Silicon Powder CAS No: 7440-21-3 Used to coat surfaces of cups and paddles for handling semi-conductors in the electronics industry. Not less than 99.99% purity by weight. Dark brown powder, insoluble in water.

G.I.R. 1 & 6. Notes to Chapter 28. HSEN'S to heading 2804. Text to codes 2804 & 2804 61. Re-issue of BTI IENEN004-2022-BTI271.