The pascal (symbol: Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus and ultimate tensile strength. It is defined as one newton per square metre. It is named after the French polymath Blaise Pascal.
Wikipedia English The Free Encyclopedia. Organophosphate. An organophosphate (sometimes abbreviated OP) or phosphate ester is the general name for esters of phosphoric acid. Many of the most important biochemicals are organophosphates, including DNA and RNA, as well as many of the cofactors essential for life. Organophosphates are the basis of many insecticides, herbicides, and nerve agents.
phthalate. n. 1. (Chemistry) a salt or ester of phthalic acid. Esters are commonly used as plasticizers in PVC; when ingested they can cause kidney and liver damage.1  Facebook.. A salt, ester, or anion of phthalic acid. 2. Any of a group of esters of phthalic acid that are widely used in the manufacture of plastics and as synthetic additives in perfumes and cosmetics.