A method was developed to determine the fluid density of pure hydrogen sulfide (H2S) at a fixed temperature using Raman spectroscopic measurements. The positions of the H2S Raman (1) band were measured at a wide range of temperatures (188.15KT633.15K) and pressures (P506bar) using fused-silica capillary capsules and high-pressure optical cells. The relation among H2S density (), H2S (1) peak position, and T can be represented by =2447.680+0.127xT-1.876x(1)-0.000001xT(2)-0.000048x Tx(1)+0.00036x(1)(2) (root-mean-square error=0.0197g/cm(3) and correlation coefficient=0.9963). This equation can be applied to calculate the density of the H2S fluid from the measured H2S (1) peak position at a given temperature. Finally, the effects of temperature and H2S density on (1) peak position were examined using isochoric and isothermal experiments.