... Phosphoric Acid is produced by THERMAL PROCESS from yellow phosphorous with high purity, low impurities esp Pb, As Cd Phosphoric AcidSPECification: AS CHINA ... PPM- OXIDE (H3PO3): 0.002%Properties: 1.Phosphoric Acid is Colorless, transparent and syrupy liquid, and melting ... moderately strong acid, its acid is stronger than carbonic acid. When the PH is different, Phosphoric Acid and sodium carbonate ...