FIELD: detergents. SUBSTANCE: invention relates to sodium percarbonate and detergents containing thereof. The indicated percarbonate has the mean particle size from 500 to 1000 mcm being 20% of particles by mass, not above, has a size less than 350 mcm. Water absorption measured in test at 80% of relative humidity and at 32 C in 24 h is 30 g per 1000 g of sample, not above. Invention describes method of selection of sodium percarbonate showing the above-mentioned indices and designated for addition to detergent compositions containing a modified addition also. EFFECT: improved stability of sodium percarbonate as component of detergent compositions. 20 cl, 6 tbl
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