Barium Sulphate ( Barytes)

Barium Sulfate. (barytes (natural); HSN : 2511

BaSO4
ficial, precipitated); base for). Properties: White or yellowish, odorless, tasteless powder, soluble in concentrated sulfuric acid, d 4.25-4.5, particle size 2-25 microns, mp 1580C. Noncombustible. 
Derivation:

(a) By treating a solution of barium salt with sodium sulfate (salt cake).

(b) By-product in the manufacture of hydrogen peroxide.

(c) Occurs in nature as the mineral barite (Arkansas, Missouri, Georgia, Nevada, Canada, Mexico).

Grade: Technical, dry, pulp, bleached, ground, floated, natural, CP, USP, x-ray.
Use: Weighting mud in oil drilling, paper coatings, paints, filler, and delustrant for textiles, rubber, plastics, and lithograph inks, the base for lake colors, X-ray photography, opaque medium for gastro-intestinal radiography, in battery plate expanders.