HG/T 3538-2011
HG/T 4329-2012
Water treatment chemical-Ethylene diamine tetra (methylene phosphonic) penta sodium salt
SH 2604.02-2003
Water treatment chemicals-solidum(ethylenedinitrilo)-tetramethylenephosphate
HG/T 3538-2003
Water treatment chemical-Sodium ethylene diamine tetramethylene phosphonate
HG/T 4330-2012
Water treatment chemical-Sodium salt of diethylene triamine penta(methylene phosphonic acid)
HG/T 3538-1989