3,4,5,3,5,7,8-Heptamethoxyflavone CAS 21634-52-6
| CAS No. | 21634-52-6 |
| Molecular Formula | C8H8N2O2 |
| Molecular Weight | 164.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
3,4,5,3,5,7,8-Heptamethoxyflavone (CAS 21634-52-6) is a high-purity analytical reference standard with the molecular formula C8H8N2O2 and a molecular weight of 164.16 g/mol.
The molecular framework of 3,4,5,3,5,7,8-Heptamethoxyflavone (C8H8N2O2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. 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.
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.
Physical & Chemical Properties
| Molecular Formula | C8H8N2O2 |
| Molecular Weight | 164.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 2 |
Related Heptamethoxyflavone Standards
Recommended Standards
- 3-(Pyridin-4-yl)oxazolidin-2-one (CAS 488720-30-5)
- 3,4-Dimethoxypicolinonitrile (CAS 348635-43-8)
- 3-(Hydroxymethyl)benzofuran-6-ol (CAS 221905-18-6)
- 3,4-Dimethylpyrano[2,3-c]pyrazol-6(1H)-one (CAS 5203-98-5)
- (11bR)-N-[(S)-1-Phenylethyl]-dinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin-4-amine (CAS 556808-28-7)
- 2-Amino-5-bromo-3,6-dimethoxybenzaldehyde (CAS 252009-06-6)
- 2-Amino-5-[(2-methoxyphenyl)sulfamoyl]benzoic acid (CAS 519153-00-5)
- 8-Bromo-6-chloroquinolin-4-ol (CAS 1388060-25-0)
- (3,3,3-Trimethoxypropyl)benzene (CAS 54917-78-1)
- 3-aminotetrahydrofuran-3-carboxylic acid (CAS 125218-55-5)
- 6-Bromo-4-methoxypyridin-2-amine (CAS 1158786-59-4)
- 2,6-Dimethoxy-4-(2-oxooxazolidine-3-carbonyl)phenyl ethyl carbonate (CAS 50916-05-7)
- 5-Methoxy-2-methyl-4-nitrobenzo[d]thiazole (CAS 265312-58-1)
- Atrial Natriuretic Polypeptide (4-28), human (CAS 95896-08-5)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com