Potassium Phthalate Monobasic CAS 877-24-7
| CAS No. | 877-24-7 |
| Molecular Formula | C8H5O4 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| 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 Potassium Phthalate Monobasic.
Potassium Phthalate Monobasic (CAS 877-24-7) is a high-purity analytical reference standard with the molecular formula C8H5O4K and a molecular weight of 204.22 g/mol.
Potassium Phthalate Monobasic (C8H5O4K) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, 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.
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 | C8H5O4 K |
| Molecular Weight | 204.22 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 methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Potassium Standards
- Sodium phthalate(x:1) (CAS 10197-71-4)
- Sodium phthalate (CAS 15968-01-1)
- Calcium Phthalate (CAS 5793-85-1)
- Phthalate Solution (CAS CATO-CDGG-116810-01-1ml)
- Phthalate quality control sample in PVC (CAS CATO-CQCM100156)
- Phthalate ester quality control substance in acrylic resin paint coating (CAS CATO-CQCM100160)
- Phthalate Solution (CAS CATO-MCHM703181-HE)
- Phthalate Mix 7 (CAS CATO-MCHM703499)
Recommended Standards
- 2'-Bromo-[1,1'-biphenyl]-4-ol (CAS 70066-66-9)
- 3-Methyl-5-nitroisothiazole (CAS 36778-16-2)
- 1-(2-Fluorobenzamido)cyclohexane-1-carboxylic acid (CAS 912771-23-4)
- 3-(dodecyloxy)propanenitrile (CAS 56637-94-6)
- 2-[3-chloro-4-(difluoromethoxy)-5-ethoxyphenyl]acetonitrile (CAS 1197699-95-8)
- 2-(2-Methoxyethyl)-1-methylpiperidine (CAS 865075-21-4)
- 2-(4-Aminopiperidin-1-yl)-N-(1-hydroxypropan-2-yl)acetamide (CAS 1525058-57-4)
- 6-(3-Bromophenyl)-3-(piperidin-4-yl)-[1,2,4]triazolo[4,3-b]pyridazine (CAS 1706458-91-4)
- 3,5-Dibromo-2-nitrothiophene (CAS 31845-01-9)
- Semaglutide impurity 25 (CAS CATO-C4X-222625)
Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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