| CAS No. | 61433-07-6 |
| Molecular Formula | C13H9N3OS |
| Molecular Weight | 255.30 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
TAN [=1-(2-Thiazolylazo)-2-naphthol] [Spectrophotometric reagent for transition metals] (CAS 61433-07-6) is a high-purity analytical reference standard with the molecular formula C13H9N3OS and a molecular weight of 255.30 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, sulfur-containing functionality, a hydroxyl group, an ether linkage, TAN [=1-(2-Thiazolylazo)-2-naphthol] [Spectrophotometric reagent for transition metals] is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 255.30 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
As a certified reference material (CRM), TAN [=1-(2-Thiazolylazo)-2-naphthol] [Spectrophotometric reagent for transition metals] 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.
| Molecular Formula | C13H9N3OS |
| Molecular Weight | 255.30 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1974 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |