Bis(4-methoxyphenyl)phosphinic acid CAS 20434-05-3
| CAS No. | 20434-05-3 |
| Molecular Formula | C14H15O4P |
| Molecular Weight | 278.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Bis(4-methoxyphenyl)phosphinic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
CATO supplies Bis(4-methoxyphenyl)phosphinic acid (CAS 20434-05-3), a certified reference material (molecular formula C14H15O4P, MW 278.24 g/mol) for analytical method development and quality control.
Bis(4-methoxyphenyl)phosphinic acid (C14H15O4P) contains a phosphate ester group, a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system. It is notably hygroscopic, 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 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C14H15O4P |
| Molecular Weight | 278.24 g/mol |
| Appearance | Off-white to pale 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
Related Bis Standards
- 2-[4-(2-methoxyphenyl)-4-methyl-2,5-dioxoimidazolidin-1-yl]acetic acid (CAS 1152641-90-1)
- 3-(1-(4-Methoxyphenyl)-2,5-dioxoimidazolidin-4-yl)propanoic acid (CAS 1173293-42-9)
- (E)-4-(2-(2-(4-methoxyphenyl)acetyl)hydrazinyl)-4-oxobut-2-enoic acid (CAS 314765-36-1)
- 2-[4-(4-methoxyphenyl)-4-methyl-2,5-dioxoimidazolidin-1-yl]acetic acid (CAS 956742-88-4)
- 1-((2-Methoxyphenyl)carbamoyl)piperidine-3-carboxylic acid (CAS 923153-65-5)
- 2-[(3-Methoxyphenyl)methylene]-propanedioic Acid 1,3-Diethyl Ester (CAS 6771-54-6)
- 3-[4-(4-Methoxyphenyl)-1-piperazinyl]-3-oxopropanoic acid (CAS 896521-67-8)
- Methyl ((1-(4-methoxyphenyl)-5-oxopyrrolidin-3-yl)methyl)carbamate (CAS 954681-24-4)
Recommended Standards
- 3-(2-Amino-phenylamino)-2-cyano-acrylic acid ethyl ester (CAS 21025-47-8)
- Bis(5-nitropyridin-2-yl)sulfane (CAS 2127-11-9)
- 2-(2,4-Dinitrophenylthio)pyrimidine (CAS 66474-53-1)
- Dimethyl 1-(2-fluorophenyl)-1H-pyrazole-3,4-dicarboxylate (CAS 618442-03-8)
- Ethyl Isobutyrate (CAS 97-62-1)
- 3-(Pyrimidin-2-yl)aniline (CAS 69491-56-1)
- 3-Amino-5-chloro-2,3-dihydro-1H-inden-1-one (CAS 1391203-81-8)
- Ethyl 7-cyclopropyl-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate (CAS 1245807-84-4)
- Vitamin K1 Impurity 67 (CAS 4444-14-8)
- Baloxavir Impurity 110 (CAS CATO-C4X-2108110)
- 2-Methyl-N-(2-(2-phenylpyrimidin-5-yl)ethyl)benzamide (CAS 2034343-21-8)
- 6,7-Dihydro-5H-indeno[5,6-d][1,3]dioxol-5-ol (CAS 119055-20-8)
- tert-Butyl 2-(4-(trifluoromethyl)-1H-pyrazol-1-yl)acetate (CAS 1402445-50-4)
- Semaglutide Impurity 161 (x TFA Salt) (CAS CATO-C4X-2226161)
Why CATO?
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