Item unit typical standard test method al (oh)3 % 99.6 max 99.5 by difference al2o3 % 64.50 max 65.00 by difference sio2 % 0.08 max 0.015 isiri 908 fe2o3 % 0.010 max 0.020 isiri 904 na2o % 0.33 max 0.40 isiri 10616 cao % 0.009 max 0.020 isiri 10619 l.o.i % 34.7 max 35 isiri 8346 moisture % 7 max 10 isiri 8346 -44 μm % 11 max 15 iso 13320 +150 μm % 14 max 25 iso 13320 median μm 92 80-120 iso