Calcium nitrate
From PyroGuide
Formula: Ca(NO3)2
Synonyms: Norwegian saltpeter,
Description: Calcium nitrate is the calcium salt of nitric acid. It's extremly hygroscopic, much more than Sodium nitrate. Because of that it's not used much in pyrotechnics.
Hazards: Calcium nitrate is an oxidizer, store separate from fuels and acids.
Sources: Calcium nitrate is used as a fertilizer..
Hazard Symbols: O