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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

Dimethyl2-(4-chloro-2-nitrophenyl)malonate chemical structure

Dimethyl2-(4-chloro-2-nitrophenyl)malonate

CAS: 147124-32-1
Formula: C₁₁H₁₀ClNO₆
MW: 287.65 g/mol

VQ-032816

Reference Standard

Dimethylandrostadiol chemical structure

Dimethylandrostadiol

CAS: 896717-01-4
Formula: C₂₁H₃₆O₂
MW: 320.5 g/mol

VQ-042268

Reference Standard

Dimethylprocaine chemical structure

Dimethylprocaine

CAS: 10012-47-2
Formula: C₁₁H₁₆N₂O₂
MW: 208.26 g/mol

VQ-034175

Reference Standard

Dimethylsildenafil chemical structure

Dimethylsildenafil

CAS: 1416130-63-6
Formula: C₂₃H₃₂N₆O₄S
MW: 488.6 g/mol

VQ-035384

Reference Standard

Dinoprostone chemical structure

CAS: 363-24-6
Formula: C₂₀H₃₂O₅
MW: 352.5 g/mol

VQ-021515

Reference Standard

Dioctyl Carbonate chemical structure

Dioctyl Carbonate

CAS: 1680-31-5
Formula: C₁₇H₃₄O₃
MW: 286.4 g/mol

VQ-051250

Reference Standard

Dioctyl maleate chemical structure

Dioctyl maleate

CAS: 2915-53-9
Formula: C₂₀H₃₆O₄
MW: 340.5 g/mol

VQ-040772

Reference Standard

Dioctyltin bis(2-ethylhexyl thioglycolate) chemical structure

Dioctyltin bis(2-ethylhexyl thioglycolate)

CAS: 15571-58-1
Formula: C₃₆H₇₂O₄S₂Sn
MW: 751.8 g/mol

VQ-040166

Reference Standard

Diosmetin 7-O-beta-D-glucoside chemical structure

Diosmetin 7-O-beta-D-glucoside

CAS: 20126-59-4
Formula: C₂₂H₂₂O₁₁
MW: 462.4 g/mol

VQ-030223

Reference Standard

Diphenhydramine methiodide chemical structure

Diphenhydramine methiodide

CAS: 14177-81-2
Formula: C₁₈H₂₄INO
MW: 397.3 g/mol

VQ-030229

Reference Standard

Diphenoxylate Impurity 1B chemical structure

Diphenoxylate Impurity 1B

CAS: 158144-79-7
Formula: C₁₇H₂₂N₂O₂
MW: 286.37 g/mol

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Reference Standard

Diphenyl piperidin 3 yl methanol chemical structure

Diphenyl piperidin 3 yl methanol

CAS: 88783-30-6
Formula: C₁₈H₂₁NO
MW: 267.4 g/mol

VQ-048367

Reference Standard

Diphenyl R 1 6 amino 9h purin 9 yl propan 2 yl oxy methyl phosphonate chemical structure

Diphenyl R 1 6 amino 9h purin 9 yl propan 2 yl oxy methyl phosphonate

CAS: 342631-41-8
Formula: C₂₁H₂₂N₅O₄P
MW: 439.4 g/mol

VQ-034112

Reference Standard

Diphenyl(quinuclidin-4-yl)methanol chemical structure

Diphenyl(quinuclidin-4-yl)methanol

CAS: 461648-39-5
Formula: C₂₀H₂₃NO
MW: 293.4 g/mol

VQ-023948

Reference Standard

Diphenylacetaldehyde chemical structure

Diphenylacetaldehyde

CAS: 947-91-1
Formula: C₁₄H₁₂O
MW: 196.24 g/mol

VQ-039814

Reference Standard

Diphenylacetyl Chloride chemical structure

Diphenylacetyl Chloride

CAS: 1871-76-7
Formula: C₁₄H₁₁ClO
MW: 230.69 g/mol

VQ-021623

Reference Standard

Diphenylmethyl Mesylate chemical structure

Diphenylmethyl Mesylate

CAS: 135513-20-1
Formula: C₁₄H₁₄O₃S
MW: 262.33 g/mol

VQ-043912

Reference Standard

Dipropylmalonic acid chemical structure

Dipropylmalonic acid

CAS: 1636-27-7
Formula: C₉H₁₆O₄
MW: 188.22 g/mol

VQ-032493

Reference Standard

Dipropylmalonic acid monoethyl ester chemical structure

Dipropylmalonic acid monoethyl ester

CAS: 258264-00-5
Formula: C₁₁H₂₀O₄
MW: 216.27 g/mol

VQ-034528

Reference Standard

Dipyridamole Tetrachloro Impurity chemical structure

Dipyridamole Tetrachloro Impurity

CAS: 32980-71-5
Formula: C₆Cl₄N₄
MW: 269.9 g/mol

VQ-032617

Reference Standard

Dipyridamole Trichloro Impurity chemical structure

Dipyridamole Trichloro Impurity

CAS: 1449029-14-4
Formula: C₁₁H₁₀Cl₃N₅
MW: 318.6 g/mol

VQ-036736

Reference Standard

Diricinoleoyl Linoleoyl Glycerol Impurity

Diricinoleoyl Linoleoyl Glycerol Impurity

Formula: C₅₇H₁₀₂O₈
MW: 915.41 g/mol

VQ-004803

Reference Standard

Diricinoleoyl Oleoyl Glycerol Impurity

Diricinoleoyl Oleoyl Glycerol Impurity

Formula: C₅₇H₁₀₄O₈
MW: 917.43 g/mol

VQ-004804

Reference Standard

Diricinoleoyl Palmitoyl Glycerol Impurity chemical structure

Diricinoleoyl Palmitoyl Glycerol Impurity

CAS: 2281875-36-1
Formula: C₅₅H₁₀₂O₈
MW: 891.4 g/mol

VQ-004805

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