TETRAIODOPHTHALICANHYDRIDE CAS 632-80-4
| CAS No. | 632-80-4 |
| Molecular Formula | C8I4O3 |
| Molecular Weight | 651.70 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
TETRAIODOPHTHALICANHYDRIDE (CAS 632-80-4), molecular formula C8I4O3 and molecular weight 651.70 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of TETRAIODOPHTHALICANHYDRIDE (C8I4O3) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, iodine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C8I4O3 |
| Molecular Weight | 651.70 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | I-containing |
Recommended Standards
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- Linagliptin Impurity 88 (CAS 2489212-72-6)
- [5-(oxolan-3-yl)-4H-1,2,4-triazol-3-yl]methanamine dihydrochloride (CAS 1989671-50-2)
- Roxadustat-d5 (CAS 2043026-13-5)
- 7-Methoxy-1,2-dihydroisoquinolin-3(4H)-one (CAS 1023300-22-2)
- 2-(4-Aminophenyl)-1-(piperazin-1-yl)ethan-1-one (CAS 1593150-98-1)
- N1-(Benzo[d]thiazol-2-yl)-N2-(2,3-dimethylphenyl)oxalamide (CAS 920229-74-9)
- Peptide Impurity 70 TFA Salt (CAS CATO-CPTD788570)
Why CATO?
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