T 1779 (OTTO) Tin powder, -45 to +20 μm, ≥99.5% Cas 7440-31-5 - used for reagent analysis, industry, etc. T 1779 (OTTO) Tin powder, -45 to +20 μm, ≥99.5% Cas 7440-31-5 - used in spray-on applications for corrosion resistance. T 1779 (OTTO) Tin powder, -45 to +20 μm, ≥99.5% Cas 7440-31-5 - used in the manufacturing of high-powered magnets and self-lubricating bearings. Zinc Powder – Zinc powder is incredibly versatile. T 1779 (OTTO) Tin powder, -45 to +20 μm, ≥99.5% Cas 7440-31-5 - used to manufacture galvanized steel and to create brass.