L-aspartic acid
Chemical name:2-Aminobutanedioic acid
CAS No.:56-84-8
Molecular Formula:C4H7NO4
Molecular Structure:
Description: Aspartic acid (abbreviated as Asp or D) is an α-amino acid with the chemical formula HOOCCH(NH2)CH2COOH. The carboxylate anion, salt, or ester of aspartic acid is known as aspartate. The L-isomer of aspartate is one of the 20 proteinogenic amino acids, i.e., the building blocks of proteins. Its codons are GAU and GAC. Aspartic acid is, together with glutamic acid, classified as an acidic amino acid with a pKa of 3.9, however in a peptide the pKa is highly dependent on the local environment. A pKa as high as 14 is not at all uncommon. Aspartate is pervasive in biosynthesis. As with all amino acids, the presence of acid protons depends on the residue's local chemical environment and the pH of the solution.
Specification:
Test items | Specifications |
Content(%) | 99.0-100.5 |
Transmittance(%) | ≥98.0 |
[α]D20Specific Rotation | +24.8°∽+25.8° |
Loss on drying (%) | ≤0.2 |
Chloride[CL-](%) | ≤0.02 |
Ammonium salt[NH4+](%) | ≤0.02 |
Sulfate[SO42-] | ≤0.02 |
Iron[Fe] PPM | ≤10 |
Heavy metals(pb)PPM | ≤10 |
Arsenic (As) PPM | ≤1 |
Residue on ignition% | ≤0.10 |
Ph | 2.5∽3.5 |
Other amino acids | Not detectable |
Packing & Storage:
