D-alanine
Structural formula
| Business number | 04AF |
|---|---|
| Molecular formula | C3H7NO2 |
| Molecular weight | 89.09 |
| label |
D-aminopropionic acid, L-A-Alanine, alanine, D-alanine, D-Alanine, D-alpha-aminopropionic acid, D-alpha-alanine, D-Oil amino acid, (R)-Alanine, Ba 2776, D-2-Aminopropionic acid, D-Alpha-Alanine, D-Alanine, H-D-Ala-OH, Flavoring agents and aroma enhancers. Can also be used as an additive in cosmetics |
Numbering system
CAS number:338-69-2
MDL number:MFCD00008077
EINECS number:206-418-1
RTECS number:24891121
BRN number:1720249
PubChem ID:None
Physical property data
1. Properties: Colorless crystal.
2. Density (g/mL, 25/4℃): Undetermined
3. Relative vapor density (g/mL, air=1): Undetermined
4. Melting point (ºC): 297
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, C=2, in hydrochloric acid): -14.6
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. Log value of oil-water (octanol/water) partition coefficient: Undetermined
17. Explosion upper limit (%, V/V): Undetermined
18. Explosion lower limit (%, V/V): Undetermined
19. Solubility: Easily soluble in Water (165%, 25℃), slightly soluble in ethanol (02% in 80% cold alcohol), insoluble in ether or acetone.
Toxicological data
2. Toxicological data:
Acute toxicity: Not available.
Ecological data
3. Ecological data:
1. Other harmful effects: This substance may be harmful to the environment, and special attention should be paid to water bodies.
Molecular structure data
Compute chemical data
1. Reference value for hydrophobic parameter calculation (XlogP): None
2. Number of hydrogen bond donors: 2
3. Number of hydrogen bond acceptors: 3
4. Number of rotatable chemical bonds: 1
5. Number of tautomers: none
6. Topological molecule polar surface area 63.3
7. Number of heavy atoms: 6
8. Surface charge: 0
9. Complexity: 61.8
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
None yet
Storage method
Sealed packaging in brown glass bottles. Store in a cool, dry place away from light. Its aqueous solution is alkaline, so contact with eyes and skin should be avoided.
Synthesis method
① It is refined from L-aspartic acid as raw material after enzymatic hydrolysis by β-decarboxylase.
② It is separated by hydrolysis or enzymatic hydrolysis of proteins containing more L-alanine, such as silk, gelatin, and corn gluten.
Laspartic acid immobilized enzyme column ↓Enzyme preparation← strain IAM vacuum concentration frozen crystallization
Centrifugal separation and dry product
Purpose
1. Widely used in pharmaceutical, food, chemical and other industries. In the pharmaceutical industry, it is an important raw material for the synthesis of vitamin B6 and a component of amino acid infusion. In the food industry, it can be used as a flavoring agent and aroma enhancer. It can also be used as an additive in cosmetics.
2. Biochemical research, used for preparation of tissue culture media, measurement of liver function, etc.