We have been producing Phosphotungstic acid hydrate since 2017. We have developed a completely new chemical technology for the production of heteropolyacid. Our technology is environmentally friendly, waste-free, energy efficient. It is much more effective than the traditional technology for the production of heteropolyacids(H3PW12O40*nH2O (PTA, Phosphotungstic acid hydrate CAS Number: 12501-23-4 ), (H4SiW12O40*nH2O (STA, Tungstosilicic acid hydrate CAS Number: 12027-43-9 ) and salts of heteropolyacids e. g. heavy liquid LST . We sell the secret of production (Know-How).