Lysine Hci
Lysine Hci
LYS
9/10
Concern level
High concern
Lysine HCl (lysine hydrochloride) is the hydrochloride salt of the essential amino acid lysine. In cosmetics it is used primarily as a skin-conditioning and hair-conditioning ingredient, and it can also support formula stability in amino-acid blends. It is water-soluble, generally low-risk, and typically included at low levels in leave-on and rinse-off products to help improve feel, hydration support, and compatibility with the skin's natural amino-acid profile.
Pore-clogging
Non-comedogenic
Pregnancy
Safe
Regulatory
No data
Benefits
MoisturizingSoothingSupports Barrier Function
Chemical Properties
Molecular Weight
182.65 g/mol pH Range
3.00 - 8.00Typical Concentration
0.10% - 5.00%CAS Number: 657-27-2
Skin Type Compatibility
dry skin8/10
oily skin7/10
sensitive skin8/10
acne prone7/10
mature skin7/10
normal skin9/10
Interactions
incompatible with: No major direct ingredient conflicts are well documented. In practice, avoid extreme pH environments that could destabilize the overall formula., Can be less useful in formulas with very high levels of strong acids or strong bases due to pH-driven formulation issues.
Risks & Warnings
Generally well tolerated. Potential issues are uncommon but may include mild irritation in very sensitive users or when used in highly acidic/alkaline systems. As with most amino acids/salts, irritation risk is more formulation-dependent than ingredient-dependent.
Vegan Cruelty-Free
