Silica Gel red/yellow, 3-6 mm, with colour indicator, pearls, 500 g, plasticSilica Gel red yellow, 3 6 mm, with colour indicator, pearls, Density (D) 2,2 g cm, CAS No. 7631 86 9, EC No. 231 545 4 Alternative product: environmentally friendly silica gel. Patented, organic humidity indicator heavy metal free Reversible colour change Note: We recommend activating silica gels before using it for the first time Properties: Regeneration at 120 C, approx. 4 hours Adsorptive capacity: at 40 % rel. humidity approx. 20 wt% Colour