Skip to content

Impurities & Reference Standards

API Impurities

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

14,252products

1,516in stock

COA + SDSwith every lot

Reference Standard

Clevidipine Dibutyryl Impurity

Clevidipine Dibutyryl Impurity

CAS: 253597-19-2
Formula: C₂₅H₂₉Cl₂NO₈
MW: 542.41 g/mol

VQ-021190

Reference Standard

Clevidipine Isopropyl Ester chemical structure

Clevidipine Isopropyl Ester

CAS: 2177293-82-0
Formula: C₂₃H₂₇Cl₂NO₆
MW: 484.4 g/mol

VQ-047822

Reference Standard

Clindamycin 2-Palmitate chemical structure

Clindamycin 2-Palmitate

CAS: 36688-78-5
Formula: C₃₄H₆₃ClN₂O₆S
MW: 663.4 g/mol

VQ-029851

Reference Standard

Clindamycin 3-Palmitate chemical structure

Clindamycin 3-Palmitate

CAS: 68225-59-2
Formula: C₃₄H₆₃ClN₂O₆S
MW: 663.4 g/mol

VQ-025023

Reference Standard

Clindamycin B Palmitate chemical structure

Clindamycin B Palmitate

CAS: 68206-99-5
Formula: C₃₃H₆₁ClN₂O₆S
MW: 649.4 g/mol

VQ-025020

Reference Standard

Clindamycin Diastereomer 2-Phosphate chemical structure

Clindamycin Diastereomer 2-Phosphate

CAS: 1800297-62-4
Formula: C₁₈H₃₄ClN₂O₈PS
MW: 505 g/mol

VQ-029849

Reference Standard

Clindamycin Heptadecanoate chemical structure

Clindamycin Heptadecanoate

CAS: 1123211-69-7
Formula: C₃₅H₆₅ClN₂O₆S
MW: 677.4 g/mol

VQ-025019

Reference Standard

Clindamycin Impurity (Dehydro) (Cis Isomer) chemical structure

Clindamycin Impurity (Dehydro) (Cis Isomer)

CAS: 198080-64-7
Formula: C₁₈H₃₂N₂O₅S
MW: 388.5 g/mol

VQ-043573

Reference Standard

Clindamycin Impurity (Hydrolysis product B) chemical structure

Clindamycin Impurity (Hydrolysis product B)

CAS: 22965-79-3
Formula: C₉H₁₈ClNO₄S
MW: 271.76 g/mol

VQ-036378

Reference Standard

Clindamycin Impurity 13

Clindamycin Impurity 13

CAS: 648910-17-2
Formula: C₂₁H₃₆Cl₃N₂O₆PS
MW: 581.9 g/mol

VQ-036379

Reference Standard

Clindamycin Impurity 9 chemical structure

Clindamycin Impurity 9

CAS: 906126-31-6
Formula: C₃₇H₆₇ClN₂O₆S
MW: 703.5 g/mol

VQ-044355

Reference Standard

Clindamycin Laurate chemical structure

Clindamycin Laurate

CAS: 763863-68-9
Formula: C₃₀H₅₅ClN₂O₇S
MW: 623.3 g/mol

VQ-029853

Reference Standard

Clindamycin Myristate chemical structure

Clindamycin Myristate

CAS: 1123211-66-4
Formula: C₃₂H₅₉ClN₂O₆S
MW: 635.3 g/mol

VQ-025017

Reference Standard

Clindamycin Pentadecanoate chemical structure

Clindamycin Pentadecanoate

CAS: 1123211-67-5
Formula: C₃₃H₆₁ClN₂O₆S
MW: 649.4 g/mol

VQ-025018

Reference Standard

Clindamycin Stearate chemical structure

Clindamycin Stearate

CAS: 1123211-70-0
Formula: C₃₆H₆₇ClN₂O₆S
MW: 691.4 g/mol

VQ-025024

Reference Standard

Clindamycin Sulfone chemical structure

Clindamycin Sulfone

CAS: 887402-22-4
Formula: C₁₈H₃₃ClN₂O₇S
MW: 457 g/mol

VQ-022219

Reference Standard

Clobazam Impurity A chemical structure

Clobazam Impurity A

CAS: 22316-55-8
Formula: C₁₅H₁₁ClN₂O₂
MW: 286.71 g/mol

In stock

Reference Standard

Clobazam Impurity E chemical structure

Clobazam Impurity E

CAS: 75524-13-9
Formula: C₁₅H₁₅ClN₂O
MW: 274.74 g/mol

In stock

Reference Standard

Clobazam Impurity H chemical structure

Clobazam Impurity H

CAS: 37385-92-5
Formula: C₁₄H₁₁ClN₂O
MW: 258.7 g/mol

VQ-036381

Reference Standard

Clobetasol 1.24 RRT Impurity

Clobetasol 1.24 RRT Impurity

Formula: C₂₄H₃₁FO₄
MW: 402.5 g/mol

In stock

Reference Standard

Clobetasone Butyrate chemical structure

Clobetasone Butyrate

CAS: 25122-57-0
Formula: C₂₆H₃₂ClFO₅
MW: 479 g/mol

VQ-022226

Reference Standard

Clocortolone Caproate chemical structure

Clocortolone Caproate

CAS: 4891-71-8
Formula: C₂₈H₃₈ClFO₅
MW: 509 g/mol

VQ-030798

Reference Standard

Clodronic Acid Monoisopropyl Ester chemical structure

Clodronic Acid Monoisopropyl Ester

CAS: 134757-52-1
Formula: C₄H₁₀Cl₂O₆P₂
MW: 286.97 g/mol

VQ-024751

Reference Standard

Clofarabine Des-Chloro Purinone Impurity chemical structure

Clofarabine Des-Chloro Purinone Impurity

CAS: 899827-82-8
Formula: C₁₀H₁₂FN₅O₄
MW: 285.23 g/mol

VQ-045407

Need a price, a spec or a custom compound?

Send us your list — product names or CAS numbers, grade, quantity and destination. Our team replies with a formal quotation, COA and lead time.

Request a quote Contact sales