O-TOLUIDINE DISULFONIC ACID CAS 83-83-0
| CAS No. | 83-83-0 |
| Molecular Formula | C14H16N2O6S2 |
| Molecular Weight | 372.42 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 372.42 g/mol gives O-TOLUIDINE DISULFONIC ACID distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
O-TOLUIDINE DISULFONIC ACID (CAS 83-83-0), molecular formula C14H16N2O6S2 and molecular weight 372.42 g/mol, is a CATO reference standard with documented purity and traceability.
O-TOLUIDINE DISULFONIC ACID (C14H16N2O6S2) contains a nitrogen-containing heterocyclic scaffold, 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), O-TOLUIDINE 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 | C14H16N2O6S2 |
| Molecular Weight | 372.42 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related O Standards
- Toluidine Red (CAS 2425-85-6)
- 63980-34-7 p-Toluidine, N-phenylpropyl- Benzenamine, 4-methyl-N-(phenylpropyl)- N-Phenylpropyl-p-toluidine (CAS 63980-34-7)
- m-Toluidine-d9 (CAS 352431-22-2)
- o-Toluidine-d9 (CAS 194423-47-7)
- p-Toluidine-d9 (CAS 352431-23-3)
- 2-Toluidine-d7 (CAS 68408-22-0)
- p-Toluidine-d7 (NH2) (CAS 68693-08-3)
- o-Toluidine-d3 (methyl-d3) (CAS 151985-13-6)
Recommended Standards
- N-methyl-N-(2-(4-(1-(pyrimidin-2-yl)-1H-pyrazol-3-yl)phenoxy)ethyl)pyridin-2-amine (CAS 956438-32-7)
- PPY A (CAS 875634-01-8)
- N-{5,9-dimethyl-10-oxo-2-oxa-9-azatricyclo[9.4.0.0^{3,8}]pentadeca-1(11),3(8),4,6,12,14-hexaen-13-yl}-4-methylbenzamide (CAS 866152-12-7)
- Thalidomide-NH-C6-NH2 (CAS 2093386-50-4)
- 1-(Tetrahydrothiophen-3-yl)cyclopropan-1-ol (CAS 1340036-71-6)
- methyl 2-(benzylamino)-2-methylpropanoate hydrochloride (CAS 1803597-78-5)
- Tert-butyl 5-aminobenzo[b]thiophene-2-carboxylate (CAS 639819-18-4)
- (1,3,5-Triazin-2-yl)methanamine (CAS 189625-04-5)
- quinoline-2-carbonitrile (CAS 1436-43-7)
- dTAG-7 (CAS 2064175-32-0)
- Tert-butyl (s)-3-(4-fluorobenzamido)piperidine-1-carboxylate (CAS 1286207-77-9)
- 3-(4-Bromophenyl)-1-ethyl-1H-pyrazole HCl (CAS 1403483-87-3)
- 4-[(4-Chlorobenzyl)amino]-4-oxobutanoic acid (CAS 134346-88-6)
- Semaglutide Impurity 157 (x TFA Salt) (CAS CATO-C4X-2226157)
Why CATO?
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