Polyester is produced using two principal raw materials, PTA and MEG. PTA is made from PX, which is part of the aromatics chain and is found in crude oil. MEG is produced from ethylene, which can be produced from either gas or crude oil. PX, PTA, and MEG are commonly referred to as polyester feedstocks because the majority of their global production is used to manufacture polyester. While polyester is an 80 million ton a year market, polyester feedstocks account for 130 million tons of annual demand. The global consumption of PTA is approximately 60 million tons a year. PX consumption is about 40 million tons a year. MEG demand is about 30 million tons a year of which 90% is used to make polyester and about 10% is used for anti-freeze applications. At room temperature, PX is a colorless but highly flammable liquid. PTA appears as white crystals or white powder. Like PX, MEG is also a colorless liquid which is practically odorless.