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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Quercetin, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Quercetin impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Quercetin-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Quercetin Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3’,4’-Di-O-Methoxy 3,7-Bis(benzyloxy) Quercetin-d6 Stable Isotopes CS-T-101470 Not Available Enquire
3'-O-Methyl Quercetin 3-O-β-D-Glucuronide-d3 Stable Isotopes CS-T-98427 Not Available Enquire
3'-O-Methyl-d3 Quercetin Stable Isotopes CS-T-102229 Not Available Enquire
3-O-Methyl-d3 Quercetin Stable Isotopes CS-T-101027 Not Available Enquire
4'-O-Methyl-d3 Quercetin Stable Isotopes CS-T-102228 Not Available Enquire
5-O-Methyl-d3 Quercetin Stable Isotopes CS-T-101026 Not Available Enquire
7-O-Methyl-d3 Quercetin Stable Isotopes CS-T-101025 Not Available Enquire
Quercetin 3-O-β-xyloside-d3 Stable Isotopes CS-T-98816 Not Available Enquire
Quercetin 4'-Glucoside-d3 Stable Isotopes CS-T-93974 20229-56-5 (Unlabeled) Enquire
Quercetin D5 Stable Isotopes CS-O-47476 263711-78-0 Enquire
Quercetin-[13C3] Stable Isotopes CS-I-00533 Not Available Enquire
Quercetin-d3 Stable Isotopes CS-T-61004 263711-79-1 In Stock
Quercetin 13C15 Stable Isotopes CS-EK-01203 1261398-41-7 Enquire
Quercetin 13C6 Stable Isotopes CS-EK-02098 1261398-19-9 Enquire
Quercetin-3-O-beta-D-glucuronide 13C6 Stable Isotopes CS-EK-02138 22688-79-5 unlabeled Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Quercetin API CS-O-02217 117-39-5 In Stock
Quercetin dihydrate API CS-O-11728 6151-25-3 In Stock
Quercetin Hydrate API CS-DE-00105 849061-97-8 In Stock


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Quercetin-7-O-β-D-glucopyranoside Metabolite CS-BP-00012 491-50-9 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Quercetin 4'-Glucoside Impurity CS-T-61003 20229-56-5 In Stock
3-O-Methylquercetin tetraacetate Impurity CS-BT-00123 1486-69-7 Enquire
cis-Dihydroquercetin Impurity CS-T-91370 114761-89-6 Enquire
Quercetin 3-(6-O-galloylgalactoside) Impurity CS-E-02790 53171-28-1 Enquire
Quercetin 3,4'-Diglucoside Impurity CS-T-61002 29125-80-2 Enquire
Quercetin 3-O-β-xyloside Impurity CS-T-61009 549-32-6 Enquire
Quercetin 3-Sulfate Potassium Salt Impurity CS-T-61008 121241-74-5 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3'-O-Methyl Quercetin Intermediate CS-T-34952 480-19-3 In Stock
Isoquercitroside Intermediate CS-BO-00008 21637-25-2 In Stock
Quercetin 3-O-β-D Glucoside Intermediate CS-T-86073 482-35-9 In Stock


Glucuronide

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3’-O-Methyl Quercetin 3-O-ß-D-Glucuronide Glucuronide CS-T-81172 36687-76-0 Enquire
Quercetin 3-glucoside-7-glucuronide Glucuronide CS-ED-00024 Not Available Enquire
Quercetin 7-O-beta-D-Glucuronide Glucuronide CS-ED-00648 38934-20-2 Enquire
Quercetin-β-O-β-D-Glucuronide Glucuronide CS-T-61005 22688-79-5 Enquire