L-Lysine hydrochlorideL-Lysine monohydrochloride; L(+)-LYS hydrochloride; L(+)-2,6-Diaminocaproic acid hydrochloride; L(+)-2,6-Diaminohexanoic acid hy

Basic Information

English Name: L-Lysine hydrochloride CAS No.: 657-27-2 Molecular Formula: C₆H₁₄N₂O₂·HCl Molecular Weight: 182.65 EINECS No.: 211-519-9 MDL Number: MFCD00064564

Physical & Chemical Properties

• Melting Point: 263 °C (decomposed) (lit.)
• Specific Rotation: 21 º (c=8, 6N HCl)
• Density: 1.28 g/cm³ (20 °C)
• Bulk Density: 360 kg/m³
• Vapor Pressure: <1 Pa (20 °C)
• FEMA Number: 3847 | L-LYSINE
• Storage Condition: 2–8 °C
• Solubility: Soluble in water, 100 mg/mL
• Form: Powder
• Color: White to Off-white
• Odor: Odorless
• pH Value: 5.5–6.0 (100 g/L aqueous solution, 20 °C)
• Biological Source: Non-animal source
• Optical Rotation: [α]₂₀/D +20.5±0.5°, c = 5% in 5 M HCl
• Aqueous Solubility: 65 g/100 mL (20 °C)
• Maximum Absorption Wavelength (λmax): λ: 260 nm, Amax: 0.1 λ: 280 nm, Amax: 0.1
• Merck Index: 14, 5636
• BRN Registry Number: 3563889
• Stability: Stable. Incompatible with strong oxidizing agents.

Main Application

Pharmaceutical small-molecule raw material

Cosmetic Ingredient Functions

• HAIR CONDITIONING Agent
• SKIN CONDITIONING Agent

Cosmetic Ingredient Assessment

L-Lysine hydrochloride (CAS No. 657-27-2)

Molecular Identification Codes

• InChI: 1S/C6H14N2O2.ClH/c7-4-2-1-3-5(8)6(9)10;/h5H,1-4,7-8H2,(H,9,10);1H/t5-;/m0./s1
• InChIKey: BVHLGVCQOALMSV-JEDNCBNOSA-N
• SMILES: OC(C@@HCCCCN)=O.[H]Cl
• Estimated LogP: -1.036

Chemical Database References

• CAS Database Reference: 657-27-2
• EPA Substance Registry: Lysine hydrochloride (CAS No. 657-27-2)