Structural formula

Business number 01G7
Molecular formula C6H14N2O2
Molecular weight 146.19

DL-2,6-diaminocaproic acid,


DL-lysine monohydrate

Numbering system

CAS number:70-54-2

MDL number:MFCD00064432

EINECS number:200-740-6

RTECS number:None

BRN number:1616991

PubChem number:24896317

Physical property data

1. Properties: colorless crystals

2. Density (g/mL, 25/4℃): 1.12

3. Relative vapor density (g/mL, Air=1): Uncertain

4. Melting point (ºC): 170 (dec.)(lit.)

5. Boiling point (ºC, normal pressure): Uncertain

6. Boiling point (ºC, 5.2kPa): Uncertain

7. Refractive index: Uncertain

8. Flash point (ºC): Uncertain

9. Specific rotation (º): Uncertain

10. Autoignition point or ignition temperature (ºC): Uncertain

11. Vapor pressure ( kPa, 25ºC): Uncertain

12. Saturated vapor pressure (kPa, 60ºC): Uncertain

13. Heat of combustion (KJ/mol): Uncertain

14. Critical temperature (ºC): Uncertain

15. Critical pressure (KPa): Uncertain

16. Oil-water (octanol/water) partition coefficient relationship Value: Uncertain

17. Explosion upper limit (%, V/V): Uncertain

18. Explosion lower limit (%, V/V): Uncertain

19. Solubility: soluble in water, slightly soluble in ethanol, insoluble in ether

Toxicological data


Ecological data


Molecular structure data

1. Molar refractive index: 38.43

2. Molar volume (cm3/mol): 129.9

3. Isotonic specific volume (90.2K ): 348.1

4. Surface tension (dyne/cm): 51.5

5. Polarizability (10-24cm3): 15.23

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): None

2. Number of hydrogen bond donors: 3

3. Number of hydrogen bond acceptors: 4

4. Number of rotatable chemical bonds: 5

5. Number of tautomers: none

6. Topological molecule polar surface area 89.3

7. Number of heavy atoms: 10

8. Surface charge: 0

9. Complexity: 106

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain number of atomic stereocenters: 1

13. Determine the number of chemical bond stereocenters: 0

14. Number of uncertain chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability


Storage method

This product should be kept sealed, cool and dry.

Synthesis method

It can be extracted from the protein hydrolyzate produced by co-heating of protein and alkali or produced by organic synthesis using dihydropyran as raw material. The resulting product is DL-lysine. In fact, it is the same amount. A mixture of D-lysine molecules and L-lysine molecules are optical isomers of each other.


Lysine is a key substance that helps other nutrients be fully absorbed and utilized by the human body. Only by supplementing enough L-lysine can the human body improve the absorption and utilization of food protein, achieve balanced nutrition, and promote growth and development.