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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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COA + SDSwith every lot

Reference Standard

Bortezomib Impurity 15 chemical structure

Bortezomib Impurity 15

CAS: 2363753-29-9
Formula: C₁₇H₂₉BF₃NO₄
MW: 379.2 g/mol

VQ-036001

Reference Standard

Bortezomib Impurity 20

Bortezomib Impurity 20

CAS: 89618-77-9
Formula: C₁₄H₂₄BClO₂
MW: 270.6 g/mol

VQ-043976

Reference Standard

Bortezomib Impurity 22

Bortezomib Impurity 22

CAS: 94242-81-6
Formula: C₁₄H₂₆BNO₂ : C₂HF₃O₂

VQ-043977

Reference Standard

Bortezomib Impurity 23 chemical structure

Bortezomib Impurity 23

CAS: 85167-14-2
Formula: C₁₅H₂₆BClO₂
MW: 284.6 g/mol

VQ-004537

Reference Standard

Bortezomib Impurity 5 chemical structure

Bortezomib Impurity 5

Formula: C₁₉H₂₅BN₄O₄
MW: 384.2 g/mol

VQ-004538

Reference Standard

Bortezomib Impurity 53

Bortezomib Impurity 53

CAS: 2364553-64-8
Formula: C₁₄H₁₃N₃O₃
MW: 271.3 g/mol

VQ-044528

Reference Standard

Bortezomib Impurity A chemical structure

Bortezomib Impurity A

CAS: 289472-80-6
Formula: C₁₄H₁₄N₄O₂
MW: 270.29 g/mol

VQ-020684

Reference Standard

Bortezomib Impurity F chemical structure

Bortezomib Impurity F

CAS: 73058-37-4
Formula: C₁₅H₁₅N₃O₃
MW: 285.3 g/mol

VQ-021862

Reference Standard

Bortezomib Impurity F (Freebase) chemical structure

Bortezomib Impurity F (Freebase)

CAS: 114457-94-2
Formula: C₁₄H₁₃N₃O₃
MW: 271.27 g/mol

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Reference Standard

Bortezomib Impurity F (Potassium Salt)

Bortezomib Impurity F (Potassium Salt)

CAS: 1093959-76-2
Formula: C₁₄H₁₃N₃O₃.K
MW: 310.37 g/mol

VQ-004540

Reference Standard

Bortezomib Impurity F (Sodium Salt) chemical structure

Bortezomib Impurity F (Sodium Salt)

CAS: 1093959-75-1
Formula: C₁₄H₁₃N₃O₃
MW: 271.27 g/mol

VQ-004541

Reference Standard

Bortezomib Impurity H chemical structure

Bortezomib Impurity H

CAS: 1446194-56-4
Formula: C₁₉H₂₄N₄O₂
MW: 340.4 g/mol

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Reference Standard

Bortezomib Isoamyl Impurity chemical structure

Bortezomib Isoamyl Impurity

CAS: 1375004-39-9
Formula: C₂₉H₃₉BN₄O₄
MW: 518.5 g/mol

VQ-036002

Reference Standard

Bortezomib Pinanediol Ester Impurity chemical structure

Bortezomib Pinanediol Ester Impurity

CAS: 205393-22-2
Formula: C₂₉H₃₉BN₄O₄
MW: 518.5 g/mol

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Reference Standard

Bortezomib Trimer chemical structure

Bortezomib Trimer

CAS: 390800-88-1
Formula: C₅₇H₆₉B₃N₁₂O₉
MW: 1098.7 g/mol

VQ-021864

Reference Standard

Bortezomib USP Related Compoud M chemical structure

Bortezomib USP Related Compoud M

CAS: 886979-81-3
Formula: C₁₉H₂₄N₄O₄
MW: 372.4 g/mol

VQ-004544

Reference Standard

Bosentan 4,6-dione impurity chemical structure

Bosentan 4,6-dione impurity

CAS: 150728-12-4
Formula: C₁₅H₁₂N₄O₄
MW: 312.28 g/mol

VQ-036004

Reference Standard

Bosentan Chloro Impurity

Bosentan Chloro Impurity

CAS: 1855932-53-4
Formula: C₂₇H₂₈ClN₅O₅S
MW: 570.06 g/mol

VQ-047605

Reference Standard

Bosentan Dimethoxy Impurity

Bosentan Dimethoxy Impurity

CAS: 157415-46-8
Formula: C₂₆H₂₇N₅O₅S
MW: 521.59 g/mol

VQ-045293

Reference Standard

Bosentan Impurity 1 chemical structure

Bosentan Impurity 1

CAS: 1177447-87-8
Formula: C₂₁H₂₃ClN₄O₄
MW: 430.9 g/mol

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Reference Standard

Bosentan Impurity 25

Bosentan Impurity 25

CAS: 2040390-30-3
Formula: C₈H₅ClN₄O₂
MW: 224.6 g/mol

VQ-036006

Reference Standard

Bosentan Impurity 26

Bosentan Impurity 26

CAS: 2040390-37-0
Formula: C₈H₃Cl₃N₄
MW: 261.5 g/mol

VQ-036007

Reference Standard

Bosentan Related Compound A cesium salt

Bosentan Related Compound A cesium salt

CAS: 1218951-79-1
Formula: C₂₅H₂₄ClCsN₅O₄S
MW: 658.91 g/mol

VQ-044626

Reference Standard

Bosentan Related Compound D chemical structure

Bosentan Related Compound D

CAS: 150728-13-5
Formula: C₁₅H₁₀Cl₂N₄O₂
MW: 349.2 g/mol

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