3-((4-Chloro-2-phosphonophenyl)diazenyl)-4,5-dihydroxynaphthalene-2,7-disulfonic acid CAS 1938-82-5
| CAS No. | 1938-82-5 |
| Molecular Formula | C16H12ClN2O11PS2 |
| Molecular Weight | 538.83 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a flavonoid core, an amide group, a sulfone group, a phosphate ester group, a hydroxyl group, an ether linkage, chlorine substitution, 3-((4-Chloro-2-phosphonophenyl)diazenyl)-4,5-dihydroxynaphthalene-2,7-disulfonic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 538.83 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
3-((4-Chloro-2-phosphonophenyl)diazenyl)-4,5-dihydroxynaphthalene-2,7-disulfonic acid (CAS 1938-82-5), molecular formula C16H12ClN2O11PS2 and molecular weight 538.83 g/mol, is a CATO reference standard with documented purity and traceability.
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), 3-((4-Chloro-2-phosphonophenyl)diazenyl)-4,5-dihydroxynaphthalene-2,7-disulfonic 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.
Physical & Chemical Properties
| Molecular Formula | C16H12ClN2O11PS2 |
| Molecular Weight | 538.83 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
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- Methyl 2-(2-amino-4-(trifluoromethyl)phenyl)acetate (CAS 13544-08-6)
- 4-Methyl-6-phenyl-2H-pyran-2-one (CAS 4467-30-5)
- 7-Iodo-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (CAS 228728-13-0)
- cis-3-Hepten-1-ol (CAS 1708-81-2)
- Semaglutide impurity 54 (CAS CATO-C4X-222654)
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