N 1507 (OTTO) Nickel nitrate, hexahydrate, GR 99%+ Cas no 13478-00-7 - used as a selective oxidation catalyst for low molecular weight alkanes. N 1507 (OTTO) Nickel nitrate, hexahydrate, GR 99%+ Cas no 13478-00-7 - used as a precursor in the manufacturing of other nickel salts and supported nickel catalysts.