6838-93-3 Isopropyl methyl phosphonic acid sodium salt Methylphosphonic acid isopropyl ester sodium salt NSC 289443 Phosphonic acid, methyl-, isopropyl ester, sodium salt Phosphonic acid, methyl-, mono(1-methylethyl) ester, sodium salt (9CI) Phosphonic acid, methyl-, monoisopropyl ester, monosodium salt (8CI) Sodium isopropyl methylphosphonate