Calcium sulfide

CaS has been studied as a component in a process that would recycle gypsum, a product of flue-gas desulfurization.

In terms of its atomic structure, CaS crystallizes in the same motif as sodium chloride indicating that the bonding in this material is highly ionic.

[2] Milk of lime, Ca(OH)2, reacts with elemental sulfur to give a "lime-sulfur", which has been used as an insecticide.

Calcium sulfide is phosphorescent, and will glow a blood red for up to an hour after a light source is removed.

It is a rare component of some meteorites and has scientific importance in solar nebula research.

Calcium sulfide
Calcium sulfide
NFPA 704 four-colored diamond Health 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroform Flammability 0: Will not burn. E.g. water Instability 3: Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked. E.g. hydrogen peroxide Special hazards (white): no code