Wikipedia; "Sodium dichromate is an oxidizer and chemical compound with the formula Na2Cr207. Usually, however, the salt is handled as its dihydrate Na2Cr2O7·2H2O. Virtually all chromium ore is processed via conversion to sodium dichromate. In this way, many millions of kilograms of sodium dichromate are produced annually. In terms of reactivity and appearance, sodium dichromate and potassium dichromate are very similar. The sodium salt is, however, around twenty times more soluble in water than the potassium salt (49 g/L at 0 °C) and its equivalent weight is also lower, which is often desirable". Also soluble in methanol, ethanol and other solvents, its high solubility is considered an asset for use in chemical compounding and protective coatings for metals. Used as a combustion catalyst with chlorates, perchlorates and ammonium nitrate where it lowers the ignition points for easier ignition. It does this by "allowing" the oxidizer to decompose at a lower temperature thus releasing its oxygen to support combustion earlier and increasing the burn rate accordingly. Like the potassium salt, a hot water solution is also used to coat magnesium and other metals to prevent decomposition and because of its higher solubility, may be the better choice for coatings. Appearance - red/orange crystaline; Density - 2.52 g/cm3; Melting point - 356.7°C (674.1°F). Like all hexavalent chromium compounds, sodium dichromate is considered hazardous and a known carcinogen. No ATFE required to order