68807-90-9 Phenolphthalein diphosphate tetrasodium salt sodium 4,4'-(3-oxo-1,3-dihydroisobenzofuran-1,1-diyl)bis(4,1-phenylene) diphosphate CAS 68807-90-9
| CAS No. | 68807-90-9 |
| Molecular Formula | C20H30O10P2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
68807-90-9 Phenolphthalein diphosphate tetrasodium salt sodium 4,4'-(3-oxo-1,3-dihydroisobenzofuran-1,1-diyl)bis(4,1-phenylene) diphosphate (CAS 68807-90-9), molecular formula C20H30O10P2Na and molecular weight 515.39 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 68807-90-9 Phenolphthalein diphosphate tetrasodium salt sodium 4,4'-(3-oxo-1,3-dihydroisobenzofuran-1,1-diyl)bis(4,1-phenylene) diphosphate (C20H30O10P2Na) contains a phosphate ester group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 515.39 g/mol, it falls into the moderately-high-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C20H30O10P2 4*Na |
| Molecular Weight | 515.39 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
Related Phenolphthalein Standards
- Phenolphthalein monophosphate (dicyclohexylammonium) (CAS 14815-59-9)
- Phenolphthalein β-D-Glucuronide (CAS 15265-26-6)
- Phenolphthalein complex indicator (CAS 25296-54-2)
- Phenolphthalein Disodium Salt (CAS 518-51-4)
- Phenolphthalein disulfate potassium salt hydrate (CAS 62625-16-5)
- Phenolphthalein anilide (CAS 6607-41-6)
- Phenolphthalein 4′-O-β-D-glucuronide, sodium salt (CAS 6820-54-8)
- Phenolphthalein (CAS 77-09-8)
Recommended Standards
- 2-(3-Pyrazolyl)ethanamine (CAS 105-20-4)
- 2,4,6-Tris(2-bromophenyl)-1,3,5-triazine (CAS 1690315-37-7)
- sec-Butyl 1H-pyrrole-2-carboxylate (CAS 685563-22-8)
- n-(4-Ethoxyphenyl)methanesulfonamide (CAS 10406-66-3)
- 2-(2-Bromo-3-(difluoromethyl)-6-methylpyridin-4-yl)acetonitrile (CAS 1806913-48-3)
- N-[4-(3-Piperidinylmethoxy)phenyl]acetamidehydrochloride (CAS 1220028-28-3)
- 2,2-Difluoro-2-(1,1,2,2-tetrafluoro-2-(perfluorobutoxy)ethoxy)acetyl fluoride (CAS 172897-75-5)
- 2-Chloro-N-[3-(4-methoxy-benzoyl)-4,5,6,7-tetrahydro-benzo[b]thiophen-2-yl]-acetamide (CAS 919023-03-3)
- 4-Hydroxy-2-iodobenzonitrile (CAS 1243386-89-1)
- Insulin Glulisine (CAS 207748-29-6)
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