cas no. 6419-19-8~~~ appearance:colorless or light yellow transparent liquid~~~ active acid %:48.0-52.0~~~ chloride (as cl-)%:2.0(or1.0) min~~~ ph value (1%solution) :2.0 max~~~ fe (as fe3+) (ppm):20~~~ density (20?)g/cm3:1 .33 min~~~ colour apha (hazen):40 max