1869 G. Fownes (ed. 10) 667 The crystallized acid melts at 193° C. (379° F.), and is resolved between 210° and 212° C. (410°–414° F.) into carbonic dioxide and oxyphenol or pyrocatechin C6H6O2.
1952 29 Aug. 221/1 Chemically the emulsifier can be described as a polyethylene oxyphenol of high molecular weight.