Arsenazo-I Trisodium Hydrate CAS 3547-38-4
| CAS No. | 3547-38-4 |
| Molecular Formula | C16H11AsN2O11S2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 569.30 g/mol gives Arsenazo-I Trisodium Hydrate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Arsenazo-I Trisodium Hydrate (CAS 3547-38-4), molecular formula C16H11AsN2O11S2Na and molecular weight 569.30 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C16H11AsN2O11S2Na, Arsenazo-I Trisodium Hydrate contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 569.30 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), Arsenazo-I Trisodium Hydrate 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 | C16H11AsN2O11S2 2*Na |
| Molecular Weight | 569.30 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 |
| Degree of Unsaturation (DBE) | 12.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
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