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Impurities & Reference Standards

API Impurities

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

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Reference Standard

Menthyl Acetate chemical structure

Menthyl Acetate

CAS: 89-48-5
Formula: C₁₂H₂₂O₂
MW: 198.3 g/mol

VQ-043356

Reference Standard

Mepivacaine chemical structure

CAS: 96-88-8
Formula: C₁₅H₂₂N₂O
MW: 246.35 g/mol

VQ-029541

Reference Standard

Meropenem Impurity 1 chemical structure

Meropenem Impurity 1

CAS: 90822-24-5
Formula: C₁₇H₁₈N₄O₇
MW: 390.3 g/mol

VQ-049045

Reference Standard

Mertansine Impurity 6 chemical structure

Mertansine Impurity 6

CAS: 1613362-80-3
Formula: C₅₁H₆₆ClN₅O₁₆S
MW: 1072.6 g/mol

VQ-038315

Reference Standard

Mesalazine N-Beta-D-Glucoside chemical structure

Mesalazine N-Beta-D-Glucoside

CAS: 123135-21-7
Formula: C₁₃H₁₇NO₈
MW: 315.28 g/mol

VQ-038320

Reference Standard

Mesna Impurity chemical structure

CAS: 1823982-49-5
Formula: C₄H₉N₃O₄S₂
MW: 227.3 g/mol

VQ-031801

Reference Standard

Mesna Impurity 2 chemical structure

Mesna Impurity 2

CAS: 1110574-95-2
Formula: C₅H₈Na₂O₇S₄
MW: 354.4 g/mol

VQ-049056

Reference Standard

Mesna Related Compound A (2-(Acetylthio)ethane-1-sulfonic acid, potassium salt, crystal adduct with potassium chloride) (1392818) chemical structure

Mesna Related Compound A (2-(Acetylthio)ethane-1-sulfonic acid, potassium salt, crystal adduct with potassium chloride) (1392818)

CAS: 2820170-85-0
Formula: C₄H₈O₄S₂
MW: 184.2 g/mol

VQ-038327

Reference Standard

Mesosulfuron-methyl chemical structure

Mesosulfuron-methyl

CAS: 208465-21-8
Formula: C₁₇H₂₁N₅O₉S₂
MW: 503.5 g/mol

VQ-032668

Reference Standard

Met(O) 27 Glucagon

Met(O) 27 Glucagon

CAS: 75217-63-9
Formula: C₁₅₃H₂₂₅N₄₃O₅₀S
MW: 3498.7 g/mol

VQ-031010

Reference Standard

meta-Mirabegron chemical structure

meta-Mirabegron

CAS: 1684452-81-0
Formula: C₂₁H₂₄N₄O₂S
MW: 396.5 g/mol

VQ-023148

Reference Standard

Metacycline chemical structure

CAS: 914-00-1
Formula: C₂₂H₂₂N₂O₈
MW: 442.4 g/mol

VQ-025404

Reference Standard

Metamizole Hemi Magnesium chemical structure

Metamizole Hemi Magnesium

CAS: 6150-97-6
Formula: C₂₆H₃₂MgN₆O₈S₂
MW: 645 g/mol

VQ-031810

Reference Standard

Metaraminol Bitartrate Enantiomer chemical structure

Metaraminol Bitartrate Enantiomer

CAS: 27303-40-8
Formula: C₁₃H₁₉NO₈
MW: 317.29 g/mol

VQ-026626

Reference Standard

Metaxalone Impurity 2 chemical structure

Metaxalone Impurity 2

CAS: 102871-73-8
Formula: C₁₂H₁₅NO₃
MW: 221.25 g/mol

VQ-049059

Reference Standard

Metaxalone Impurity A chemical structure

Metaxalone Impurity A

CAS: 59365-66-1
Formula: C₁₁H₁₆O₃
MW: 196.24 g/mol

VQ-026628

Reference Standard

Metaxalone Related Compound A chemical structure

Metaxalone Related Compound A

CAS: 2514685-36-8
Formula: C₁₂H₁₆N₂O₂
MW: 220.27 g/mol

VQ-043224

Reference Standard

Metformin Impurity 5 chemical structure

Metformin Impurity 5

CAS: 847373-57-3
Formula: C₄H₇N₅
MW: 125.13 g/mol

VQ-038345

Reference Standard

Metformin Impurity 7 chemical structure

Metformin Impurity 7

CAS: 4390-68-5
Formula: C₂H₅N₃O₂
MW: 103.08 g/mol

VQ-038347

Reference Standard

Metformin Impurity 8 chemical structure

Metformin Impurity 8

CAS: 598-65-2
Formula: C₆H₂₀N₆O₄S
MW: 272.33 g/mol

VQ-049062

Reference Standard

Metformin Impurity A chemical structure

Metformin Impurity A

CAS: 461-58-5
Formula: C₂H₄N₄
MW: 84.08 g/mol

VQ-005259

Reference Standard

Metformin Impurity B (Freebase) chemical structure

Metformin Impurity B (Freebase)

CAS: 4405-08-7
Formula: C₄H₈N₈
MW: 168.16 g/mol

VQ-005260

Reference Standard

Metformin Impurity B (Hydrochloride) chemical structure

Metformin Impurity B (Hydrochloride)

CAS: 2959-04-8
Formula: C₄H₉ClN₈
MW: 204.62 g/mol

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Reference Standard

Metformin Impurity B (Nitrate Salt) chemical structure

Metformin Impurity B (Nitrate Salt)

CAS: 3553-49-9
Formula: C₄H₉N₉O₃
MW: 231.17 g/mol

VQ-005262

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