Here's a good article on the subject. The insecticide is Permethrin.
http://www.travelstart.co.za/blog/ai...abin-spraying/
For the purpose of disinfection of South African Airways aircraft, single-shot Servopak Airline Insecticide (Reg.No L1907 Act 36/1947) aerosol dispensers are utilized. All possible insect harborages inside the aircraft must be treated. The active ingredient is Permethrin. The World Health Organisation (WHO) has declared the spray safe for use onboard the aircraft.