Disodium 3-Hydroxy-2,7-naphthalenedisulfonate CAS 135-51-3
| CAS No. | 135-51-3 |
| Molecular Formula | C10H6O7S2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Disodium 3-Hydroxy-2,7-naphthalenedisulfonate (CAS 135-51-3), molecular formula C10H6O7S2Na and molecular weight 325.26 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Disodium 3-Hydroxy-2,7-naphthalenedisulfonate (C10H6O7S2Na) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 325.26 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).
As a certified reference material (CRM), Disodium 3-Hydroxy-2,7-naphthalenedisulfonate 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.
Physical & Chemical Properties
| Molecular Formula | C10H6O7S2 2*Na |
| Molecular Weight | 325.26 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Sulfur Atoms | 2 |
Related Disodium Standards
- Disodium hydrogen phosphate dihydrate (CAS 10028-24-7)
- Disodium terephthalate (CAS 10028-70-3)
- Disodium Deuterium Phosphate (CAS 107632-22-4)
- Disodium;2-ethoxyethyl phosphate (CAS 1229236-93-4)
- DIsodium phenyl phosphate hydrate (CAS 1260375-37-8)
- Disodium 4-cyanoisothiazole-3,5-dithiolate (CAS 1314229-65-6)
- MLN-4760 disodium salt (CAS 1315337-39-3)
- MLN-4760 disodium salt tetrahydrate (CAS 1315337-40-6)
Recommended Standards
- 5-Chloro-7-nitro-3,4-dihydro-2H-benzo[b][1,4]oxazine (CAS 2793433-49-3)
- ML-191 (CAS 931695-79-3)
- (E)-N-(3-chloro-4-fluorophenyl)-3-(3,4,5-trimethoxyphenyl)acrylamide (CAS 329778-43-0)
- 4-((2-Chlorophenyl)thio)-2,3-dihydro-4H-thieno[2,3-b]thiopyran 1,1-dioxide (CAS 339019-26-0)
- 2-Hydroxy-2-(3-methylthiophen-2-yl)acetic acid (CAS 1248481-32-4)
- H-D-Leu-NH2 · HCl (CAS 80970-09-8)
- 2,5-Dimethyl-1-(3-(methylthio)phenyl)-1h-pyrrole-3-carboxylic acid (CAS 923772-88-7)
- 1-(2,6-Dimethylmorpholino)-2-(piperidin-4-yl)ethan-1-one (CAS 1017025-35-2)
- 4-Bromo-3-iodobenzaldehyde (CAS 873387-81-6)
- Semaglutide impurity 62 (CAS CATO-C4X-222662)
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