Glycine
Glycine is the simplest (and the only achiral) proteinogenic amino acid, with a hydrogen atom as its side chain. It has a role as a neurotransmitter, a micronutrient, a nutraceutical, a hepatoprotective agent, an EC 2.1.2.1 (glycine hydroxymethyltransferase) inhibitor, a NMDA receptor agonist and a fundamental metabolite. It is a serine family amino acid, an alpha-amino acid and a proteinogenic amino acid. It is a conjugate base of a glycinium. It is a conjugate acid of a glycinate. It is a tautomer of a glycine zwitterion.
IUPAC: 2-aminoacetic acid
PubChem
Physical & Chemical Properties
| Melting Point | 451 °F (NTP, 1992) |
| Density | 1.1607 (NTP, 1992) - Denser than water; will sink |
| Solubility | greater than or equal to 100 mg/mL at 64 °F (NTP, 1992) |
| Vapor Pressure | 0.00000013 [mmHg] |
| pH | 0.2 molar soln in water: 4.0 |
| Appearance | Glycine appears as white crystals. (NTP, 1992) |
Data: PubChem · Last updated: 4/20/2026
GHS Classification
No GHS classification data available.
Classification data is sourced from ECHA.
Regulatory Compliance
Listed
note: Status based on EPA TSCA Active Inventory · inventory name: TSCA Chemical Substance Inventory
View sourceGlobal Trade Intelligence
No trade flow data available for this chemical.
HS Code(s): 2922
Data: UN Comtrade
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