3,6-Difluorophthalic anhydride 4,7-DIFLUORO-1,3-ISOBENZOFURANDIONE 4,7-DIFLUOROISOBENZOFURAN-1,3-DIONE 652-40-4 AS02020 CAS 652-40-4
| CAS No. | 652-40-4 |
| Molecular Formula | C8H8F2O3 |
| Molecular Weight | 190.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system, 3,6-Difluorophthalic anhydride 4,7-DIFLUORO-1,3-ISOBENZOFURANDIONE 4,7-DIFLUOROISOBENZOFURAN-1,3-DIONE 652-40-4 AS02020 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 190.14 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).
CATO supplies 3,6-Difluorophthalic anhydride 4,7-DIFLUORO-1,3-ISOBENZOFURANDIONE 4,7-DIFLUOROISOBENZOFURAN-1,3-DIONE 652-40-4 AS02020 (CAS 652-40-4), a certified reference material (molecular formula C8H8F2O3, MW 190.14 g/mol) for analytical method development and quality control.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C8H8F2O3 |
| Molecular Weight | 190.14 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | F-containing |
Related Difluorophthalic Standards
Recommended Standards
- Cyclopropyl trifluoromethanesulfonate (CAS 25354-42-1)
- 5-formyl-1-benzofuran-2-carboxylic acid (CAS 10035-38-8)
- Allyl trifluoromethanesulfonate (CAS 41029-45-2)
- 1-(difluoromethyl)-5-methyl-1h-pyraZole-3-carbohydrazide (CAS 1004644-24-9)
- 4-(Difluoromethyl)-6-fluoro-1H-indole-2-carboxylic acid (CAS 2168346-57-2)
- H-Arg-OEt·2 HCl (CAS 36589-29-4)
- (1-methyl-2-oxabicyclo[2.1.1]hexan-4-yl)methanol (CAS 2138162-49-7)
- cis-2-(3,5-Dimethylbenzoyl)cyclohexane-1-carboxylic acid (CAS 733742-69-3)
- 4-((2-Chloro-5-nitrobenzylidene)amino)-3-(2-fluorophenyl)-1H-1,2,4-triazole-5(4H)-thione (CAS 578749-48-1)
- Ethyl 3-oxoquinuclidine-2-carboxylate (CAS 34286-16-3)
- 3-Morpholinotetrahydro-2H-pyran-4-amine (CAS 1174218-58-6)
- 2,4-Diaminophenol sulfate (CAS 74283-34-4)
- 1,3-Benzenedicarboxylic acid, polymer with 1,2-ethanediol, 2,5-furandione and 2,2'-oxybis[ethanol] (CAS 26795-76-6)
- Myristoyl Pentapeptide -4 acetate (CAS 959610-30-1(free base))
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