Barium Sulphate USP

Barium sulphate is the inorganic compound with the chemical formula BaSO4. It is a fine, white, odorless, tasteless, bulky powder, free from grittiness.


Barium sulphate


Chemical Name: Barium Sulphate
Mol. Formula: BaSO4
Mol. Weight: 233.39  g/mol
CAS No.: 7727-43-7


General Specifications

Test Specification
Characters It occurs as a fine, white, odorless, tasteless, bulky powder, free from grittiness.

Test (A)


Test (B)


(a)Sulfates: Specified Test. The filtrate, acidified with hydro-chloric acid, meets the requirements.

(b)Barium: Specified Test. The solution meets the requirements.

Solubility It is practically insoluble in water, in organic solvents, and in solutions of acids and alkalies.
pH 3.5–10.0, in a 10% (w/w) aqueous suspension
Sulfide Maximum 0.5 mg/g
Acid-Soluble Substances Maximum 0.3%
Soluble Barium Salts Maximum 0.001%
Residual Solvents Meets the requirement.
Heavy Metals Maximum 10 ppm
Assay Not less than 97.5% and not more than 100.5% of barium sulfate (BaSO4)


Shelf life, Storage and Packing

It should be stored in a segregated area in a cool and ventilated place away from combustible materials. Keep in a tightly closed container, sealed until ready for use. It is packed in 25kg or 50kg HDPE bags or drums as required.


GLP, cGMP (FDA) Approved, ISO 9001, ISO 14001, ISO 45001, ISO 17025, ISO 22000, FSSC 22000, FSSAI, Halal and Kosher certified.
We observe WHO Good manufacturing practice and Good laboratory practice.

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