Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Fluorescein, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Fluorescein 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 Fluorescein-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.
Our Fluorescein-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.
Fluorescein Related Compounds
API Standards
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Dibenzylfluorescein | API Standards | CS-T-88199 | 97744-44-0 | Enquire |
| Fluorescein | API Standards | CS-T-54762 | 2321-07-5 | Enquire |
| Fluorescein Biotin | API Standards | CS-T-77664 | 134759-22-1 | Enquire |
| Fluorescein Dibutyrate | API Standards | CS-T-75167 | 7298-65-9 | Enquire |
| Fluorescein Sodium | API Standards | CS-T-74595 | 518-47-8 | In Stock |
| Fluoresceinamine | API Standards | CS-T-75581 | 27599-63-9 | Enquire |
| Fluorescein-dUTP | API Standards | CS-T-75707 | 214154-36-6 | Enquire |
Impurities
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| "6-Carboxy-2,7-dichlorofluorescein 3,6-Diacetate Succinimidy... | Impurities | CS-T-50314 | 852299-81-1 | Enquire |
| "6-Carboxyfluorescein 3',6'-Dipivaloyl N-(1-Methylethyl)-2-p... | Impurities | CS-T-50335 | 847569-43-1 | Enquire |
| "Fluorescein 6-Isothiocyanate, Isomer 2" | Impurities | CS-T-23807 | 18861-78-4 | Enquire |
| "Fluoresceinamine, Isomer 2," | Impurities | CS-T-54766 | 51649-83-3 | Enquire |
| (L)-2-[(t-Boc)amino]-2-[(5-Fluoresceinyl)aminocarbonyl]ethyl... | Impurities | CS-T-49482 | 1042688-20-9 | Enquire |
| 2-[(5-Fluoresceinyl)aminocarbonyl]ethyl Methanethiosulfonate | Impurities | CS-T-54789 | 351330-42-2 | Enquire |
| 5(6)-Carboxy-2,7-dichlorofluorescein diacetate N-succinimidy... | Impurities | CS-T-50316 | 147265-60-9 | Enquire |
| 5(6)-Carboxyfluorescein Diisobutyrate | Impurities | CS-T-50331 | 287111-44-8 | Enquire |
| 5(6)-Nitrofluorescein | Impurities | CS-DL-00620 | 78512-32-0 | Enquire |
| 6-(Fluorescein-5-carboxamido)hexanoic Acid Succinimidyl Este... | Impurities | CS-T-54769 | 148356-00-7 | Enquire |
| 6-[Fluorescein-5(6)-carboxamido]hexanoic acid N-hydroxysucci... | Impurities | CS-T-77174 | 114616-31-8 | Enquire |
| Diacetylfluorescein | Impurities | CS-T-52382 | 596-09-8 | Enquire |
| Fluorescein 5-Isothiocyanate, Isomer 1 | Impurities | CS-T-23806 | 3326-32-7 | Enquire |
| Fluorescein 5-Maleimide | Impurities | CS-T-54771 | 75350-46-8 | Enquire |
| Fluorescein 6-Maleimide | Impurities | CS-T-54775 | 161598-40-9 | Enquire |
| Fluorescein Alkynylamino-ATP | Impurities | CS-T-54763 | 185971-89-5 | Enquire |
| Fluorescein Monoacetate | Impurities | CS-O-47455 | 7262-41-1 | Enquire |
| Fluorescein-5-iodoacetamide | Impurities | CS-DL-00736 | 63368-54-7 | Enquire |
| Fluoresceinamine Hydrochloride Isomer 1 | Impurities | CS-T-54765 | 53360-53-5 | Enquire |
| Fluoresceinamine, Isomer 1 | Impurities | CS-T-54764 | 3326-34-9 | Enquire |
| Fluorescein-Cadaverine Dihydrobromide | Impurities | CS-T-54768 | 786705-84-8 | Enquire |
| Fluorescein-O’-acetic Acid | Impurities | CS-T-75810 | 233759-98-3 | Enquire |
| N-(5-Fluoresceinyl)-L-carnitine-O-thiocarbamate | Impurities | CS-T-54790 | 1258239-73-4 | Enquire |
| O-Mono Acetyl Fluorescein | Impurities | CS-EO-03267 | 1104-16-1 | Enquire |
Intermediates
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| "2,7-Dichlorodihydrofluorescein Diacetate" | Intermediates | CS-T-17521 | 4091-99-0 | Enquire |
| "2’,7’-Difluorofluorescein" | Intermediates | CS-T-89426 | 195136-58-4 | Enquire |
| "4’,5’-Dibromofluorescein" | Intermediates | CS-T-89003 | 596-03-2 | Enquire |
| "5-(4,6-Dichloro-s-triazin-2-ylamino)fluorescein Hydrochlori... | Intermediates | CS-T-90688 | 21811-74-5 | Enquire |
| "5(6)-Carboxy-2’,7’-dichlorofluorescein" | Intermediates | CS-T-68769 | 111843-78-8 | Enquire |
| "Nitrofluorescein, Isomer 1" | Intermediates | CS-T-59413 | 3326-35-0 | Enquire |
| 2,4-Dihydroxy-2-benzoylbenzoic Acid | Intermediates | CS-T-19092 | 2513-33-9 | Enquire |
| 2-[(5-Fluoresceinyl)aminocarbonyl]ethyl Mercaptan | Intermediates | CS-T-54788 | 887355-27-3 | Enquire |
| 2´,7´-Dichlorofluorescein, A.C.S. Reagent | Intermediates | CS-H-00291 | 76-54-0 | Enquire |
| 2’,7’-Dichlorofluorescein diacetate | Intermediates | CS-T-88895 | 2044-85-1 | Enquire |
| 3-O-Methylfluorescein Phosphate Cyclohexylammonium Salt | Intermediates | CS-T-81905 | 21233-09-0 | Enquire |
| 5(6)-Carboxy-2’,7’-dichlorofluorescein 3’,6’-Diacetate | Intermediates | CS-T-50315 | 127770-45-0 | Enquire |
| 5(6)-Carboxyfluorescein | Intermediates | CS-T-50326 | 72088-94-9 | Enquire |
| 5(6)-Carboxyfluorescein Diacetate | Intermediates | CS-T-70434 | 124387-19-5 | Enquire |
| 5(6)-Carboxyfluorescein N-hydroxysuccinimide ester | Intermediates | CS-DA-00556 | 117548-22-8 | Enquire |
| 5(6)-Carboxynaphthofluorescein | Intermediates | CS-T-69245 | 128724-35-6 | Enquire |
| 5(6)-Carboxynaphthofluorescein diacetate | Intermediates | CS-ED-37470 | 163831-68-3 | Enquire |
| 5-(Bromomethyl)fluorescein | Intermediates | CS-T-71125 | 148942-72-7 | Enquire |
| 5-(Hexadecanoylamino)fluorescein | Intermediates | CS-T-55556 | 73024-80-3 | Enquire |
| 5-Acetamidofluorescein-di-(β-D-galactopyranoside) | Intermediates | CS-CA-00107 | 216299-45-5 | Enquire |
| 5-Carboxyfluorescein | Intermediates | CS-T-50327 | 76823-03-5 | Enquire |
| 5-Carboxyfluorescein Diacetate | Intermediates | CS-T-50332 | 79955-27-4 | Enquire |
| 5-Carboxy-fluorescein Diacetate N-Succinimidyl Ester | Intermediates | CS-T-70903 | 150206-05-6 | Enquire |
| 5-Carboxyfluorescein-N-hydroxysuccinimide Ester | Intermediates | CS-T-50333 | 92557-80-7 | Enquire |
| 6-(Fluorescein-5-carboxamido)hexanoic Acid | Intermediates | CS-T-75135 | 194661-60-4 | Enquire |
| 6-[Fluorescein-5(6)-carboxamido]hexanoic Acid | Intermediates | CS-T-77681 | 265981-56-4 | Enquire |
| 6-Carboxyfluorescein | Intermediates | CS-T-50328 | 3301-79-9 | Enquire |
| 6-Carboxyfluorescein 3,6-Diacetate N-Succinimidyl Ester | Intermediates | CS-T-50329 | 150206-15-8 | Enquire |
| 6-Carboxyfluorescein-N-hydroxysuccinimide Ester | Intermediates | CS-T-50334 | 92557-81-8 | Enquire |
| 6-Fluorescein Isothiocyanate | Intermediates | CS-T-77733 | 3326-31-6 | Enquire |
| Cholyl-L-Lysyl-Fluorescein (CLF) | Intermediates | CS-Y-00127 | 140616-46-2 | Enquire |
| CMP-9-fluoresceinyl-NeuAc | Intermediates | CS-T-51557 | 118720-35-7 | Enquire |
| Dihydrofluorescein diacetate | Intermediates | CS-T-89648 | 35340-49-9 | Enquire |
| Fluorescein di(β-D-galactopyranoside) | Intermediates | CS-CA-00003 | 17817-20-8 | Enquire |
| Fluorescein Diacetate 5(6)-isothiocyanate | Intermediates | CS-T-75164 | 871487-69-3 | Enquire |
| Fluorescein Isothiocyanate | Intermediates | CS-T-76655 | 27072-45-3 | Enquire |
| FLUORESCEIN MONO-β-D-GALACTOPYRANOSIDE | Intermediates | CS-CA-00004 | 102286-67-9 | Enquire |
| Fluoresceinamine Maleic Acid Monoamide | Intermediates | CS-T-54767 | 75900-74-2 | Enquire |
| Fluorescein-diacetate-5-isothiocyanate | Intermediates | CS-T-77045 | 118378-76-0 | Enquire |
| Fluorescein-Dipalmitoylphosphatidylethanolamine | Intermediates | CS-T-54770 | 87706-98-7 | Enquire |
| Fluoresceinyl Gabazine, Bromide | Intermediates | CS-T-54791 | 1024389-03-4 | Enquire |
| MTSEA-Fluorescein | Intermediates | CS-ED-05365 | 1356019-48-1 | Enquire |
| Naphthofluorescein | Intermediates | CS-T-82776 | 61419-02-1 | Enquire |
| Naphthofluorescein Di-(ß-D-galactopyranoside) | Intermediates | CS-T-83353 | 133551-98-1 | Enquire |
| N-Butylfluorescein | Intermediates | CS-T-50088 | 335193-91-4 | Enquire |
| O-Methyl-O-(N-butylfluorescein)phosphate | Intermediates | CS-T-58035 | 887406-94-2 | Enquire |
Glucuronides
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| Fluorescein Glucuronide | Glucuronides | CS-B-00279 | 74804-84-5 | Enquire |
Fine Chemicals
| COMPOUND | CATEGORY | CAT. No. | CAS. No. | STOCK STATUS |
|---|---|---|---|---|
| 2,4,7-TRIIODOFLUORESCEIN | Fine Chemicals | CS-O-34359 | 83498-90-2 | Enquire |
| Biotin-4-Fluorescein | Fine Chemicals | CS-T-49125 | 1032732-74-3 | Enquire |