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Impurities & Reference Standards

Pharmacopeial Impurities (EP / USP / BP)

578 pharmacopeial impurities (ep / usp / bp) with CAS numbers, structures and specifications — batch COA and GHS SDS supplied.

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427in stock

COA + SDSwith every lot

Reference Standard

Mesalazine EP Impurity J DiHCl chemical structure

Mesalazine EP Impurity J DiHCl

CAS: 2514682-10-9
Formula: C₇H₈N₂O₃
MW: 168.15 g/mol

VQ-038318

Reference Standard

Mesalazine EP Impurity P chemical structure

Mesalazine EP Impurity P

CAS: 887256-40-8
Formula: C₁₃H₁₁NO₆S
MW: 309.3 g/mol

VQ-023077

Reference Standard

Mesalazine EP Impurity R chemical structure

Mesalazine EP Impurity R

CAS: 85-38-1
Formula: C₇H₅NO₅
MW: 183.12 g/mol

VQ-023074

Reference Standard

Mesalazine EP Impurity S chemical structure

Mesalazine EP Impurity S

CAS: 1797983-23-3
Formula: C₁₄H₁₂N₂O₅
MW: 288.25 g/mol

VQ-023078

Reference Standard

Mesna EP Impurity A chemical structure

Mesna EP Impurity A

CAS: 25985-57-3
Formula: C₃H₈N₂O₃S₂
MW: 184.2 g/mol

VQ-026617

Reference Standard

Mesna EP Impurity B chemical structure

Mesna EP Impurity B

CAS: 1391053-66-9
Formula: C₄H₁₀N₄O₃S₂
MW: 226.3 g/mol

VQ-026618

Reference Standard

Mesna EP Impurity C chemical structure

Mesna EP Impurity C

CAS: 69536-71-6
Formula: C₄H₈O₄S₂
MW: 184.2 g/mol

VQ-034864

Reference Standard

Mesna EP impurity C (Sodium salt) chemical structure

Mesna EP impurity C (Sodium salt)

CAS: 76274-71-0
Formula: C₄H₇NaO₄S₂
MW: 206.2 g/mol

VQ-049055

Reference Standard

Mesna EP Impurity D chemical structure

Mesna EP Impurity D

CAS: 45127-11-5
Formula: C₄H₁₀O₆S₄
MW: 282.4 g/mol

VQ-026620

Reference Standard

Mesna EP Impurity D Disodium chemical structure

Mesna EP Impurity D Disodium

CAS: 16208-51-8
Formula: C₄H₈Na₂O₆S₄
MW: 326.4 g/mol

VQ-049054

Reference Standard

Mesna EP Impurity E chemical structure

Mesna EP Impurity E

CAS: 1391054-56-0
Formula: C₅H₉N₅O₃S₂
MW: 251.3 g/mol

VQ-026619

Reference Standard

Mesterolone EP Impurity A chemical structure

Mesterolone EP Impurity A

CAS: 604-26-2
Formula: C₂₀H₃₀O₂
MW: 302.5 g/mol

VQ-038328

Reference Standard

Mesterolone EP Impurity B chemical structure

Mesterolone EP Impurity B

CAS: 4011-44-3
Formula: C₂₀H₃₄O₂
MW: 306.5 g/mol

VQ-031803

Reference Standard

Metamizole EP Impurity A chemical structure

Metamizole EP Impurity A

CAS: 1672-58-8
Formula: C₁₂H₁₃N₃O₂
MW: 231.25 g/mol

VQ-023082

Reference Standard

Metamizole EP Impurity C chemical structure

Metamizole EP Impurity C

CAS: 519-98-2
Formula: C₁₂H₁₅N₃O
MW: 217.27 g/mol

VQ-023084

Reference Standard

Metamizole EP Impurity C HCl chemical structure

Metamizole EP Impurity C HCl

CAS: 856307-27-2
Formula: C₁₂H₁₆ClN₃O
MW: 253.73 g/mol

VQ-026621

Reference Standard

Metamizole EP Impurity E chemical structure

Metamizole EP Impurity E

CAS: 129-89-5
Formula: C₁₂H₁₄N₃NaO₄S
MW: 319.31 g/mol

VQ-026622

Reference Standard

Metamizole EP Impurity E chemical structure

Metamizole EP Impurity E

CAS: 117-38-4
Formula: C₁₂H₁₅N₃O₄S
MW: 297.33 g/mol

VQ-031807

Reference Standard

Metformin EP Impurity C chemical structure

Metformin EP Impurity C

CAS: 1985-46-2
Formula: C₅H₁₀N₆
MW: 154.17 g/mol

In stock

Reference Standard

Metformin EP Impurity C (Hydrochloride)

Metformin EP Impurity C (Hydrochloride)

CAS: 2827-50-1
Formula: C₅H₁₀N₆.ClH
MW: 190.63 g/mol

VQ-006501

Reference Standard

Methimazole EP Impurity A chemical structure

Methimazole EP Impurity A

CAS: 122-07-6
Formula: C₅H₁₃NO₂
MW: 119.16 g/mol

VQ-023875

Reference Standard

Methimazole EP Impurity C chemical structure

Methimazole EP Impurity C

CAS: 14486-52-3
Formula: C₅H₈N₂S
MW: 128.2 g/mol

VQ-023876

Reference Standard

Methionine EP Impurity A chemical structure

Methionine EP Impurity A

CAS: 3226-65-1
Formula: C₅H₁₁NO₃S
MW: 165.21 g/mol

VQ-023087

Reference Standard

Methionine EP Impurity B chemical structure

Methionine EP Impurity B

CAS: 7314-32-1
Formula: C₅H₁₁NO₄S
MW: 181.21 g/mol

VQ-023088

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