4-Amino-2,3-difluorophenol CAS 163733-99-1
| CAS No. | 163733-99-1 |
| Molecular Formula | C6H5F2NO |
| Molecular Weight | 145.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Amino-2,3-difluorophenol (CAS 163733-99-1), molecular formula C6H5F2NO and molecular weight 145.11 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system, 4-Amino-2,3-difluorophenol is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 145.11 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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), 4-Amino-2,3-difluorophenol 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 | C6H5F2NO |
| Molecular Weight | 145.11 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2003 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related Amino Standards
- 3-Amino-2,6-difluorophenol (CAS 113512-69-9)
- 5-Amino-2,4-difluorophenol (CAS 113512-71-3)
- 6-Amino-2,3-difluorophenol (CAS 115551-33-2)
- 4-Amino-2,5-difluorophenol (CAS 120103-19-7)
- 4-Amino-2,6-difluorophenol (CAS 126058-97-7)
- 2-Amino-4,6-difluorophenol (CAS 133788-83-7)
- 4-Amino-3,5-difluorophenol (CAS 135086-76-9)
- 2-Amino-3,6-difluorophenol (CAS 139548-98-4)
Recommended Standards
- 2-Amino-3,5-difluorophenol (CAS 163733-98-0)
- 2-Amino-4,5-difluorophenol (CAS 163734-01-8)
- (2R,4R)-(+)-Azetidine-2,4-dicarboxylic Acid (CAS 161596-63-0)
- 4,6-Difluoro-N-methylpyrimidin-2-amine (CAS 165258-57-1)
- 4-Methoxy-2-morpholinoaniline (CAS 144187-56-4)
- 4-Methyl-2-(piperidin-4-yl)-6-(trifluoromethyl)pyrimidine hydrochloride (CAS 1361111-69-4)
- 1-((4-Ethoxypyridin-3-yl)sulfonyl)piperazine (CAS 1352514-58-9)
- 1-(4-Nitro-2-(trifluoromethyl)phenyl)-1H-imidazole (CAS 351324-52-2)
- 2-(Propane-1-sulfonyl)benzoic acid (CAS 1016687-98-1)
- (E)-3-(Tributylstannyl)-2-buten-1-ol (CAS 124607-17-6)
- N-(3-bromo-4-methoxybenzyl)aniline (CAS 67342-73-8)
- 5'-Methyl-4,6-diphenyl-2H-[1,2'-bipyridin]-2-one (CAS 62219-19-6)
- 2-(Ethylthio)-1-(naphthalen-2-ylsulfonyl)-4,5-dihydro-1H-imidazole (CAS 868216-56-2)
- Peptide 441 (CAS CATO-CPTD788441)
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