| Wavenumber (cm−1) | Band Assignment | Ref. |
| 3750 - 3500 | Alcohols -OH | [29] [36] [37] [38] |
| 3650 - 3500 | Hydrogen bonding free | [8] |
| 3650 - 3250, 1450 - 1400, 1050 - 1000 | Hydroxyl (-OH) | [39] |
| 3600 - 3100 | OH stretching | [9] [40] [41] [42] |
| 3500 - 3420, 3420 - 3340, 1650 - 1580, 850 - 750 | Amino acids/Amines (NH2) | [12] |
| 3500 - 3400 | O-H stretching region | [7] [24] [43] |
| 3500 - 3300 | Secondary and primary amines N-H stretch | [44] |
| 3500 - 3300 1650 - 1550 900 - 660 | Amino | [39] |
| 3500 - 3100 | Alcohol (C-OH) | [17] [20] |
| 3500 - 2500, 1440 - 1395, 960 - 900 | Aliphatic carboxylic acids (OH) and Amino acids/Amines (OH) | [12] |
| 3500 - 2500 | Carbohydrates (C-OH) | [12] |
| 3500 - 3100 | Organic hydroxyl (C-OH) | [19] |
| 3440 - 3400 | Hydroxyl (-OH) | [30] |
| 3400 - 2500 | Carboxylic acid (OH) | [45] |
| 3400?2400 | Carboxylic acid (OH stretch) | [24] [44] |
| 3400, 1440 - 1220, 1260 - 1000 | Alcohol and phenol | [44] |
| 3400, 1625 | Amine (NH2) | [19] [20] |
| 3400 | OH stretching of phenol hydroxyl and carboxyl | [5] |
| 3382 - 3323 | Alcohol (OH) | [45] |
| 3380 | H-bonding of hydroxyl | [46] |
| 3350, 1350, 650 ± 50 | Alcohols/Phenols (OH) | [12] |
| 3350 - 3205 | Alcohol COH | [24] |
| 3350, 3180 | Primary amide N-H stretch | [44] |
| 3300 - 3150 | Alcohol groups | [33] |
| 3300 - 2900 | C-H stretching in alkane, alkene, alkyne, aromatic | [44] |
| 3300 | Secondary amide N-H stretch | [44] |
| 3300 | Hydrogen bonded | [8] |
| 3200 - 3000, 1290 - 1000 | Aromatic carbon (Arom-H) | [38] |