"Dr. John Kincaid has told me today that one discovery that was made by our group in Pasadena during the Second World War
has been pretty universally adopted.... We showed that dinitrodiphenylamine was less basic and for this reason was a more
effective stabilizer than diphenylamine itself. He said that dinitrodiphenylamine is now universally used in powder." Linus Pauling. Note to Self. April 22, 1983.