Mixtures and preparations consisting mainly of (5-ethyl-2-methyl-2-oxido-1, 3, 2dioxaphosphinan-5- yl)methyl methyl methylphosphonate and bis[(5-ethyl-2-methyl-2oxido-1, 3, 2- dioxaphosphinan-5-yl) methyl] methylphosphonate:.
HS codes falls under this category.