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Impurities & Reference Standards

API Impurities

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

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Reference Standard

Lofepramine Hydrochloride - Impurity A

Lofepramine Hydrochloride - Impurity A

CAS: 1268083-59-5
Formula: C₉H₁₁ClNO
MW: 184.64 g/mol

VQ-048915

Reference Standard

Lofexidine Acid Impurity chemical structure

Lofexidine Acid Impurity

CAS: 25140-90-3
Formula: C₉H₈Cl₂O₃
MW: 235.06 g/mol

VQ-038101

Reference Standard

Lofexidine Nitrile Impurity chemical structure

Lofexidine Nitrile Impurity

CAS: 78302-27-9
Formula: C₉H₇Cl₂NO
MW: 216.06 g/mol

VQ-048916

Reference Standard

Lonafarnib Impurity 1 chemical structure

Lonafarnib Impurity 1

CAS: 193276-77-6
Formula: C₂₆H₃₀Br₂ClN₃O
MW: 595.8 g/mol

VQ-048921

Reference Standard

Lonafarnib S-Enantiomer chemical structure

Lonafarnib S-Enantiomer

CAS: 193275-85-3
Formula: C₂₇H₃₁Br₂ClN₄O₂
MW: 638.8 g/mol

VQ-048924

Reference Standard

Loperamide Impurity C chemical structure

Loperamide Impurity C

CAS: 39512-49-7
Formula: C₁₁H₁₄ClNO
MW: 211.69 g/mol

In stock

Reference Standard

Loperamide Related Compound F chemical structure

Loperamide Related Compound F

CAS: 181112-35-6
Formula: C₁₁₆H₁₅₀Cl₄N₈O₂₁
MW: 2134.3 g/mol

VQ-031616

Reference Standard

Lopinavir Impurity S chemical structure

Lopinavir Impurity S

CAS: 943250-65-5
Formula: C₄₇H₅₈N₄O₇
MW: 791 g/mol

In stock

Reference Standard

Lopinavir Impurity T chemical structure

Lopinavir Impurity T

CAS: 1797024-56-6
Formula: C₅₇H₆₆N₄O₇
MW: 919.2 g/mol

In stock

Reference Standard

Loranitrile Stage-I-Impurity chemical structure

Loranitrile Stage-I-Impurity

CAS: 114444-10-9
Formula: C₁₄H₉ClN₂O
MW: 256.68 g/mol

In stock

Reference Standard

Loranitrile Stage-II-Impurity chemical structure

Loranitrile Stage-II-Impurity

CAS: 31251-55-5
Formula: C₁₃H₁₀ClNO
MW: 231.68 g/mol

In stock

Reference Standard

Loratadine 2-Chloro Impurity chemical structure

Loratadine 2-Chloro Impurity

CAS: 165739-64-0
Formula: C₂₂H₂₂Cl₂N₂O₂
MW: 417.3 g/mol

VQ-043638

Reference Standard

Loratadine 8-Bromo Impurity chemical structure

Loratadine 8-Bromo Impurity

CAS: 130642-60-3
Formula: C₂₂H₂₃BrN₂O₂
MW: 427.3 g/mol

In stock

Reference Standard

Loratadine Cyano Impurity chemical structure

Loratadine Cyano Impurity

CAS: 31255-57-9
Formula: C₁₄H₁₁ClN₂
MW: 242.7 g/mol

VQ-031631

Reference Standard

Loratadine Impurity 1

Loratadine Impurity 1

CAS: 31255-59-1
Formula: C₁₄H₁₁ClN₂
MW: 242.7 g/mol

VQ-048941

Reference Standard

Loratadine Impurity 2 chemical structure

Loratadine Impurity 2

CAS: 133330-72-0
Formula: C₁₄H₁₂ClNO
MW: 245.7 g/mol

VQ-038121

Reference Standard

Loratadine Impurity 9 chemical structure

Loratadine Impurity 9

CAS: 1449295-46-8
Formula: C₂₇H₂₅BrN₄O₅S
MW: 597.5 g/mol

VQ-048935

Reference Standard

Loratadine Impurity B chemical structure

Loratadine Impurity B

CAS: 38093-12-8
Formula: C₁₄H₁₂ClN
MW: 229.7 g/mol

VQ-048938

Reference Standard

Loratadine Impurity E chemical structure

Loratadine Impurity E

CAS: 133330-60-6
Formula: C₁₄H₉Cl₂NO
MW: 278.1 g/mol

VQ-031629

Reference Standard

Lorcaserin Dechloro Impurity chemical structure

Lorcaserin Dechloro Impurity

CAS: 929297-55-2
Formula: C₁₁H₁₅N
MW: 161.24 g/mol

VQ-038134

Reference Standard

Lorcaserin Dimer Impurity

Lorcaserin Dimer Impurity

CAS: 1807773-81-4
Formula: C₁₉H₂₁Cl₂N
MW: 334.28 g/mol

In stock

Reference Standard

Lorcaserin Impurity A Hydrochloride chemical structure

Lorcaserin Impurity A Hydrochloride

CAS: 1006037-59-7
Formula: C₁₁H₁₅Cl₂N
MW: 232.15 g/mol

VQ-043213

Reference Standard

Lorcaserin Lactam Impurity chemical structure

Lorcaserin Lactam Impurity

CAS: 824430-77-5
Formula: C₁₁H₁₂ClNO
MW: 209.67 g/mol

VQ-043214

Reference Standard

Lorcaserin Sulfamate chemical structure

Lorcaserin Sulfamate

CAS: 1361572-46-4
Formula: C₁₁H₁₄ClNO₃S
MW: 275.75 g/mol

VQ-031638

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