Synonyms: Phosphonicacid, [[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]-, monoethyl ester,calcium salt (2:1) (9CI);Calcium (3,5-di-tert-butyl-4-hydroxybenzyl monoethylphosphonate);Calcium bis(ethyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate);Calciumbis[ethyl (3,5-di-tert-butyl-4-hydroxyphenyl)methanephosphonate];Calciumbis[monoethyl (3,5-di-tert-butyl-4-hydroxybenzyl)phosphonate];Calcium diethylbis[[[3,5-(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]phosphonate];IR 1425WL;Irgamod195;Irganox 1425;Irganox 1425WL;