5-Iodouracil CAS 696-07-1
| CAS No. | 696-07-1 |
| Molecular Formula | C4H3IN2O2 |
| Molecular Weight | 237.98 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 5-Iodouracil (C4H3IN2O2) is characterized by an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, iodine 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
5-Iodouracil (CAS 696-07-1), molecular formula C4H3IN2O2 and molecular weight 237.98 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C4H3IN2O2 |
| Molecular Weight | 237.98 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | I-containing |
| Nitrogen Atoms | 2 |
Related Iodouracil Standards
Recommended Standards
- 4-Iodopyrazole-3-carboxylic Acid (CAS 6647-93-4)
- 1-Bromo-2,3-difluoro-4-nitrobenzene (CAS 1003708-24-4)
- 3-Iodo-1H-pyrazole-4-carboxylic acid (CAS 2384763-04-4)
- 3-Bromo-2,4-difluoronitrobenzene, 97% (CAS 103977-78-2)
- (2,3-Dihydro-[1,4]dioxino[2,3-c]pyridin-7-yl)methanol (CAS 443955-89-3)
- 1,6-dimethyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indazole (CAS 1463055-05-1)
- (4-(Bromomethyl)phenyl)(cyclopropyl)methanone (CAS 35981-66-9)
- 4-(Butylamino)-3-nitrobenzoic acid (CAS 120321-65-5)
- (R)-5-Ethyldihydrofuran-2(3H)-one (CAS 63357-95-9)
- 4-({6-[2-(1-methylpiperidin-4-ylidene)hydrazin-1-yl]pyridin-3-yl}sulfonyl)morpholine (CAS 1707392-11-7)
- 3-(Diethylamino)propane-1,2-diol (CAS 621-56-7)
- N-(3-Chloro-4-methylphenyl)-5-methylisoxazole-4-carboxamide (CAS 61643-43-4)
- 7-methyl-7H-pyrrolo[2,3-d]pyrimidine-5-carbaldehyde (CAS 1501213-61-1)
- Semaglutide impurity 215 (CAS CATO-C4X-2226215)
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