4-Sulfophthalic Acid Trisodium Salt CAS 3325-08-4
| CAS No. | 3325-08-4 |
| Molecular Formula | C8H3O7S |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-Sulfophthalic Acid Trisodium Salt is closely related to a carbohydrate-derived structure, a sulfone group in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
4-Sulfophthalic Acid Trisodium Salt (CAS 3325-08-4), molecular formula C8H3O7SNa and molecular weight 266.16 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C8H3O7SNa, 4-Sulfophthalic Acid Trisodium Salt contains a carbohydrate-derived structure, a sulfone group; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 266.16 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), 4-Sulfophthalic Acid Trisodium Salt 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.
Physical & Chemical Properties
| Molecular Formula | C8H3O7S 3*Na |
| Molecular Weight | 266.16 g/mol |
| Purity | 97%+ |
| 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) | 7.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 1 |
Related Sulfophthalic Standards
Recommended Standards
- 6-Methoxyphthalazin-1-ol (CAS 60889-21-6)
- 1-Bromo-5-chloro-4-fluoro-2-nitrobenzene (CAS 960000-99-1)
- 2-(Methoxycarbonyl)-6-(trifluoromethyl)isonicotinic acid (CAS 1393546-30-9)
- tert-Butyl 3-(aminomethyl)morpholine-4-carboxylate hydrochloride (CAS 1802489-65-1)
- 4-Chloro-2-(difluoromethyl)-6-methyl-3-(trifluoromethyl)pyridine (CAS 1804490-91-2)
- Prucalopride Succinate Impurity 45 (CAS 1352965-19-5)
- Methyl 3-((trifluoromethyl)thio)benzoate (CAS 88489-59-2)
- (2E)-3-(3-Chloro-4-methoxyphenyl)-2-[(E)-2-chlorobenzoyl]prop-2-enenitrile (CAS 861207-91-2)
- Methyl 4-(5-nitropyridin-2-yl)butanoate (CAS 1398048-72-0)
- Retatrutide (CAS 2381089-83-2)
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