Abstract: Variation relationship between percentage concentration and properties of refined pinane hydrogen peroxide(PHP),such as refractive index,density and viscosity were studied.Effect of temperature on variation of PHP properties was studied as well.As results,there are perfect linear relationships between either refractive index(n) or density(ρ) and percentage content(c,%) of PHP,and the relationships meet regress functions:n=0.000 4c+1.461 2 and ρ=(0.002 5c)+0.850 7,respectively(c=0%-60%).However,there is no linear relationship between viscosity of PHP with its content.Temperature(t) affects remarkably refractive index and density of PHP over different concentrations with constant coefficient in their regress functions n=-4.01×10-4t+n0 and ρ=-7.25×10-4t+ρ0,respectively.These relationships could be applied to practical production of PHP,when proper improvement was brought.That is to say,there is the feasibility to determine on-line the content of PHP through the real-time analysis of its (refractive) index and (density.)