: 152.23 g/mol

VQ-049068

Reference Standard

L-Milnacipran Hydrochloride chemical structure

L-Milnacipran Hydrochloride

CAS: 175131-61-0
Formula: C₁₅H₂₃ClN₂O
MW: 282.81 g/mol

VQ-044786

Reference Standard

L-Nal-Lanreotide

L-Nal-Lanreotide

CAS: 205234-49-7
Formula: C₅₄H₆₉N₁₁O₁₀S₂
MW: 1096.3 g/mol

VQ-031433

Reference Standard

L-Norepinephrine Bitartrate Monohydrate chemical structure

L-Norepinephrine Bitartrate Monohydrate

CAS: 108341-18-0
Formula: C₁₂H₁₉NO₁₀
MW: 337.28 g/mol

VQ-026942

Reference Standard

L-Norepinephrine Hydrochloride chemical structure

L-Norepinephrine Hydrochloride

CAS: 329-56-6
Formula: C₈H₁₂ClNO₃
MW: 205.64 g/mol

VQ-035022

Reference Standard

L-Norleucine chemical structure

CAS: 327-57-1
Formula: C₆H₁₃NO₂
MW: 131.17 g/mol

VQ-038900

Reference Standard

L-Norvaline chemical structure

CAS: 6600-40-4
Formula: C₅H₁₁NO₂
MW: 117.15 g/mol

VQ-041413

Reference Standard

L-Ornithine chemical structure

CAS: 70-26-8
Formula: C₅H₁₂N₂O₂
MW: 132.16 g/mol

VQ-027044

Reference Standard

L-Ornithine Dihydrochloride

L-Ornithine Dihydrochloride

CAS: 897931-98-5
Formula: C₆H₁₄N₂O_2.2HCl
MW: 219.11 g/mol

VQ-048943

Reference Standard

L-Ornithine Dimer chemical structure

L-Ornithine Dimer

CAS: 195868-13-4
Formula: C₁₀H₂₂N₄O₃
MW: 246.31 g/mol

VQ-034997

Reference Standard

L-Ornithyl-L-aspartic Acid chemical structure

L-Ornithyl-L-aspartic Acid

CAS: 7327-72-2
Formula: C₉H₁₇N₃O₅
MW: 247.25 g/mol

VQ-031397

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