Salt additives, <anti-caking> agents: E numbers, safe E numbers, not safe - avoid 341 tricalcium phosphate 460(ii) powdered cellulose 470b magnesium stearate 500 sodium bicarbonate 550 sodium silicate 551 silicon dioxide 553a magnesium trisilicate 570 stearic acid 900 polydimethylsiloxane 535 sodium ferrocyanide 536 potassium ferrocyanide 538 calcium ferrocyanide 542 calcium phosphate 552 calcium silicate 553b talcum powder 554 sodium aluminosilicate 555 potassium aluminium silicate 556 calcium aluminosilicate 558 bentonite 559 aluminium silicate 900 polydimethylsiloxane