Specification
| Appearance | Pale yellow liquid |
| Molar concentration, mol/L, min. | 3.22 |
| DOS content, % by weight, min. | 98.8 |
| Density, g/cm³ | 0.844 |
| Molecular weight | 258 |
| Sulfide sulfur content, % | 12.3 |
| CAS No. | 2690-08-6 |
Typical use for gold assay
Gold is extracted from an acidic chloride solution (after aqua regia digestion) with a solution of DOS, most often in toluene; the concentration is set by your laboratory's method. The ideal diluent is aviation kerosene (grade RT): the kerosene extract allows maximum aspiration in the flame and can be introduced into ICP-OES, whereas a toluene extract requires reduced aspiration in an air–acetylene flame and special introduction devices for ICP. Measurement: flame AAS (Au 242.8 nm) or ICP-OES (Au 242.795 nm, 267.595 nm).
| Detection limit, Au | from 0.003 g/t (ICP-OES); from 0.05 g/t (flame AAS) |
| Consumption | depends on your method; indicatively 1 L ≈ 6,500–8,000 determinations |
| Selectivity | practically only palladium is co-extracted with gold; iron does not interfere |
Working parameters follow your laboratory's validated method. We can send the texts of the standard methods (GOST, NSAM; in Russian) on request.
Packaging, storage, delivery
- Packaging: 1 L bottles. Price on request.
- Storage: in a dark place at not more than 40 °C; shelf life not less than 5 years.
- Documents: certificate of analysis for each batch, safety data sheet.
- Delivery within Russia: 10–15 days; international delivery by agreement.