3-Bromo-1-methylnaphthalene CAS 112929-89-2
| CAS No. | 112929-89-2 |
| Molecular Formula | C11H9Br |
| Molecular Weight | 221.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Bromo-1-methylnaphthalene (CAS 112929-89-2), molecular formula C11H9Br and molecular weight 221.09 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to bromine substitution, an aromatic ring system, 3-Bromo-1-methylnaphthalene is typically off-white to pale yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 221.09 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 | C11H9Br |
| Molecular Weight | 221.09 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Halogen Content | Br-containing |
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Recommended Standards
- 2,3,6-Trifluoro-5-nitrobenzoic acid (CAS 114151-54-1)
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- Ethyl (Z)-2-bromohex-2-enoate (CAS 102575-02-0)
- (Z)-Ethyl 2-bromo-4-methylpent-2-enoate (CAS 102575-01-9)
- Ethyl 2-(1,2,3,4-tetrahydroquinolin-2-yl)acetate (CAS 5100-58-3)
- tert-Butyl methyl(pyrrolidin-3-yl)carbamate (CAS 172478-00-1)
- 5-methyl-5H,6H,7H,8H-imidazo[1,2-a]pyridine-3-carboxylic acid hydrochloride (CAS 1955539-69-1)
- 4-(tert-Butyl)-6-fluoropicolinaldehyde (CAS 1289000-84-5)
- (2R,5R)-2-(tert-Butyl)-5-methyl-1,3-dioxolan-4-one (CAS 104194-02-7)
- Methyl 4,6-dibromo-3-hydroxypicolinate (CAS 321596-55-8)
- 1-Benzyl-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid ethyl ester (CAS 53977-02-9)
- (R)-1-((S)-1-phenylethyl)azetidine-2-carboxylic acid (CAS 204274-32-8)
- 4-Fluoro-N-methyl-N-phenylbenzamide (CAS 37950-87-1)
- Peptide Impurity 11 X TFA Salt (CAS CATO-CPTD788811)
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