Assertion: copper sulfate | /r/ObjectUse | used in firework manufacture
Facets:
value: as a blue coloring agent
type: PURPOSE
Source sentences:
text: Copper sulfate is also used in firework manufacture as a blue coloring agent, but it is not safe to mix copper sulfate with chlorates when mixing firework powders.
text: Copper sulfate is also used in firework manufacture as a blue coloring agent, but it is not safe to mix copper sulfate with chlorates when mixing firework powders.