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Appearance
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Fine, white, odorless, tasteless, bulky powder, free from grittiness
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Assay (as BaSO4)
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97.5 -100.5%
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Solubility
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Practically insoluble in water, in organic solvents, and in solutions of acids and of alkalies
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Identifications
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To comply IP, BP, USP tests
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Acidity or alkalinity
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To comply IP, BP tests
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pH (10% w/w solution)
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3.5 –10.0
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Acid soluble matter
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Max 0.3%
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Oxidisable sulfur compounds
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To comply BP test
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Soluble barium salts
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Max 0.001% (to comply IP test)
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Phosphate (PO4)
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To comply IP tests
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Heavy metal (as Pb)
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Max 0.001%
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Sulphide (S)
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Max 0.5 µg/g (to comply IP test)
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Arsenic (As)
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Max 0.0002%
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Loss on ignition (at 600 ± 50°C)
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Max 2.0 %
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Bulkiness
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To comply IP tests
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