... .2 Residual melamine% (≤) 0.002 PH value (20 ° C) 5.5-6.5 Proportion g/cm3 1.70 Bulk ... 0.3-0.4 Water-soluble g/100ml (20 °C) 0.002 Particle size D50% (um) (produced according ... ; heat good stability, long-term heating at 300 °C, the heat loss is low; also has a similar ... toxic, environmentally friendly, odorless, very stable within at 300 °C, 600 °C above decomposition . It has a flame-retardant effect, a ...