The FTIR analysis result of the mango peels powder samples (UMP and WMP) for the wavenumber range 4000-450 cm -1 (mid-infrared region spectrum) shown in Figure . FTIR bands that appeared in the 4000-1500 cm -1 region corresponded a function group, and the fingerprint region was identified by the presence of significant absorption bands in the 1500-500 cm -1 region. Both the samples UMP (unwrinkled mango peel) and WMP (wrinkled mango peel) showed similar bands for the same spectral regions. But the absorption intensity was found to be dissimilar for some of the representative bands. FTIR spectra were observed, with strong and broad absorption regions around 3288.61 and 3292.33 cm -1 for both the samples WMP and UMP, respectively, which are indicative of O-H stretching vibrations caused by unbound and bound hydroxyl groups of carboxylic acid. Similarly, other bands of the samples WMP and UMP were also found at near regions. Sharp bands corresponding to C-H absorptions, including stretching of CH, CH2, and CH3, were found between 3000 and 2700 cm -1 . Stronger bands between 1750 and 1730 cm -1 and between 1620 and 1600 cm -1 , respectively, may be signifying the presence of the ester carbonyl (C=O) groups and carboxylate stretching bands (COO-). The low intensity absorption bands near 1460-1420 cm -1 depict the C-C-O stretching vibration (C=C stretching), while 1330-1150 cm -1 for O-H bending vibration which might be arising from tannic acid. The C-O group of compounds have a distinct absorption band at region 1030-1020 cm -1 . The stretching vibration of phenols may be represented by the bands around 800-630 cm -1 , - . Thus, there is no such significant change found among the bands pattern of the samples (WMP and UMP), but a higher absorption intensity was observed for WMP than UMP. Also, the absorption band of WMP near 2848 cm -1 (C-H stretching, alkane) was identified as sharp and strong compared to the absorption band of UMP.