Mobil Gear 600 Xp 320 Product Important Health, Safety, And Environmental Information Relative Density ( At 15 C ) : 0.9 Flash Point [ Method] : > 200C ( 392F) [ Astm D-92] Flammable Limits ( Approximate Volume % In Air) : Lel: 0.9 Uel: 7.0 Autoignition Temperature: N/ D Boiling Point / Range: > 316C ( 600F) Vapor Density ( Air = 1) : > 2 At 101 Kpa Vapor Pressure: 3.5 Solubility In Water: Negligible