Fluorescein Impurity 9 CAS CATO-C4X-29009
| CAS No. | CATO-C4X-29009 |
| Molecular Formula | C22H16O7S |
| Molecular Weight | 424.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Fluorescein Impurity 9.
As a process- or degradation-related impurity, Fluorescein Impurity 9 (CAS CATO-C4X-29009, C22H16O7S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Fluorescein Impurity 9 (C22H16O7S) contains a flavonoid core, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 15.0, corresponding to approximately 15 ring(s) or double-bond equivalent(s). With a molecular weight of 424.42 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO manufactures Fluorescein Impurity 9 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C22H16O7S |
| Molecular Weight | 424.42 g/mol |
| Purity | >90% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Sulfur Atoms | 1 |
Related Fluorescein Standards
- Fluorescein Impurity 8 (CAS CATO-C4X-29008)
- Fluorescein 6-Maleimide (CAS 161598-40-9)
- Fluorescein Diacetate (CAS 596-09-8)
- 76863-28-0 Fluorescein-5-thiosemicarbazide MFCD04221206 N-(3',6'-Dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5-yl)-hydrazinecarbothioamide (CAS 76863-28-0)
- Fluorescein Impurity 10 (CAS CATO-C4X-290010)
- Fluorescein<I>o</I>-acrylate (CAS 193419-86-2)
- Fluorescein dipropionate (CAS 7276-28-0)
- Fluorescein Impurity 12 (CAS CATO-C4X-290012)
Recommended Standards
- 37793-53-6 4-(N-((2-Amino-4-oxo-3,4-dihydropteridin-6-yl)methyl)-2,2,2-trifluoroacetamido)benzoic acid AC1NCZ59 N10-Trifluroacetylpteroic acid (CAS 37793-53-6)
- N-(3-methoxy-5-methyl-2-pyrazinyl)-2-[4-(1,3,4-oxadiazol-2-yl)phenyl]-3-pyridinesulfonamide (CAS 186497-07-4)
- N-(4-methoxyphenyl)-1-(1-methyl-2-(3-(trifluoromethyl)phenoxy)-1H-indol-3-yl)methanimine (CAS 866017-46-1)
- (((2S,3S,4R)-3-hydroxy-4-(2-hydroxyphenoxy)tetrahydro-2H-pyran-2-yl)methyl)diphenylphosphine oxide (CAS 291273-51-3)
- Metaraminol Impurity 91 (CAS CATO-C4X-225291)
- Semaglutide impurity 84 (CAS CATO-C4X-222684)
- Pentoxyverine impurity 20 (CAS 855910-45-1)
- 1-(5-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)piperazine hydrochloride (CAS 2222758-60-1)
- 3-Amino-7-oxabicyclo[2.2.1]hept-5-ene-2-carboxamide hydrochloride (CAS 885096-06-0)
- 4-(2'-Methyl-3,4,5,6-tetrahydro-[2,3'-bipyridin]-6'-yl)morpholine (CAS 1352507-58-4)
- 2-(4-Allyloxy-phenyl)-thiazolidine-4-carboxylicacid (CAS 1023920-36-6)
- 2-(2,3-Difluorophenyl)-1h-imidazo[4,5-c]pyridine (CAS 858935-15-6)
- Ethyl (pyrazin-2-ylmethyl)carbamate (CAS 500892-70-6)
- Des-Ser39-Tirzepatide (CAS CATO-CPTD788936)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com