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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

Siponimod Impurity-9 chemical structure

Siponimod Impurity-9

CAS: 1418144-63-4
Formula: C₁₁H₁₂O₂
MW: 176.21 g/mol

In stock

Reference Standard

Siponimod Impurity-A (N-1)

Siponimod Impurity-A (N-1)

Formula: C₃₀H₃₅F₃N₂O₃
MW: 528.61 g/mol

In stock

Reference Standard

Siponimod Impurity-A(Stage-III) chemical structure

Siponimod Impurity-A(Stage-III)

CAS: 2474774-16-6
Formula: C₁₆H₂₁NO₃
MW: 275.34 g/mol

VQ-005909

Reference Standard

Siponimod Impurity-K

Siponimod Impurity-K

Formula: C₅₈H₇₀F₆N₄O₆
MW: 1033.19 g/mol

In stock

Reference Standard

Siponimod Impurity-K(n-2)

Siponimod Impurity-K(n-2)

Formula: C₃₄H₄₅F₃N₂O₆
MW: 634.73 g/mol

VQ-005911

Reference Standard

Siponimod Methyl Ester Impurity

Siponimod Methyl Ester Impurity

CAS: 2746387-08-4
Formula: C₃₀H₃₇F₃N₂O₃
MW: 530.62 g/mol

VQ-005912

Reference Standard

Siponimod Olefin Impurity

Siponimod Olefin Impurity

Formula: C₁₄H₁₄BrF₃
MW: 319.16 g/mol

In stock

Reference Standard

Siponimod Propanoic Acid Impurity

Siponimod Propanoic Acid Impurity

Formula: C₂₉H₃₇F₃N₂O₄
MW: 534.61 g/mol

In stock

Reference Standard

Siponimod Trimethyl Sillyl EZ-Isomer Mixture Impurity

Siponimod Trimethyl Sillyl EZ-Isomer Mixture Impurity

Formula: C₂₈H₃₄F₃NO₂Si
MW: 501.66 g/mol

VQ-005915

Reference Standard

Siponimod Trimethyl Sillyl Impurity

Siponimod Trimethyl Sillyl Impurity

Formula: C₂₈H₃₄F₃NO₂Si
MW: 501.66 g/mol

In stock

Reference Standard

Siponimod Z Isomer chemical structure

Siponimod Z Isomer

CAS: 2768181-14-0
Formula: C₂₉H₃₅F₃N₂O₃
MW: 516.6 g/mol

VQ-023759

Reference Standard

Siponimod-Open ring (Impurity-C)

Siponimod-Open ring (Impurity-C)

Formula: C₂₉H₃₅F₃N₂O₃.C₂H₇NO₂
MW: 593.68 g/mol

VQ-005917

Reference Standard

Sirolimus Isomer B chemical structure

Sirolimus Isomer B

CAS: 157182-37-1
Formula: C₅₁H₇₉NO₁₃
MW: 914.2 g/mol

VQ-044555

Reference Standard

Sirolimus Isomer C chemical structure

Sirolimus Isomer C

CAS: 150821-39-9
Formula: C₅₁H₇₉NO₁₃
MW: 914.2 g/mol

VQ-033868

Reference Standard

Sisomicin chemical structure

CAS: 32385-11-8
Formula: C₁₉H₃₇N₅O₇
MW: 447.5 g/mol

VQ-023760

Reference Standard

Sitagliptin 2-Desfluoro Impurity chemical structure

Sitagliptin 2-Desfluoro Impurity

CAS: 486459-88-5
Formula: C₁₆H₁₆F₅N₅O
MW: 389.32 g/mol

VQ-023764

Reference Standard

Sitagliptin Amide Impurity chemical structure

Sitagliptin Amide Impurity

CAS: 2137101-64-3
Formula: C₁₀H₁₁F₃N₂O
MW: 232.2 g/mol

In stock

Reference Standard

Sitagliptin Amide Impurity (stage-1)

Sitagliptin Amide Impurity (stage-1)

Formula: C₁₅H₁₉F₃N₂O₃
MW: 332.32 g/mol

In stock

Reference Standard

Sitagliptin Amino Butenoate Impurity chemical structure

Sitagliptin Amino Butenoate Impurity

CAS: 881995-70-6
Formula: C₁₁H₁₀F₃NO₂
MW: 245.2 g/mol

VQ-028063

Reference Standard

Sitagliptin Dioxo Impurity chemical structure

Sitagliptin Dioxo Impurity

CAS: 764667-64-3
Formula: C₁₄H₁₁F₃O₅
MW: 316.23 g/mol

In stock

Reference Standard

Sitagliptin Enamine Impurity chemical structure

Sitagliptin Enamine Impurity

CAS: 767340-03-4
Formula: C₁₆H₁₃F₆N₅O
MW: 405.3 g/mol

In stock

Reference Standard

Sitagliptin ethyl ester impurity chemical structure

Sitagliptin ethyl ester impurity

CAS: 1151240-91-3
Formula: C₁₂H₁₄F₃NO₂
MW: 261.24 g/mol

VQ-028062

Reference Standard

Sitagliptin FP Impurity A chemical structure

Sitagliptin FP Impurity A

CAS: 2088771-60-0
Formula: C₂₀H₁₉F₆N₅O₅
MW: 523.4 g/mol

In stock

Reference Standard

Sitagliptin FP Impurity B chemical structure

Sitagliptin FP Impurity B

CAS: 2805078-75-3
Formula: C₁₆H₁₃F₆N₅O₂
MW: 421.3 g/mol

VQ-005923

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