Calcium Sulfide CAS#20548-54-3
Slight Water Solubility – Calcium sulfide is slightly soluble in water, making it stable in various applications.
Reactive with Acids – It reacts with acids to produce hydrogen sulfide gas, useful for chemical synthesis.
Stable Physical Properties – Exhibits a pale yellow to light gray appearance with a distinct, stable composition.
Hygroscopic Nature – Absorbs moisture from the air and releases H₂S, showing strong chemical reactivity in humid environments.
Calcium sulfide is only slightly soluble in water and insoluble in alcohol. When it comes into contact with acids, it generates hydrogen sulfide gas. This compound appears as a pale yellow to light gray solid with a bitter taste. It is hygroscopic in nature, releasing an H₂S odor when exposed to moist air.
CALCIUM SULFIDE Chemical Properties
Melting point | 2000 °C |
Density | 2.6 |
Refractive index | 2.12 |
Solubility | Slightly soluble in H2O; insoluble in ethanol |
Form | Powder |
Specific Gravity | 2.5 |
Color | White |
Water Solubility | Slightly soluble in water. Insoluble in alcohol. |
Sensitive | Moisture Sensitive |
Crystal Structure | NaCl type |
Crystal system | Cube |
Merck | 14,1707 |
Space group | Fm3m |
Lattice constant | a/nmb/nmc/nmα/oβ/oγ/oV/nm30.569080.569080.569089090900.1843 |
CAS DataBase Reference | 20548-54-3(CAS DataBase Reference) |
EPA Substance Registry System | Calcium sulfide (CaS) (20548-54-3) |
Safety Information
Hazard Codes | Xi,N |
Risk Statements | 31-36/37/38-50 |
Safety Statements | 28-61 |
RIDADR | UN 3179 4.1/PG 2 |
WGK Germany | 2 |
TSCA | Yes |
HazardClass | 4.3 |
PackingGroup | III |
Product Usage
Calcium sulfide is utilized in the production of luminous paints and thiourea, and it also serves as a food preservative, lubricant filler, and depilatory agent in the leather industry. Additionally, it can function as an analytical reagent and as a base material for phosphors. The purified form is commonly applied in the electronics industry.
