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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

Bleomycin A5 Hydrochloride chemical structure

Bleomycin A5 Hydrochloride

CAS: 55658-47-4
Formula: C₅₇H₉₀ClN₁₉O₂₁S₂
MW: 1477 g/mol

VQ-029461

Reference Standard

Bleomycin Acid chemical structure

CAS: 37364-66-2
Formula: C₅₀H₇₂N₁₆O₂₂S₂
MW: 1313.3 g/mol

VQ-029464

Reference Standard

Bleomycin B2 chemical structure

CAS: 9060-10-0
Formula: C₅₅H₈₄N₂₀O₂₁S₂
MW: 1425.5 g/mol

VQ-035994

Reference Standard

Bleomycin B4 chemical structure

CAS: 9060-11-1
Formula: C₆₀H₉₅N₂₃O₂₁S₂
MW: 1538.7 g/mol

VQ-029463

Reference Standard

Blonanserin C chemical structure

CAS: 132811-84-8
Formula: C₂₁H₂₆FN₃
MW: 339.4 g/mol

VQ-024613

Reference Standard

Blonanserin Impurity 3 chemical structure

Blonanserin Impurity 3

CAS: 2518376-10-6
Formula: C₁₇H₁₉FN₂
MW: 270.34 g/mol

VQ-035998

Reference Standard

Boc-(R)-3-Amino-4-phenylbutyric acid chemical structure

Boc-(R)-3-Amino-4-phenylbutyric acid

CAS: 101555-61-7
Formula: C₁₅H₂₁NO₄
MW: 279.33 g/mol

VQ-032498

Reference Standard

Boc-3,5-dihydroxy-1-adamantyl-L-glycine chemical structure

Boc-3,5-dihydroxy-1-adamantyl-L-glycine

CAS: 681282-72-4
Formula: C₁₇H₂₇NO₆
MW: 341.4 g/mol

VQ-027991

Reference Standard

Boc-D-4,4-Biphenylalanine chemical structure

Boc-D-4,4-Biphenylalanine

CAS: 128779-47-5
Formula: C₂₀H₂₃NO₄
MW: 341.4 g/mol

VQ-042063

Reference Standard

Boc-D-serine Benzylamide chemical structure

Boc-D-serine Benzylamide

CAS: 1253790-58-7
Formula: C₁₅H₂₂N₂O₄
MW: 294.35 g/mol

VQ-031407

Reference Standard

Boc-Elacestrant chemical structure

Boc-Elacestrant

CAS: 3046121-56-3
Formula: C₃₅H₄₆N₂O₄
MW: 558.7 g/mol

VQ-036922

Reference Standard

Boc-Lys(Boc)-ONp chemical structure

Boc-Lys(Boc)-ONp

CAS: 2592-19-0
Formula: C₂₂H₃₃N₃O₈
MW: 467.5 g/mol

VQ-031704

Reference Standard

Boc-Saxagliptin chemical structure

Boc-Saxagliptin

CAS: 709031-43-6
Formula: C₂₃H₃₃N₃O₄
MW: 415.5 g/mol

VQ-021340

Reference Standard

Boc-trans-4-aminocyclohexane acetic acid chemical structure

Boc-trans-4-aminocyclohexane acetic acid

CAS: 189153-10-4
Formula: C₁₃H₂₃NO₄
MW: 257.33 g/mol

VQ-029655

Reference Standard

Boc-valbenazine chemical structure

Boc-valbenazine

CAS: 2102090-16-2
Formula: C₂₉H₄₆N₂O₆
MW: 518.7 g/mol

VQ-044978

Reference Standard

Boeravinone B chemical structure

CAS: 114567-34-9
Formula: C₁₇H₁₂O₆
MW: 312.27 g/mol

VQ-039790

Reference Standard

Boldenone Undecylenate chemical structure

Boldenone Undecylenate

CAS: 13103-34-9
Formula: C₃₀H₄₄O₃
MW: 452.7 g/mol

VQ-043075

Reference Standard

Bortezomib Amide analog (Mixture of isomers)

Bortezomib Amide analog (Mixture of isomers)

CAS: 2748159-75-1
Formula: C₁₄H₁₄N₄O₂
MW: 270.29 g/mol

VQ-029474

Reference Standard

Bortezomib Amino R Isomer (Freebase) chemical structure

Bortezomib Amino R Isomer (Freebase)

CAS: 179324-86-8
Formula: C₁₅H₂₈BNO₂
MW: 265.2 g/mol

VQ-004532

Reference Standard

Bortezomib Amino R Isomer (TFA salt) chemical structure

Bortezomib Amino R Isomer (TFA salt)

CAS: 179324-87-9
Formula: C₁₇H₂₉BF₃NO₄
MW: 379.2 g/mol

In stock

Reference Standard

Bortezomib D-mannitol chemical structure

Bortezomib D-mannitol

CAS: 444576-08-3
Formula: C₂₅H₃₅BN₄O₈
MW: 530.4 g/mol

VQ-029475

Reference Standard

Bortezomib Diastereomer (R,R-Isomer) chemical structure

Bortezomib Diastereomer (R,R-Isomer)

CAS: 1132709-15-9
Formula: C₁₉H₂₅BN₄O₄
MW: 384.2 g/mol

VQ-004534

Reference Standard

Bortezomib Diastereomer (S,S - Isomer) chemical structure

Bortezomib Diastereomer (S,S - Isomer)

CAS: 1132709-14-8
Formula: C₁₉H₂₅BN₄O₄
MW: 384.2 g/mol

In stock

Reference Standard

Bortezomib Diastereomer Mixture (R,R and S,S) chemical structure

Bortezomib Diastereomer Mixture (R,R and S,S)

CAS: 1132709-14-8
Formula: C₁₉H₂₅BN₄O₄
MW: 384.2 g/mol

VQ-004536

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