5-bromo-3-methyl-3H-isobenzofuran-1-one CAS 1374574-45-4
| CAS No. | 1374574-45-4 |
| Molecular Formula | C9H13BrO2 |
| Molecular Weight | 233.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-bromo-3-methyl-3H-isobenzofuran-1-one (CAS 1374574-45-4), molecular formula C9H13BrO2 and molecular weight 233.10 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 5-bromo-3-methyl-3H-isobenzofuran-1-one (C9H13BrO2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 233.10 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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), 5-bromo-3-methyl-3H-isobenzofuran-1-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 | C9H13BrO2 |
| Molecular Weight | 233.10 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Br-containing |
Related bromo Standards
- 2-Bromo-7-vinylnaphthalene (CAS 1219691-16-3)
- 2-Bromo-3-(cyclohexyloxy)acrylaldehyde (CAS 1253298-70-2)
- 5-bromo-4-methyl-1,3-dihydro-2-benzofuran-1-one (CAS 1255206-67-7)
- Ethyl 4-Bromo-3-cyclohexenecarboxylate (CAS 1365272-96-3)
- 5-bromo-3,4-dihydro-2H-1-benzopyran-2-one (CAS 1637490-76-6)
- 7-bromo-3,4-dihydro-1H-2-benzopyran-4-one (CAS 168759-64-6)
- 3-Bromo-2-hydroxy-4,4,5,5-tetramethylcyclopent-2-en-1-one (CAS 1889-99-2)
- 1-Bromo-4-methoxybicyclo[2.2.2]octan-2-one (CAS 88888-28-2)
Recommended Standards
- Methyl4-bromobicyclo[2.2.1]heptane-1-carboxylate (CAS 15448-84-7)
- 5-bromobenzofuran-7-carbaldehyde (CAS 170681-94-4)
- 3,6-Dichloro-4-(piperazin-1-yl)pyridazine (CAS 1143575-88-5)
- Methyl 2-bromobicyclo[2.2.1]heptane-1-carboxylate (CAS 102450-73-7)
- 2-Methylbenzo[d]thiazole-5-sulfonyl chloride (CAS 21431-12-9)
- 1-(4-Methoxy-6-methyl-5,6,7,8-tetrahydro-[1,3]dioxolo[4,5-g]isoquinolin-9-yl)ethan-1-one (CAS 854844-21-6)
- 3-Amino-n-[2-(dimethylamino)ethyl]-1h-pyrazole-5-carboxamide (CAS 1347088-26-9)
- Ethynyl Estradiol 17-Acetate (CAS 21221-29-4)
- Ruxolitinib Impurity 67 (CAS CATO-C4X-205867)
- 4-(3-Bromophenyl)tetrahydro-2H-pyran-4-amine hydrochloride (CAS 1209242-66-9)
- 1-(Benzyloxy)-4-bromonaphthalene (CAS 138865-41-5)
- 3-(Furan-2-yl)imidazo[1,5-a]pyridine-1-carbaldehyde (CAS 690642-31-0)
- Ipragliflozin Impurity 17 (CAS CATO-C4X-188517)
- Fas C- Terminal Tripeptide (CAS 189109-90-8)
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