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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.

27,990products

6sub-categories

2,746in stock

COA + SDSwith every lot

API Impurities 14,098 Pharmacopeial Impurities (EP / USP / BP) 4,399 Nitrosamine Impurities 631 Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,504 Metabolites & Degradation Products 3,922 API Reference Standards 3,436

Reference Standard

Sulfacetamide Sodium EP Impurity C chemical structure

Sulfacetamide Sodium EP Impurity C

CAS: 5626-90-4
Formula: C₁₀H₁₂N₂O₄S
MW: 256.28 g/mol

VQ-033970

Reference Standard

Sulfacetamide Sodium Monohydrate chemical structure

Sulfacetamide Sodium Monohydrate

CAS: 6209-17-2
Formula: C₈H₁₁N₂NaO₄S
MW: 254.24 g/mol

VQ-019525

Reference Standard

Sulfacetamide Sodium Salt chemical structure

Sulfacetamide Sodium Salt

CAS: 127-56-0
Formula: C₈H₉N₂NaO₃S
MW: 236.23 g/mol

VQ-042291

Reference Standard

Sulfachloropyrazine Sodium chemical structure

Sulfachloropyrazine Sodium

CAS: 71720-40-6
Formula: C₁₀H₈ClN₄NaO₂S
MW: 306.7 g/mol

VQ-040535

Reference Standard

Sulfachloropyrazine sodium monohydrate chemical structure

Sulfachloropyrazine sodium monohydrate

CAS: 1392129-96-2
Formula: C₁₀H₁₀ClN₄NaO₃S
MW: 324.72 g/mol

VQ-039825

Reference Standard

Sulfachloropyridazine chemical structure

Sulfachloropyridazine

CAS: 80-32-0
Formula: C₁₀H₉ClN₄O₂S
MW: 284.72 g/mol

VQ-032379

Reference Standard

Sulfachlorpyridazine Sodium chemical structure

Sulfachlorpyridazine Sodium

CAS: 23282-55-5
Formula: C₁₀H₈ClN₄NaO₂S
MW: 306.7 g/mol

VQ-042292

Reference Standard

Sulfadiazine EP Impurity E chemical structure

Sulfadiazine EP Impurity E

CAS: 127-74-2
Formula: C₁₂H₁₂N₄O₃S
MW: 292.32 g/mol

VQ-028138

Reference Standard

Sulfadiazine-d4 chemical structure

Sulfadiazine-d4

CAS: 1020719-78-1
Formula: C₁₀H₁₀N₄O₂S
MW: 254.3 g/mol

VQ-033971

Reference Standard

Sulfadimethoxine chemical structure

Sulfadimethoxine

CAS: 122-11-2
Formula: C₁₂H₁₄N₄O₄S
MW: 310.33 g/mol

VQ-028139

Reference Standard

Sulfadimethoxine EP Impurity A chemical structure

Sulfadimethoxine EP Impurity A

CAS: 3289-50-7
Formula: C₆H₉N₃O₂
MW: 155.15 g/mol

VQ-035246

Reference Standard

Sulfadimethoxine EP Impurity B chemical structure

Sulfadimethoxine EP Impurity B

CAS: 555-25-9
Formula: C₁₄H₁₆N₄O₅S
MW: 352.37 g/mol

VQ-035230

Reference Standard

Sulfadimethoxine EP Impurity C chemical structure

Sulfadimethoxine EP Impurity C

CAS: 121-62-0
Formula: C₈H₉NO₄S
MW: 215.23 g/mol

VQ-033972

Reference Standard

Sulfadimethoxine EP Impurity F chemical structure

Sulfadimethoxine EP Impurity F

CAS: 19868-00-9
Formula: C₁₁H₁₂N₄O₄S
MW: 296.3 g/mol

VQ-033973

Reference Standard

Sulfadimethoxine Sodium chemical structure

Sulfadimethoxine Sodium

CAS: 1037-50-9
Formula: C₁₂H₁₃N₄NaO₄S
MW: 332.31 g/mol

VQ-042294

Reference Standard

Sulfadimethoxine-d4 chemical structure

Sulfadimethoxine-d4

CAS: 1020719-80-5
Formula: C₁₂H₁₄N₄O₄S
MW: 314.36 g/mol

VQ-042297

Reference Standard

Sulfadimethoxine-d6 chemical structure

Sulfadimethoxine-d6

CAS: 73068-02-7
Formula: C₁₂H₁₄N₄O₄S
MW: 316.37 g/mol

VQ-042296

Reference Standard

Sulfadimidine Sodium chemical structure

Sulfadimidine Sodium

CAS: 1981-58-4
Formula: C₁₂H₁₃N₄NaO₂S
MW: 300.31 g/mol

VQ-042302

Reference Standard

Sulfadoxine-d3 chemical structure

CAS: 1262770-70-6
Formula: C₁₂H₁₄N₄O₄S
MW: 313.35 g/mol

VQ-042298

Reference Standard

Sulfadoxine-d4 chemical structure

CAS: 1330266-05-1
Formula: C₁₂H₁₄N₄O₄S
MW: 314.36 g/mol

VQ-042299

Reference Standard

Sulfaethoxypyridazine chemical structure

Sulfaethoxypyridazine

CAS: 963-14-4
Formula: C₁₂H₁₄N₄O₃S
MW: 294.33 g/mol

VQ-042300

Reference Standard

Sulfaguanidine monohydrate chemical structure

Sulfaguanidine monohydrate

CAS: 6190-55-2
Formula: C₇H₁₂N₄O₃S
MW: 232.26 g/mol

VQ-042301

Reference Standard

Sulfameter chemical structure

CAS: 651-06-9
Formula: C₁₁H₁₂N₄O₃S
MW: 280.31 g/mol

VQ-039876

Reference Standard

Sulfamethazine-d4 chemical structure

Sulfamethazine-d4

CAS: 1020719-82-7
Formula: C₁₂H₁₄N₄O₂S
MW: 282.36 g/mol

VQ-042303

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