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Polyhexamethylene guanidine (PHMG) is a guanidine derivative that is used as a biocidal disinfectant, often in the form of its salt polyhexamethylene guanidine phosphate (PHMG-P). Studies have shown that PHMG in solution has fungicidal as well as bactericidal activity against both Gram-positive and Gram-negative bacteria . [ 2 ]
In 1998, PHMG was founded as PleaseHoldUK in Chester, England.Its office relocated to Manchester in 2000, where the global headquarters has been based since. The agency has rebranded several times. PleaseHoldUK became PH Media Group in 2008, before transitioning to PHMG in 2016. Following significant growth into new territories, the company underwent its most recent
Reckitt Benckiser Korea submitted a toxicity report on PHMG to prosecutors in January 2016; prosecutors were also investigating allegations that the company suppressed data showing PHMG to be toxic in the report it had submitted. [66] In April 2016, a coalition of consumer groups called for a boycott of the company. [67]
Pioneer in teaching chemical engineering. Co-authored, with W. K. Lewis and W. H. McAdams, the first American textbook of chemical engineering, Principles of Chemical Engineering, published in 1924. Massachusetts Institute of Technology: Jack Welch (1935–2020) Former chairman and chief executive officer of General Electric: General Electric
Allied Corp. was a major American company with operations in the chemical, aerospace, automotive, oil and gas industries. It was initially formed in 1920 as the Allied Chemical and Dye Corporation as an amalgamation of five chemical companies. In 1958, it was renamed Allied Chemical Corporation when it diversified into oil and gas exploration.
Great Lakes Chemical Company was founded in Michigan in 1936 to extract bromine from underground salt water brine deposits. It was acquired by McClanahan Oil in 1948 and rechristened Great Lakes Oil and Chemical Company, but by 1960 the company had moved away from oil and gas, instead focusing on the research and production of bromine-based chemicals.
Today, chemical engineering is a highly regarded profession. Chemical engineers with experience can become licensed Professional Engineers in the United States, aided by the National Society of Professional Engineers, or gain "Chartered" chemical-engineer status through the UK-based Institution of Chemical Engineers.
[8] The name is a portmanteau of the words chemical and Nemours, a nod to DuPont's full name, E. I. du Pont de Nemours & Co. The company's CC ticker symbol, is also a play on DuPont's DD symbol; it was also formerly used by the electronics retail Circuit City prior to its bankruptcy in 2009.