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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

Tolbutamide EP Impurity C chemical structure

Tolbutamide EP Impurity C

CAS: 1156-19-0
Formula: C₁₄H₂₁N₃O₃S
MW: 311.4 g/mol

VQ-034317

Reference Standard

Tolcapone chemical structure

CAS: 134308-13-7
Formula: C₁₄H₁₁NO₅
MW: 273.24 g/mol

VQ-028431

Reference Standard

Tolcapone 3-Beta-D-Glucuronide chemical structure

Tolcapone 3-Beta-D-Glucuronide

CAS: 204853-33-8
Formula: C₂₀H₁₉NO₁₁
MW: 449.4 g/mol

VQ-045252

Reference Standard

Tolcapone USP Related Compound B chemical structure

Tolcapone USP Related Compound B

CAS: 134612-80-9
Formula: C₁₅H₁₃NO₅
MW: 287.27 g/mol

VQ-028433

Reference Standard

Toldimfos sodium chemical structure

Toldimfos sodium

CAS: 575-75-7
Formula: C₉H₁₂NNaO₂P⁺
MW: 220.16 g/mol

VQ-042592

Reference Standard

Toldimfos Sodium Trihydrate

Toldimfos Sodium Trihydrate

CAS: 5787-63-3
Formula: C₉H₁₆NNaO₃P
MW: 240.19 g/mol

VQ-042591

Reference Standard

Tolfenamic Acid chemical structure

Tolfenamic Acid

CAS: 13710-19-5
Formula: C₁₄H₁₂ClNO₂
MW: 261.7 g/mol

VQ-028434

Reference Standard

Tolfenamic acid EP Impurity C chemical structure

Tolfenamic acid EP Impurity C

CAS: 1609192-68-8
Formula: C₁₄H₁₀ClNO
MW: 243.69 g/mol

VQ-034318

Reference Standard

Tolmetin chemical structure

CAS: 26171-23-3
Formula: C₁₅H₁₅NO₃
MW: 257.28 g/mol

In stock

Reference Standard

Tolmetin 3-Isomer

Tolmetin 3-Isomer

CAS: 2514774-66-2
Formula: C₁₅H₁₄NNaO₃
MW: 279.27 g/mol

VQ-034324

Reference Standard

Tolmetin Beta-D-Glucuronide chemical structure

Tolmetin Beta-D-Glucuronide

CAS: 71595-19-2
Formula: C₂₁H₂₃NO₉
MW: 433.4 g/mol

VQ-042593

Reference Standard

Tolmetin Impurity 6 chemical structure

Tolmetin Impurity 6

CAS: 33369-52-7
Formula: C₁₆H₁₇NO₃
MW: 271.31 g/mol

In stock

Reference Standard

Tolnaftate chemical structure

CAS: 2398-96-1
Formula: C₁₉H₁₇NOS
MW: 307.4 g/mol

VQ-028435

Reference Standard

Tolnaftate EP Impurity B chemical structure

Tolnaftate EP Impurity B

CAS: 127084-74-6
Formula: C₂₁H₁₄O₂S
MW: 330.4 g/mol

VQ-028436

Reference Standard

Tolnaftate EP Impurity D chemical structure

Tolnaftate EP Impurity D

CAS: 696-44-6
Formula: C₈H₁₁N
MW: 121.18 g/mol

VQ-028437

Reference Standard

Tolnaftate Impurity A chemical structure

Tolnaftate Impurity A

CAS: 135-19-3
Formula: C₁₀H₈O
MW: 144.17 g/mol

In stock

Reference Standard

Tolperisone chemical structure

CAS: 728-88-1
Formula: C₁₆H₂₃NO
MW: 245.36 g/mol

VQ-034325

Reference Standard

Tolperisone Hydrochloride chemical structure

Tolperisone Hydrochloride

CAS: 3644-61-9
Formula: C₁₆H₂₄ClNO
MW: 281.82 g/mol

VQ-023913

Reference Standard

Tolperisone-d10 Hydrochloride chemical structure

Tolperisone-d10 Hydrochloride

CAS: 1185160-65-9
Formula: C₁₆H₂₄ClNO
MW: 291.88 g/mol

VQ-042595

Reference Standard

Tolteridone Mesyl Impurity chemical structure

Tolteridone Mesyl Impurity

CAS: 882878-66-2
Formula: C₁₈H₂₂O₄S
MW: 334.4 g/mol

VQ-034329

Reference Standard

Tolterodine Acid chemical structure

Tolterodine Acid

CAS: 194482-44-5
Formula: C₂₂H₂₉NO₃
MW: 355.5 g/mol

VQ-025769

Reference Standard

Tolterodine Dimer chemical structure

Tolterodine Dimer

CAS: 854306-72-2
Formula: C₃₅H₄₁NO₂
MW: 507.7 g/mol

VQ-034328

Reference Standard

Tolterodine Diol Acetate Impurity chemical structure

Tolterodine Diol Acetate Impurity

CAS: 2514856-06-3
Formula: C₁₈H₂₀O₃
MW: 284.3 g/mol

VQ-028446

Reference Standard

Tolterodine diol impurity chemical structure

Tolterodine diol impurity

CAS: 851789-43-0
Formula: C₁₆H₁₈O₂
MW: 242.31 g/mol

VQ-028445

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