L-Lysine L-Lysine

L-lysine structural formula

Structural formula

Business number 0181
Molecular formula C6H14N2O2
Molecular weight 146.19
label

(S)-2,6-diaminocaproic acid,

(S)-2,6-Diaminocaproic acid,

(S)-(+)-Lysine,

amino acid drugs,

intermediates,

Biochemical reagents

Numbering system

CAS number:56-87-1

MDL number:MFCD00064433

EINECS number:200-294-2

RTECS number:OL5540000

BRN number:1722531

PubChem number:24896404

Physical property data

1. Properties: Colorless needle-like crystals or crystalline powder. Optically active.

2. Density (g/mL, 25/4℃): 1.125

3. Relative vapor density (g/mL, air=1): Undetermined

4. Melting point (ºC): It turns black when heated to 210℃ and decomposes at 224.5℃.

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

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

7. Refractive index: Undetermined

8. Flash point (ºC): Undetermined

9. Specific rotation (º): α]D20 +14.6° (C=6.5, in water), [ α]D23+25.9° (C=2, in 6mol/L hydrochloric acid)

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

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

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

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

14. Critical temperature (ºC): Undetermined

15. Critical pressure (KPa): Undetermined

16. Oil-water (octanol/water) partition coefficient pair Value: Undetermined

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

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

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

Toxicological data

1. Reproductive toxicity: Oral TDLo of female rats: 138mg/kg, conception takes 5-15 days; Oral TDLo of female rats: 72450mg/kg, conception takes 10-20 days; Oral TDLo of female rats: 90450mg/kg, Conception occurs after 10-20 days; oral TDLo in female rats: 81 mg/kg, conception occurs after 10-20 days; intraperitoneal TDLo in female rats: 44 mg/kg, conception occurs after 5-15 days 2. Mutagenicity: sister chromatid exchangeTEST system : Human lymphocytes: <SPAN lang=E BODY

Ecological data

None yet

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

Calculate 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: 1

12. Uncertain number of atomic stereocenters: 0

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

1. Found in tobacco leaves.

Storage method

This product should be sealed and stored dry and below 0℃.

Synthesis method

1. L-lysine is generally supplied to the market as L-lysine hydrochloride [657-27-2]. Free L-lysine is easily deliquesced and prone to yellowing and deterioration due to its free amino groups. , and has a pungent fishy smell, making it difficult to store for a long time. L-lysine hydrochloride is relatively stable, not easy to deliquesce, and easy to store. However, the demand for L-lysine in some uses is also increasing, such as peptide synthesis chemistry, biochemical research, and preparation of lysine derivatives. Free L-lysine can be prepared from L-lysine hydrochloride.

2. Tobacco: BU, 22; FC, 21; can be obtained by hydrolysis and refining of animal protein. It can also be synthesized from benzoyl piperidine.

Purpose

For biochemical research. Medium preparation.

This article is from the Internet, does not represent the position of Toluene diisocyanate reproduced please specify the source.https://www.chemicalchem.com/archives/22093

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