3,3'-Dihydroxy-1H,1'H-[2,2'-biindole]-5,5'-disulfonic acid CAS 28286-71-7
| CAS No. | 28286-71-7 |
| Molecular Formula | C16H12N2O8S2 |
| Molecular Weight | 424.41 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 3,3'-Dihydroxy-1H,1'H-[2,2'-biindole]-5,5'-disulfonic acid 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.
CATO supplies 3,3'-Dihydroxy-1H,1'H-[2,2'-biindole]-5,5'-disulfonic acid (CAS 28286-71-7), a certified reference material (molecular formula C16H12N2O8S2, MW 424.41 g/mol) for analytical method development and quality control.
3,3'-Dihydroxy-1H,1'H-[2,2'-biindole]-5,5'-disulfonic acid (C16H12N2O8S2) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C16H12N2O8S2 |
| Molecular Weight | 424.41 g/mol |
| 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 |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1965 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Dihydroxy Standards
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- 1,5-Dihydroxy-4,8-bis(phenylamino)anthracene-9,10-dione (CAS 25632-28-4)
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- (3α,5 β,7α)-3,7-Dihydroxy-12-oxocholan-24-oic Acid Methyl Ester (CAS 10538-64-4)
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- 1,8-Dihydroxy-4-((4-hydroxyphenethyl)amino)-5-nitroanthracene-9,10-dione (CAS 15791-78-3)
Recommended Standards
- (2R,3S,4R,5R)-2-(Hydroxymethyl)-5-(6-(methylamino)-2-(4-(pyridin-2-yl)-1H-pyrazol-1-yl)-9H-purin-9-yl)tetrahydrofuran-3,4-diol (CAS 765299-61-4)
- 3-{[(4-chlorophenyl)methyl]sulfanyl}-5-({[(4-chlorophenyl)methyl]sulfanyl}methyl)-4-ethyl-4H-1,2,4-triazole (CAS 344268-69-5)
- Methyl 5-{[3-(methoxycarbonyl)-4-nitrophenyl]disulfanyl}-2-nitrobenzoate (CAS 115215-73-1)
- Ethyl 2-((4-fluorobenzyl)(4-(trifluoromethyl)phenyl)amino)thiazole-4-carboxylate (CAS 860783-96-6)
- 1-azido-3-methylbenzene (CAS 4113-72-8)
- (S)-3-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenoxy)pyrrolidine hydrochloride (CAS 2114341-27-2)
- Potassium 2-(2-butyl-1h-1,3-benzodiazol-1-yl)acetate (CAS 1007192-04-2)
- Pentadecanoic-15,15,15-d3 Acid (CAS 352431-40-4)
- 4-(Trifluoromethyl)-1H-pyrazole-3-carboxylic acid (CAS 716362-12-8)
- 4-(piperidin-4-yl)-4H-1,2,4-triazol-3-amine dihydrochloride (CAS 1803571-60-9)
- 2-(2-(Pyridin-4-ylmethoxy)phenyl)acetic acid (CAS 1521945-79-8)
- 3-Ethyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (CAS 2096342-34-4)
- Oclacitinib impurity 1 (CAS CATO-C4X-30181)
- Semaglutide impurity 39 (CAS CATO-C4X-222639)
Why CATO?
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