Refractive Index of Common Amino Acids
Amino acids exhibit varying refractive indices depending on their chemical structures and compositions. The following table provides a comprehensive list of refractive index values for common amino acids measured at wavelength (λ) of 589 nm.
| Temperature | ||
|---|---|---|
| Alanine (Ala) (C3H7NO2) | 20 | 1.465 |
| Arginine (Arg) (C6H14N4O2) | 25 | 1.6700 |
| Asparagine (Asn) (C4H8N2O3) | 25 | 1.4880 |
| Aspartic Acid (Asp) (C4H7NO4) | 25 | 1.4540 |
| Cysteine (Cys) (C3H7NO2S) | 25 | 1.5130 |
| Glutamic Acid (Glu) (C5H9NO4) | 25 | 1.4300 |
| Glutamine (Gln) (C5H10N2O3) | 25 | 1.4954 |
| Glycine (Gly) (C2H5NO2) | 25 | 1.4264 |
| Histidine (His) (C6H9N3O2) | 25 | 1.6500 |
| Isoleucine (Ile) (C6H13NO2) | 20 | 1.463 |
| Leucine (Leu) (C6H13NO2) | 20 | 1.463 |
| Lysine (Lys) (C6H14N2O2) | 25 | 1.4650 |
| Methionine (Met) (C5H11NO2S) | 25 | 1.5216 |
| Phenylalanine (Phe) (C9H11NO2) | 25 | 1.5600 |
| Proline (Pro) (C5H9NO2) | 25 | 1.4538 |
| Serine (Ser) (C3H7NO3) | 25 | 1.4368 |
| Threonine (Thr) (C4H9NO3) | 25 | 1.4183 |
| Tryptophan (Trp) (C11H12N2O2) | 25 | 1.5200 |
| Tyrosine (Tyr) (C9H11NO3) | 25 | 1.5270 |
| Valine (Val) (C5H11NO2) | 20 | 1.465 |
Related Tables
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 4) Occupational Safety and Health Administration (OSHA): The National Institute for Occupational Safety and Health (NIOSH).