(copper (II) chloride, dihydrate; cupric chloride; campfire blue) [CuCl2] blue green crystals.
Copper chloride is primarily used as a brillian blue flame coloring agent for campfires, pine cones, and fireplace logs. Used as a blue coloring agent in some fireworks. Soluble in water. 98% purity.
Although copper chloride is by far the best open flame coloring agent, there are other chemicals which produce green, red, and magenta, shown to the left.