• Halogen-free per J-STD-004B
• Light-colored, low-residue, and rosin-free flux and residue for enhanced pin-testing performance
• Tested compatibility with Hot Air Solder Leveled (HASL), Immersion Silver, Electroless Nickel Immersion Gold (ENIG), and Organically Solder Preserved (OSP) Copper surfaces

Indium Corporation’s WF-9955 flux has almost no color when received in its shipping container. This is because it is anhydrous isopropyl alcohol-based with less than 5% solids and no dark-colored components, such as rosins or modified rosins. Because the flux is anhydrous alcohol-based and has low solids, the specific gravity is very close to that of alcohol and has the same flash point as pure isopropyl alcohol.