4,4'-Diaminostilbene-2,2'-disulfonic Acid Disodium Salt CAS 7336-20-1
| CAS No. | 7336-20-1 |
| Molecular Formula | C14H12N2O6S2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 4,4'-Diaminostilbene-2,2'-disulfonic Acid Disodium Salt (C14H12N2O6S2Na) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 391.37 g/mol, it falls into the moderately-high-molecular-weight range. 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).
4,4'-Diaminostilbene-2,2'-disulfonic Acid Disodium Salt (CAS 7336-20-1) is a high-purity analytical reference standard with the molecular formula C14H12N2O6S2Na and a molecular weight of 391.37 g/mol.
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 | C14H12N2O6S2 2*Na |
| Molecular Weight | 391.37 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1959 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Diaminostilbene Standards
Recommended Standards
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- 4-Bromo-2,6-dimethylbiphenyl (CAS 958650-71-0)
- (3R,5S)-1-(tert-butoxycarbonyl)-5-methylpyrrolidine-3-carboxylic acid (CAS 2387562-37-8)
- Naphthalene-1,4-bis(carbothioamide) (CAS 1347815-21-7)
- 4-Ethoxy-1,2-benzisoxazol-3-amine (CAS 927802-17-3)
- 7-Bromo-4-chloropyrido[3,2-c]pyridazine (CAS 2759952-13-9)
- 5,7-Dimethylbenzofuran-2(3H)-one (CAS 58108-31-9)
- 2-Cyclopropyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine (CAS 880361-75-1)
- Semaglutide Impurity 9 (CAS CATO-C4X-22269)
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