3,7-Dibromo-2H-chromen-2-one CAS 1220702-33-9
| CAS No. | 1220702-33-9 |
| Molecular Formula | C9H4Br2O2 |
| Molecular Weight | 303.93 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 3,7-Dibromo-2H-chromen-2-one.
CATO supplies 3,7-Dibromo-2H-chromen-2-one (CAS 1220702-33-9), a certified reference material (molecular formula C9H4Br2O2, MW 303.93 g/mol) for analytical method development and quality control.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system, 3,7-Dibromo-2H-chromen-2-one is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 303.93 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).
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), 3,7-Dibromo-2H-chromen-2-one 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 | C9H4Br2O2 |
| Molecular Weight | 303.93 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; 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.) | 1990 |
| Halogen Content | Br-containing |
Related Dibromo Standards
- 3,6-Dibromo-4H-chromen-4-one (CAS 115237-39-3)
- 3,7-Dibromo-4H-chromen-4-one (CAS 1159978-70-7)
- 4,5-Dibromo-3-fluorothiophene-2-carboxylic acid (CAS 1628447-64-2)
- 2,2-Dibromo-1H-indene-1,3(2H)-dione (CAS 1685-97-8)
- 3,6-Dibromo-2H-chromen-2-one (CAS 58309-97-0)
- 6,8-Dibromo-2H-chromen-2-one (CAS 21524-15-2)
- 4,7-Dibromo-1H-pyrrolo[3,2-c]pyridine-3-carbaldehyde (CAS 1000341-95-6)
- 6,8-Dibromo-3,4-dihydroquinazolin-4-one (CAS 17518-85-3)
Recommended Standards
- Dimethyl 2,3-dibromosuccinate (CAS 1186-98-7)
- 2,5-Dibromohexanedioic Acid (CAS 3479-85-4)
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- 3,4,5,6-Tetrachlorophthalic acid hydrate(2:1) (CAS 58086-90-1)
- Lumogallion (CAS 4386-25-8)
- 308796-29-4 4-Ethoxybenzylzinc chloride, 0.5M in tetrahydrofuran MFCD01863643 (CAS 308796-29-4)
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- [3-(trifluoromethyl)cyclohexyl]methanamine, mixture of diastereomers (CAS 832753-69-2)
- 2-(2-Iodo-4,5-dimethoxyphenyl)acetic acid (CAS 35323-09-2)
- Fulvestrant impurity 44 (CAS CATO-C4X-191744)
- 1-(3-Methyl-1-benzothiophen-2-yl)ethan-1-amine hydrochloride (CAS 1171409-13-4)
- 7-Phenyl-2-(trifluoromethyl)pyrazolo[1,5-a]pyrimidine-5-carboxylic acid (CAS 1245808-60-9)
- Methyl 3-formyl-4,5-dimethyl-1H-pyrrole-2-carboxylate (CAS 33317-04-3)
- Semaglutide impurity 38 (CAS CATO-C4X-222638)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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