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Primary particles of 10 - 300 nm which are aggregated to a size of 100 - 1200 nm which may form agglomerates within the size distribution of 300 nm - mm.
Toluene extractables: maximum 0,1 %, determined according to ISO method 6209.
UV absorption of cyclohexane extract at 386 nm: < 0,02 AU for a 1 cm cell or < 0,1 AU for a 5 cm cell, determined according to a generally recognised method of analysis.
Benzo(a)pyrene content: max 0,25 mg/kg carbon black.
Maximum use level of carbon black in the polymer: 2,5 % w/w.
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