4,5-Bis(1,3,2-dithiarsolan-2-yl)-3,6-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9-[9H]xanthene]-5-carboxylic acid CAS 439791-28-3
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 439791-28-3 |
| Molecular Formula | C25H18As2O7S4 |
| Molecular Weight | 708.51 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,5-Bis(1,3,2-dithiarsolan-2-yl)-3,6-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9-[9H]xanthene]-5-carboxylic acid (CAS 439791-28-3) is a high-purity pharmaceutical standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C25H18As2O7S4. Molecular weight: 708.51 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C25H18As2O7S4 |
| Molecular Weight | 708.51 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| 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) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Sulfur Atoms | 4 |
Related Bis Standards
- 4,5-Bis(1,3,2-dithiarsolan-2-yl)-3,6-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9-[9H]xanthene]-6-carboxylic Acid (CAS 1042084-20-7)
- 4,5-Bis(1,3,2-dithiarsolan-2-yl)-2,7-difluoro-3,6-dihydroxyspiro[isobenzofuran-1(3H),9-[9H]xanthen]-3-one (CAS 912934-89-5)
- 4,5-Bis(1,3,2-dithiarsolan-2-yl)-9-(4-fluorophenyl)-6-hydroxy-3H-xanthen-3-one (CAS 1378318-62-7)
- 5-(1,3,2-Dithiarsolan-2-yl)-2-[3-[5-(1,3,2-dithiarsolan-2-yl)-1,3-dihydro-3,3-dimethyl-1-(4-sulfobutyl)-2H-indol-2-ylidene]-1-propen-1-yl]-3,3-dimethyl-1-(4-sulfobutyl)-3H-indolium Inner Salt 946135-47-3 AsCy3 Bis(dithiarsolanyl)-bis(sulfobutyl) Cyanine 3 (CAS 946135-47-3)
- 4-[1,3,2]Dithiarsolan-2-yl-phenylamine (CAS 5577-20-8)
Recommended Standards
- 12,12,13,13,14,14,15,15,16,16,17,17,17-Tridecafluoroheptadecyl dimorpholinophosphinate (CAS 134051-91-5)
- Dichloro[9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene]Cobalt(II) (CAS 898807-69-7)
- Tenofovir Impurity 60 (CAS 1428470-49-8)
- 2-Amino-5-(ethylsulfonyl)-4-(4-nitrophenyl)thiophene-3-carbonitrile (CAS 1707605-55-7)
- 5-Chloro-2-cyclopropoxybenzoic acid (CAS 959749-03-2)
- (1-Methyl-1H-pyrrolo[2,3-b]pyridin-4-yl)methanamine (CAS 1638768-08-7)
- Revefenacin impurity 97 (CAS 774238-89-0)
- 1-Phenylhex-1-yn-3-one (CAS 14252-32-5)
- 3-Isopropyl-N'-(thiophen-2-ylmethylene)-1H-pyrazole-5-carbohydrazide (CAS 303108-05-6)
- Semaglutide impurity 59 (CAS CATO-C4X-222659)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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