1,3-Dichloro-5-methylisoquinoline CAS 21902-40-9
| CAS No. | 21902-40-9 |
| Molecular Formula | C10H7Cl2N |
| Molecular Weight | 212.08 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C10H7Cl2N, 1,3-Dichloro-5-methylisoquinoline contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 212.08 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
1,3-Dichloro-5-methylisoquinoline (CAS 21902-40-9), molecular formula C10H7Cl2N and molecular weight 212.08 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 | C10H7Cl2N |
| Molecular Weight | 212.08 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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.) | 1963 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Dichloro Standards
- 2,4-Dichloro-6-methylquinoline (CAS 102878-18-2)
- 2,4-Dichloro-7-methylquinoline (CAS 102878-19-3)
- 2,4-Dichloro-8-methylquinoline (CAS 102878-20-6)
- 2,8-Dichloro-6-methylquinoline (CAS 1195523-25-1)
- 2,7-Dichloro-8-methylquinoline (CAS 1215205-97-2)
- 2,7-Dichloro-3-methylquinoline (CAS 132118-46-8)
- 2,8-Dichloro-3-methylquinoline (CAS 1339432-40-4)
- 2,5-Dichloro-8-methylquinoline (CAS 1340414-32-5)
Recommended Standards
- 1-(Dichloromethyl)isoquinoline (CAS 88237-16-5)
- 1,3-Dichloro-7-methylisoquinoline (CAS 21902-37-4)
- 1-(2,4-Dichlorophenyl)cyclopropanecarbonitrile (CAS 71463-55-3)
- 1,3-Dichloro-8-methylisoquinoline (CAS 21902-39-6)
- 1-(3-Bromo-2-(trifluoromethyl)-phenyl)-3,3-difluoroazetidine 1779122-74-5 (CAS 1779122-74-5)
- Decursinol (CAS 23458-02-8)
- 4-Chloro-N-[(naphthalen-1-yl)methyl]-2-nitrobenzene-1-sulfonamide (CAS 1022360-31-1)
- Ethyl 4-dodecanamidobenzoate (CAS 62443-29-2)
- 3-Iodo-4-isobutoxybenzoic acid (CAS 1131614-19-1)
- N-(5-(5-Bromothiophen-2-yl)-1,3,4-oxadiazol-2-yl)-5-methylisoxazole-3-carboxamide (CAS 1021132-07-9)
- 2-Bromo-5-methylbenzo[b]thiophene (CAS 111860-00-5)
- 1-(1-Acetylindolin-6-yl)-3-(2-methoxyethyl)urea (CAS 1207005-47-7)
- N-Formyl-di-(1-isopropylphenyl)amine (N-Formyl DPIA) (CAS 71685-26-2)
- Acetyl-Tau Peptide (244-274) (Repeat 1 Domain) trifluoroacetate salt (CAS 2022956-56-3)
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