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Impurities & Reference Standards

API Impurities

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

14,252products

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COA + SDSwith every lot

Reference Standard

DL-Menthol chemical structure

CAS: 89-78-1
Formula: C₁₀H₂₀O
MW: 156.26 g/mol

VQ-031785

Reference Standard

DL-Norepinephrine 3-Sulfate chemical structure

DL-Norepinephrine 3-Sulfate

CAS: 112346-92-6
Formula: C₈H₁₁NO₆S
MW: 249.24 g/mol

VQ-026946

Reference Standard

DL-Panthenol chemical structure

CAS: 16485-10-2
Formula: C₉H₁₉NO₄
MW: 205.25 g/mol

VQ-030313

Reference Standard

DL-Pantothenic acid chemical structure

DL-Pantothenic acid

CAS: 599-54-2
Formula: C₉H₁₇NO₅
MW: 219.23 g/mol

VQ-041004

Reference Standard

DL-Penicillamine chemical structure

DL-Penicillamine

CAS: 52-66-4
Formula: C₅H₁₁NO₂S
MW: 149.21 g/mol

VQ-021308

Reference Standard

DL-Proline chemical structure

CAS: 609-36-9
Formula: C₅H₉NO₂
MW: 115.13 g/mol

VQ-039084

Reference Standard

DL-Threo-Droxidopa chemical structure

DL-Threo-Droxidopa

CAS: 3916-18-5
Formula: C₉H₁₁NO₅
MW: 213.19 g/mol

VQ-036846

Reference Standard

DL-threo-Methylphenidate hydrochloride chemical structure

DL-threo-Methylphenidate hydrochloride

CAS: 23655-65-4
Formula: C₁₄H₂₀ClNO₂
MW: 269.77 g/mol

VQ-044899

Reference Standard

DL-threo-Ritalinic Acid chemical structure

DL-threo-Ritalinic Acid

CAS: 54631-24-2
Formula: C₁₃H₁₇NO₂
MW: 219.28 g/mol

VQ-044851

Reference Standard

DMT-2′O-Methyl-rA(bz) Phosphoramidite chemical structure

DMT-2′O-Methyl-rA(bz) Phosphoramidite

CAS: 110782-31-5
Formula: C₄₈H₅₄N₇O₈P
MW: 888 g/mol

VQ-035464

Reference Standard

Docetaxel side chain impurity chemical structure

Docetaxel side chain impurity

CAS: 157580-39-7
Formula: C₂₂H₂₅NO₆
MW: 399.4 g/mol

VQ-024716

Reference Standard

Docosahexaenoic Acid Ethyl Ester chemical structure

Docosahexaenoic Acid Ethyl Ester

CAS: 81926-94-5
Formula: C₂₄H₃₆O₂
MW: 356.5 g/mol

VQ-030609

Reference Standard

Docosahexaenoic Acid Ethyl ester (E-Isomer) chemical structure

Docosahexaenoic Acid Ethyl ester (E-Isomer)

CAS: 84494-72-4
Formula: C₂₄H₃₆O₂
MW: 356.5 g/mol

VQ-049526

Reference Standard

Docosapentaenoic acid chemical structure

Docosapentaenoic acid

CAS: 25182-74-5
Formula: C₂₂H₃₄O₂
MW: 330.5 g/mol

VQ-039109

Reference Standard

Docosapentaenoic acid ethyl ester chemical structure

Docosapentaenoic acid ethyl ester

CAS: 142828-42-0
Formula: C₂₄H₃₈O₂
MW: 358.6 g/mol

VQ-037647

Reference Standard

Docusate Impurity 4 Sodium

Docusate Impurity 4 Sodium

CAS: 7376-35-4
Formula: C₂₈H₅₄O₅
MW: 470.73 g/mol

VQ-048057

Reference Standard

Docusate Sodium Related Compound B chemical structure

Docusate Sodium Related Compound B

CAS: 82829-43-4
Formula: C₁₂H₂₁NaO₇S
MW: 332.35 g/mol

VQ-036767

Reference Standard

Dodecamethylcyclohexasiloxane chemical structure

Dodecamethylcyclohexasiloxane

CAS: 540-97-6
Formula: C₁₂H₃₆O₆Si₆
MW: 444.92 g/mol

VQ-029953

Reference Standard

Dodecyl Hydrogen Azelate chemical structure

Dodecyl Hydrogen Azelate

CAS: 94109-08-7
Formula: C₂₁H₄₀O₄
MW: 356.5 g/mol

VQ-029324

Reference Standard

Dofetilide Impurity 16

Dofetilide Impurity 16

CAS: 1226154-86-4
Formula: C₁₀H₁₆N₂O
MW: 180.3 g/mol

VQ-036772

Reference Standard

Dofetilide Impurity 3 chemical structure

Dofetilide Impurity 3

CAS: 85176-37-0
Formula: C₉H₁₂N₂O₂
MW: 180.2 g/mol

VQ-048062

Reference Standard

Dolutegravir Hydroxy Impurity chemical structure

Dolutegravir Hydroxy Impurity

CAS: 1973402-05-9
Formula: C₂₀H₁₉F₂N₃O₅
MW: 419.4 g/mol

In stock

Reference Standard

Dolutegravir Impurity 117 chemical structure

Dolutegravir Impurity 117

CAS: 2384108-26-1
Formula: C₁₇H₁₄F₂N₂O₆
MW: 380.3 g/mol

VQ-030265

Reference Standard

Dolutegravir Impurity 13

Dolutegravir Impurity 13

Formula: C₂₇H₂₄F₄N₄O₄
MW: 544.5 g/mol

In stock

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