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dmpa origin china cas no. 4767-03-7 purity ?99% dimethylolpropionic acid (dmpa) molecular formula c5h10o4 molecular weight 134.13 cas no 4767-03-7 properties odorless, free flow white crystal melting point 185-190?; density?0.84. technical indexes assay (%) ?99 moisture (%)?0.2 ash (%)?0.03 residual aldehyde (%)?0.01?hydroxyl value (mgkoh/g) 810-860 fe (ppm)?5 na (ppm)?30 k (ppm)?10 p(as phosphate) (ppm)?10 si(as silicate) (ppm)?1 sulfate ion (ppm)?10 solubility test in acetone-triethylamine clear uses ?it can be used in water soluble pu system, water soluble alkyd resin, polyester resin, epoxy ester coating, pu elastomer and powder coating. now, it is mainly used in coating of water soluble pu system, adhesive and leather coating agent packing?25kg in paper-plastic laminated bag or cardboard drum. or following your?demands. storage?sealed, kept in cool and dry place. if piled, it should be laid on wood sheet with thickness of 10cm) and the distance from wall is 50cm.