4-Isopropylphenyl Diphenyl Phosphate CAS 55864-04-5
| CAS No. | 55864-04-5 |
| Molecular Formula | C21H21O4P |
| Molecular Weight | 368.36 g/mol |
| 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.
4-Isopropylphenyl Diphenyl Phosphate (CAS 55864-04-5), molecular formula C21H21O4P and molecular weight 368.36 g/mol, is a CATO reference standard with documented purity and traceability.
4-Isopropylphenyl Diphenyl Phosphate (C21H21O4P) contains a flavonoid core, a phosphate ester group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C21H21O4P |
| Molecular Weight | 368.36 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
Related Isopropylphenyl Standards
- 2-Isopropylphenyl Diphenyl Phosphate (CAS 64532-94-1)
- 5-(4-Isopropylphenyl)-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine-2-carbonyl chloride (CAS 865412-32-4)
- 5-(4-Isopropylphenyl)-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine-3-carbonyl chloride (CAS 865412-31-3)
- 5-(4-Isopropylphenyl)-7-(trifluoromethyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidine-2-carbohydrazide (CAS 832739-14-7)
- N-(4-isopropylphenyl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzamide (CAS 2171363-38-3)
- Ethyl 4-(4-isopropylphenyl)-6-oxo-2-phenyl-1,4,5,6-tetrahydropyrimidine-5-carboxylate (CAS 477867-17-7)
- N6-(4-Isopropylphenyl)-N2-(4-methoxyphenyl)-9H-purine-2,6-diamine (CAS 764646-19-7)
- 4-(4-Isopropylphenyl)-5-methyl-2-(3-(trifluoromethyl)benzyl)-2,4-dihydro-3H-1,2,4-triazol-3-one (CAS 860785-32-6)
Recommended Standards
- Fosaprepitant Impurity 48 (CAS 1707-92-2)
- Tricresyl Phosphate(mixture of isomers) (CAS 1330-78-5)
- Regorafenib Impurity 19 (CAS 2098799-12-1)
- 1,3,6-naphthalenetrisulfonic acid 86-66-8 CHEBI:32916 naphthalene-1,3,6-trisulfonic acid naphthalene-1,3,6-trisulphonic acid (CAS 86-66-8)
- Ethyl 3-hexyl-3-methyloxirane-2-carboxylate (CAS 37545-94-1)
- 1,2,3-Tri-tert-butylanthracene-9,10-dione (CAS 116655-11-9)
- 5,6-Dihydroisoquinoline (CAS 60498-99-9)
- (R,R)-Ph-Bisbox (CAS 148925-98-8)
- (3-Bromo-2-((3-methoxybenzyl)oxy)phenyl)boronic acid (CAS 849052-24-0)
- N-((6-Methyl-7-nitro-1,2,3,4-tetrahydroquinolin-2-yl)methyl)propan-2-amine methanesulfonate (CAS 22982-78-1)
- 5-(4-Butoxyphenyl)-1-(p-tolyl)-3-(p-tolylamino)-1,5-dihydro-2H-pyrrol-2-one (CAS 312518-02-8)
- 7-Chloro-5-(4-chlorobenzyl)-2,3-dihydrobenzo[b][1,4]thiazepin-4(5H)-one (CAS 341967-93-9)
- Peramivir impurity 138 (CAS CATO-C4X-1833138)
- Semaglutide Impurity 123 (CAS 71997-93-8)
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