Gem bids for Barium Chromate 1 Apparent Density 0.35 To 0.65G/Ml. 2 Mean Diameter Of Particle 2.0 Micron Max, Barium Chromate 1 Apparent Density 0.35 To 0.65G/Ml. 2 Specific Surface Area Approx 50, 000 Cm Sq