Naphthalene-2,6-disulfonic acid CAS 581-75-9
| CAS No. | 581-75-9 |
| Molecular Formula | C12H16O2 |
| Molecular Weight | 192.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Naphthalene-2,6-disulfonic acid (CAS 581-75-9), a certified reference material (molecular formula C12H16O2, MW 192.25 g/mol) for analytical method development and quality control.
Based on its molecular formula C12H16O2, Naphthalene-2,6-disulfonic acid contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 192.25 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
As a certified reference material (CRM), Naphthalene-2,6-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.
Physical & Chemical Properties
| Molecular Formula | C12H16O2 |
| Molecular Weight | 192.25 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Naphthalene Standards
- Naphthalene-1-sulfinic acid (CAS 607-33-0)
- Naphthalene-1,8-dithiol (CAS 25079-77-0)
- Naphthalene-2,6-dithiol (CAS 96892-95-4)
- Naphthalene-2,7-dithiol (CAS 71977-56-5)
- Naphthalene-1,4,5,8-tetraamine (CAS 2187-88-4)
- Naphthalene-1,4-diyldimethanol (CAS 57322-45-9)
- Naphthalene-1-carbothioamide (CAS 20300-10-1)
- Naphthalene-2-carbothioamide (CAS 6967-89-1)
Recommended Standards
- Methyl4-ethynylbicyclo[2.2.2]octane-1-carboxylate (CAS 96481-32-2)
- Octahydro-1H-4,7-methanoindene-1,1-dicarbaldehyde (CAS 25896-97-3)
- methyl 4-p-tolylbutanoate (CAS 24306-23-8)
- Oxeladin EP Impurity B (CAS 5465-28-1)
- Rhenium oxide (CAS 12624-27-0)
- Piperidin-4-yl(m-tolyl)methanone (CAS 344334-10-7)
- 2-(Chloromethyl)-3-(3-(trifluoromethyl)phenyl)quinazolin-4(3H)-one (CAS 312510-67-1)
- 3-(2-Fluorophenyl)-5,6,7,8,9,10-hexahydrocycloocta[c]pyridazine (CAS 918873-70-8)
- Sugammadex Impurity Org48301 (CAS 2412952-86-2)
- 6-Bromo-1H-indole-4-carboxylic acid (CAS 898746-91-3)
- Methyl 2-chlorofuran-3-carboxylate (CAS 58235-81-9)
- 6-Bromo-5-(difluoromethyl)-4-iodonicotinic acid (CAS 1805415-11-5)
- (E)-3-(2-Methyl-1H-indol-3-yl)-1-(pyridin-4-yl)prop-2-en-1-one (CAS 1363421-29-7)
- D-Ser39-Tirzepatide (CAS CATO-CPTD788694)
Why CATO?
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