| FTIR shift/cm−1 | Assign | Ref. |
| 3469.70 | O-H str | Sudhakar et al., 2018 [25] |
| 3006.82 | C-H st.vib. (sp2) | Poiana, et al., 2015 [26] |
| 2923.88 - 2854.45 | C-H st.vib. (sp3) | Liu, and Kazarian, 2022 [27] |
| 2731.02 | Aldehydic C-H Str. | Hafeez, et al., 2019 [28] |
| 2360.71 | C-H | Evangelin and Gurulakshmi, 2020 [29] |
| 1745.46 | C=O st.vib. | Zhuang, 2020 [30] |
| 1654.81 | C=O Str. | Gupta, et al., 2011 [31] |
| 1650 | C=C st.vib. | Panicker, et al., 2009 [32] |
| 1463.87, 1377.08 | CH3, CH2 bend. | Priest, et al., 1999 [33] |
| 1163.00 | C-O st.vib. | Simonova, and Karamancheva, 2013 [34] |