Which of the following statement regarding disinfectants in not true?

Phenol exe microcidal activity by injuring lipid containing plasma membrane, which results in leakage of cellular contents. They remain active in presence of organic compounds, they are stable and persists for long period after application. Ref: Toora (2008), Chapter 7, "The control of microbial growth", In the book,"Microbiology: An Introduction" 9th Edition, India, Page 198; Textbook of Microbiology By Ananthnarayananan, 7th Edition, Pages 30-32; Medical Microbiology By Jawetz, 24th Edition, Page 61