5,7-Diiodo-2,3-dihydrothieno[3,4-b][1,4]dioxine CAS 640737-72-0
| CAS No. | 640737-72-0 |
| Molecular Formula | C6H4I2O2S |
| Molecular Weight | 393.97 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
5,7-Diiodo-2,3-dihydrothieno[3,4-b][1,4]dioxine (CAS 640737-72-0), molecular formula C6H4I2O2S and molecular weight 393.97 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, iodine substitution, an aromatic ring system, 5,7-Diiodo-2,3-dihydrothieno[3,4-b][1,4]dioxine is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 393.97 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
CATO manufactures 5,7-Diiodo-2,3-dihydrothieno[3,4-b][1,4]dioxine 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 | C6H4I2O2S |
| Molecular Weight | 393.97 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | I-containing |
| Sulfur Atoms | 1 |
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