4-Hydroxy-3,5-diiodobenzenesulfonic acid CAS 554-71-2
| CAS No. | 554-71-2 |
| Molecular Formula | C6H4I2O4S |
| Molecular Weight | 425.97 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.
CATO supplies 4-Hydroxy-3,5-diiodobenzenesulfonic acid (CAS 554-71-2), a certified reference material (molecular formula C6H4I2O4S, MW 425.97 g/mol) for analytical method development and quality control.
Structurally, 4-Hydroxy-3,5-diiodobenzenesulfonic acid (C6H4I2O4S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, iodine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 425.97 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
As a certified reference material (CRM), 4-Hydroxy-3,5-diiodobenzenesulfonic 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 | C6H4I2O4S |
| Molecular Weight | 425.97 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; 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.) | 1957 |
| Halogen Content | I-containing |
| Sulfur Atoms | 1 |
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Recommended Standards
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- 1-(Benzo[d]oxazol-6-yl)-3-(4-chlorophenyl)thiourea (CAS 860785-10-0)
- 5-(Methylamino)-2-(3-(trifluoromethyl)phenyl)pyridazin-3(2H)-one (CAS 66165-45-5)
- Dapagliflozin Impurity 181 (CAS CATO-C4X-1138181)
- 4-Bromo-3-isopropyl-1,1'-biphenyl (CAS 1443327-12-5)
- 4-Amino-6-methoxypyridin-2(1H)-one (CAS 1356109-12-0)
- 4-(5-(3-Nitrophenyl)-3-(p-tolyl)-4,5-dihydro-1H-pyrazol-1-yl)-4-oxobutanoic acid (CAS 332390-96-2)
- Semaglutide Impurity 18 (CAS 1671100-14-3)
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