Purified Terephthalic Acid ( PTA) Tondgoyan is ONE Of the organic compounds with formula C₆H₄(CO₂H)₂. This white solid is a commodity chemical, used especially as a precursor to the polyester PET, mostly used in making clothing and plastic bottles.
This kind of saffron is called *pushal saffron*. The completely red with yellow flowers, which is the percentage of very low thickness. Very thin as a few millimeters.