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Impurities & Reference Standards

Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.

28,554products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,252 Pharmacopeial Impurities (EP / USP / BP) 4,401 Nitrosamine Impurities 650 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612 Metabolites & Degradation Products 4,146 API Reference Standards 3,493

Reference Standard

Carbamimidothioic Acid 9-Hydroxynonyl Ester Bromide chemical structure

Carbamimidothioic Acid 9-Hydroxynonyl Ester Bromide

CAS: 511545-93-0
Formula: C₁₀H₂₃BrN₂OS
MW: 299.27 g/mol

VQ-030896

Reference Standard

Carbamoyl Kanamycin B chemical structure

Carbamoyl Kanamycin B

CAS: 51736-76-6
Formula: C₁₉H₃₈N₆O₁₁
MW: 526.5 g/mol

VQ-043535

Reference Standard

Carbamoyl-D-phenylalanine chemical structure

Carbamoyl-D-phenylalanine

CAS: 54896-72-9
Formula: C₁₀H₁₂N₂O₃
MW: 208.21 g/mol

VQ-042231

Reference Standard

Carbamoyloxyurea chemical structure

Carbamoyloxyurea

CAS: 4543-62-8
Formula: C₂H₅N₃O₃
MW: 119.08 g/mol

VQ-023414

Reference Standard

Carbaryl chemical structure

CAS: 63-25-2
Formula: C₁₂H₁₁NO₂
MW: 201.22 g/mol

VQ-029631

Reference Standard

Carbazeran chemical structure

CAS: 70724-25-3
Formula: C₁₈H₂₄N₄O₄
MW: 360.4 g/mol

VQ-047684

Reference Standard

Carbazochrome chemical structure

CAS: 69-81-8
Formula: C₁₀H₁₂N₄O₃
MW: 236.23 g/mol

VQ-024764

Reference Standard

Carbazochrome Sodium Sulfonate chemical structure

Carbazochrome Sodium Sulfonate

CAS: 51460-26-5
Formula: C₁₀H₁₁N₄NaO₅S
MW: 322.28 g/mol

VQ-024765

Reference Standard

Carbazole D8 chemical structure

CAS: 38537-24-5
Formula: C₁₂H₉N
MW: 175.25 g/mol

VQ-041232

Reference Standard

Carbenoxolone chemical structure

CAS: 5697-56-3
Formula: C₃₄H₅₀O₇
MW: 570.8 g/mol

VQ-040616

Reference Standard

Carbetocin chemical structure

CAS: 37025-55-1
Formula: C₄₅H₆₉N₁₁O₁₂S
MW: 988.2 g/mol

VQ-024766

Reference Standard

Carbetocin Sulfoxide I

Carbetocin Sulfoxide I

CAS: 221464-32-0
Formula: C₄₅H₆₉N₁₁O₁₃S
MW: 1004.16 g/mol

VQ-029633

Reference Standard

Carbetocin sulfoxide II

Carbetocin sulfoxide II

CAS: 221464-33-1
Formula: C₄₅H₆₉N₁₁O₁₃S
MW: 1004.16 g/mol

VQ-029632

Reference Standard

Carbidopa EP Impurity A chemical structure

Carbidopa EP Impurity A

CAS: 555-30-6
Formula: C₁₀H₁₃NO₄
MW: 211.21 g/mol

VQ-022004

Reference Standard

Carbidopa EP Impurity B chemical structure

Carbidopa EP Impurity B

CAS: 18181-08-3
Formula: C₁₁H₁₅NO₄
MW: 225.24 g/mol

VQ-022002

Reference Standard

Carbidopa EP Impurity C chemical structure

Carbidopa EP Impurity C

CAS: 84488-77-7
Formula: C₁₁H₁₆N₂O₄
MW: 240.26 g/mol

VQ-029635

Reference Standard

Carbidopa EP Impurity D chemical structure

Carbidopa EP Impurity D

CAS: 934371-48-9
Formula: C₁₇H₂₄N₂O₄
MW: 320.4 g/mol

VQ-022000

Reference Standard

Carbidopa EP Impurity E chemical structure

Carbidopa EP Impurity E

CAS: 52514-63-3
Formula: C₁₁H₁₆N₂O₄
MW: 240.26 g/mol

VQ-024768

Reference Standard

Carbidopa EP Impurity F chemical structure

Carbidopa EP Impurity F

CAS: 1458640-32-8
Formula: C₁₂H₁₈N₂O₄
MW: 254.28 g/mol

VQ-036145

Reference Standard

Carbidopa EP Impurity G chemical structure

Carbidopa EP Impurity G

CAS: 2503-44-8
Formula: C₉H₁₀O₃
MW: 166.17 g/mol

VQ-024772

Reference Standard

Carbidopa EP Impurity H chemical structure

Carbidopa EP Impurity H

CAS: 1361017-74-4
Formula: C₁₁H₁₆N₂O₄
MW: 240.26 g/mol

VQ-029636

Reference Standard

Carbidopa EP Impurity I (Racemic) chemical structure

Carbidopa EP Impurity I (Racemic)

CAS: 1246819-09-9
Formula: C₁₀H₁₃BrN₂O₄
MW: 305.12 g/mol

VQ-024771

Reference Standard

Carbidopa EP Impurity J chemical structure

Carbidopa EP Impurity J

CAS: 43197-33-7
Formula: C₁₀H₁₃BrN₂O₄
MW: 305.12 g/mol

VQ-024769

Reference Standard

Carbidopa Hydantoic Acid chemical structure

Carbidopa Hydantoic Acid

CAS: 28861-00-9
Formula: C₁₃H₁₈N₂O₅
MW: 282.29 g/mol

VQ-029638

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