Crystallinity is important in determining catalyst performance, so we use FTIR to determine crystallinity and phase structure. FTIR provides an easy, precise, and fast approach to visualize the turnover from castor oil during transesterification to FAME. The raw oil and the methyl esters are fairly strong absorbers in the infrared region according to . The spectra in (Fig. ) shows the wave numbers 1681.98 cm -1 , 1519.96 cm -1 , 1411.94 cm -1 , 1118.75 cm -1 , 1519.96 cm -1 , and 1026.16 cm -1 suggests the presence of C=O stretch, N-O asym-stretch, S=O sulfate ester, C=S thiocarbonyl, and P=O phosphine oxide (P-O-R esters)