Very similar in properties to Dupont's Freon TMS, Formula 1665 is a mixture of HCFC-225 (Asahiklin AK-225) and methanol. Specifically designed for defluxing in vapor degreasing and cold batch cleaning. AMS offers superior flux removal for type R, RMA, RA and synthetic fluxes. Non-flammable, safe on plastics and elastomers, AMS is the perfect choice for all defluxing applications.