About Polyethylene-polypropylene glycol:Polyethylene-polypropylene glycol is usually of the following types: molecular weight 950 (No. 3), 1200 (No. 4), 1450 (No. 5), 1750 (No. 6), 2050 (No. 7), 2250 (No. 8), 2750 (No. 9), 3250 (No. 10). The proportion of the partial molecular weight of hydrophilic agglomerated ethylene oxide to total molecular weight is usually 10%-80%….