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Impurities & Reference Standards

API Impurities

Source 1942 api impurities for research, QC and production, documented with COA and SDS.

14,098products

1,516in stock

COA + SDSwith every lot

Reference Standard

Lansoprazole Thioxo Impurity chemical structure

Lansoprazole Thioxo Impurity

CAS: 1246819-06-6
Formula: C₁₄H₉N₃OS
MW: 267.31 g/mol

VQ-026357

Reference Standard

Lapatinib 2-Fluoro Impurity chemical structure

Lapatinib 2-Fluoro Impurity

CAS: 1393112-45-2
Formula: C₂₉H₂₆ClFN₄O₄S
MW: 581.1 g/mol

VQ-022927

Reference Standard

Lapatinib 4-Fluoro Impurity chemical structure

Lapatinib 4-Fluoro Impurity

CAS: 1026818-86-9
Formula: C₂₉H₂₆ClFN₄O₄S
MW: 581.1 g/mol

VQ-022928

Reference Standard

Lapatinib Ditosylate chemical structure

Lapatinib Ditosylate

CAS: 388082-77-7
Formula: C₄₃H₄₂ClFN₄O₁₀S₃
MW: 925.5 g/mol

VQ-031445

Reference Standard

Lapatinib Impurity 2 chemical structure

Lapatinib Impurity 2

CAS: 1807733-95-4
Formula: C₂₉H₂₅ClFN₄O₄S⁺
MW: 580 g/mol

VQ-048794

Reference Standard

Latanoprost Enol Impurity chemical structure

Latanoprost Enol Impurity

CAS: 41639-73-0
Formula: C₃₁H₃₀O₅
MW: 482.6 g/mol

VQ-037908

Reference Standard

Latanoprost Lactol chemical structure

Latanoprost Lactol

CAS: 352276-28-9
Formula: C₁₈H₂₆O₄
MW: 306.4 g/mol

VQ-026384

Reference Standard

Latanoprost Lactone Diol chemical structure

Latanoprost Lactone Diol

CAS: 145667-75-0
Formula: C₁₈H₂₄O₄
MW: 304.4 g/mol

VQ-043505

Reference Standard

Latanoprost Tris(triethylsilyl) Ether chemical structure

Latanoprost Tris(triethylsilyl) Ether

CAS: 477884-78-9
Formula: C₄₄H₈₂O₅Si₃
MW: 775.4 g/mol

VQ-022935

Reference Standard

Latanoprostene Bunod chemical structure

Latanoprostene Bunod

CAS: 860005-21-6
Formula: C₂₇H₄₁NO₈
MW: 507.6 g/mol

VQ-026383

Reference Standard

Lauroside D chemical structure

CAS: 820986-53-6
Formula: C₁₉H₃₄O₈
MW: 390.5 g/mol

VQ-030582

Reference Standard

Lauroyl Arginine Hydrochloride chemical structure

Lauroyl Arginine Hydrochloride

CAS: 181434-85-5
Formula: C₁₈H₃₇ClN₄O₃
MW: 393 g/mol

VQ-043456

Reference Standard

Lazertinib (Step A-Stage 1)

Lazertinib (Step A-Stage 1)

Formula: C₁₄H₉ClN₄O
MW: 284.7 g/mol

In stock

Reference Standard

Lazertinib (Step B-Stage 2) chemical structure

Lazertinib (Step B-Stage 2)

CAS: 1903010-18-3
Formula: C₁₁H₁₅N₃O₄
MW: 253.25 g/mol

In stock

Reference Standard

Lazertinib Impurity 5

Lazertinib Impurity 5

CAS: 2270944-72-2
Formula: C₃₀H₃₅ClN₈O₃
MW: 591.11 g/mol

VQ-048810

Reference Standard

Lazertinib Impurity 7

Lazertinib Impurity 7

Formula: C₂₅H₂₃N₇O₅
MW: 501.49 g/mol

VQ-005136

Reference Standard

Lazertinib Impurity 8

Lazertinib Impurity 8

Formula: C₃₀H₃₆N₈O₄
MW: 572.66 g/mol

VQ-005137

Reference Standard

Ledipasvir Acetyl Spiro Impurity

Ledipasvir Acetyl Spiro Impurity

CAS: 2040487-36-1
Formula: C₄₄H₄₅F₂N₇O₄
MW: 773.87 g/mol

VQ-031459

Reference Standard

Ledipasvir boronic acid Intermediate chemical structure

Ledipasvir boronic acid Intermediate

CAS: 1256387-87-7
Formula: C₂₄H₃₄BN₃O₄
MW: 439.4 g/mol

VQ-045259

Reference Standard

Ledipasvir Bromo Intermediate chemical structure

Ledipasvir Bromo Intermediate

CAS: 1441670-89-8
Formula: C₂₇H₂₆BrF₂N₃O₂
MW: 542.4 g/mol

VQ-045258

Reference Standard

Ledipasvir D tartrate chemical structure

Ledipasvir D tartrate

CAS: 1502654-87-6
Formula: C₅₃H₆₀F₂N₈O₁₂
MW: 1039.1 g/mol

VQ-037916

Reference Standard

Ledipasvir Impurity-3 chemical structure

Ledipasvir Impurity-3

CAS: 1256388-50-7
Formula: C₂₉H₂₉BrF₂N₄O₃
MW: 599.5 g/mol

VQ-037917

Reference Standard

Lemborexant (S,S Isomer) chemical structure

Lemborexant (S,S Isomer)

CAS: 3070371-43-3
Formula: C₂₂H₂₀F₂N₄O₂
MW: 410.4 g/mol

VQ-048815

Reference Standard

Lemborexant(R,R Isomer) chemical structure

Lemborexant(R,R Isomer)

CAS: 3070371-41-1
Formula: C₂₂H₂₀F₂N₄O₂
MW: 410.4 g/mol

VQ-048816

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