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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Xanthene, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Xanthene 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 Xanthene-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.

Xanthene Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
9-Oxo-xanthene-2-carboxylic Acid Methyl Ester-D3 Stable Isotopes CS-T-102158 Not Available Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-[6-(Ethylamino)-3-(ethylimino)-2,7-dimethyl-3H-xanthene-9-... Impurity CS-H-00292 989-38-8 Enquire
N,N-Dimethyl-9-oxothioxanthene-2-sulfonamide Impurity CS-O-34055 3285-53-8 Enquire
3,4,5,6,7,9-Hexahydro-9-(4-hydroxyphenyl)-3,3,6,6-tetramethy... Impurity CS-T-79298 37797-12-9 Enquire
3,6-Thioxanthenediamine-10,10-dioxide Impurity CS-T-44279 10215-25-5 Enquire
6-(Trifluoromethyl)-3,4-dihydro-1H-xanthene-1,9(2H)-dione Impurity CS-EO-01540 2650309-60-5 Enquire
9-Oxo-9H-thioxanthene-3-carboxylic acid 10,10-dioxide Impurity CS-M-48233 51762-52-8 Enquire
9-Oxo-xanthene-2-carboxylic Acid Methyl Ester Impurity CS-T-38389 42946-50-9 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3,6-Dichloroxanthene-9-carboxylic acid Intermediate CS-O-49810 136453-32-2 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
9H-Xanthene-1,3,6,8-tetrol Fine Chemicals CS-O-35258 27393-39-1 Enquire
2,7-dibromospiro[9H-fluorene-9,9-[9H]xanthene] Fine Chemicals CS-O-38571 1346002-88-7 Enquire
6-(methylsulfonyl)-9-oxo-9H-xanthene-1-carbonitrile Fine Chemicals CS-O-32933 Not Available Enquire


Stable Isotope Reagent

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Xanthene-D2 Stable Isotope Reagent CS-T-103589 24624-32-6 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2,3-dihydrospiro[indene-1,9'-xanthene]-3',4',5',6'-tetraol Building Blocks CS-O-35378 Not Available Enquire
9-bromo-9-phenyl-9H-xanthene-3,4,5,6-tetraol Building Blocks CS-O-35379 Not Available Enquire
spiro[cyclohexane-1,9'-xanthene]-3',4',5',6'-tetraol Building Blocks CS-O-35380 856068-90-1 Enquire


Carbohydrates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
9-Methyl xanthene-1,3,6,8-tetraol Carbohydrates CS-OC-00043 Not Available Enquire


Catalyst

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Methanesulfonato[9,9-dimethyl-4,5-bis(diphenylphosphino)xant... Catalyst CS-BX-01172 1445085-97-1 Enquire
Dichloro[9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene]pal... Catalyst CS-BX-01198 205319-10-4 Enquire
Methanesulfonato[4;5-Bis(diphenylphosphino)-9;9-dimethylxant... Catalyst CS-BX-01186 1621274-19-8 Enquire