
Glycine is a white crystalline solid, freely soluble in water but insoluble in most organic solvents. It is amphoteric, reacting with both acids and bases to form salts. It is stable under ordinary conditions and undergoes typical amino acid reactions such as decarboxylation and acylation.
| Item | Specification |
| Melting point | 240 °C (dec.) (lit.) |
| Boiling point | 233 °C |
| Density | 1.595 |
| Refractive index | 1.4264 (estimate) |
| Flash point | 176.67 °C |
| Solubility | 100 mg/mL in H₂O |
| Acid dissociation constant (pKa) | 2.35 (at 25 °C) |
| Color | <5 (200 mg/mL) (APHA) |
| PH | 4 (0.2 molar aqueous solution) |
| Odor | Odorless |
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