3,6-Bis((E)-(5-chloro-2-hydroxy-3-sulfophenyl)diazenyl)-4,5-dihydroxynaphthalene-2,7-disulfonic acid CAS 2103-73-3
| CAS No. | 2103-73-3 |
| Molecular Formula | C22H14Cl2N4O16S4 |
| Molecular Weight | 789.53 g/mol |
| 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 3,6-Bis((E)-(5-chloro-2-hydroxy-3-sulfophenyl)diazenyl)-4,5-dihydroxynaphthalene-2,7-disulfonic acid.
3,6-Bis((E)-(5-chloro-2-hydroxy-3-sulfophenyl)diazenyl)-4,5-dihydroxynaphthalene-2,7-disulfonic acid (CAS 2103-73-3), molecular formula C22H14Cl2N4O16S4 and molecular weight 789.53 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 3,6-Bis((E)-(5-chloro-2-hydroxy-3-sulfophenyl)diazenyl)-4,5-dihydroxynaphthalene-2,7-disulfonic acid (C22H14Cl2N4O16S4) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 3,6-Bis((E)-(5-chloro-2-hydroxy-3-sulfophenyl)diazenyl)-4,5-dihydroxynaphthalene-2,7-disulfonic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C22H14Cl2N4O16S4 |
| Molecular Weight | 789.53 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) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 4 |
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Why CATO?
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