PTA is mainly used in the production of polyester products, ... (APHA) 10 maxIron (ppm) 0.5 maxPara Toluic Acid (ppm) 120 maxTotal metals Fe, Mn, Co, Cr, Ni, Mo, Ti (ppm ... 2 maxΔ Y 10 maxb-Color 1.5 max Applications PTA is mainly used in the production of polyester products, including ... container). Bulk container (up to 25MT per 20ft container).-------------------------- PTA (Purified Terephthalic Acid)