21811-74-5 Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, ar-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-3',6'-dihydroxy-, monohydrochloride Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 5-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-3',6'-dihydroxy-, hydrochloride (1:1) Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 5-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-3',6'-dihydroxy-, monohydrochloride 5-((4,6-Dichlorotriazin-2-yl)amino)fluorescein hydrochloride CAS 21811-74-5
| CAS No. | 21811-74-5 |
| Molecular Formula | C23H36Cl2N4O5 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, 21811-74-5 Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, ar-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-3',6'-dihydroxy-, monohydrochloride Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 5-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-3',6'-dihydroxy-, hydrochloride (1:1) Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 5-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-3',6'-dihydroxy-, monohydrochloride 5-((4,6-Dichlorotriazin-2-yl)amino)fluorescein hydrochloride is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 555.92 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.
CATO supplies 21811-74-5 Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, ar-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-3',6'-dihydroxy-, monohydrochloride Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 5-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-3',6'-dihydroxy-, hydrochloride (1:1) Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 5-((4,6-dichloro-1,3,5-triazin-2-yl)amino)-3',6'-dihydroxy-, monohydrochloride 5-((4,6-Dichlorotriazin-2-yl)amino)fluorescein hydrochloride (CAS 21811-74-5), a certified reference material (molecular formula C23H36Cl2N4O5HCl, MW 555.92 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 | C23H36Cl2N4O5 HCl |
| Molecular Weight | 555.92 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
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