1.00126

L-Aspartic acid

for biochemistry

• Synonym(s): L-Aspartic acid, L-α-Aminosuccinic acid, L-αlpha-Aminosuccinic acid, Asp
• Empirical Formula (Hill Notation): C₄H₇NO₄
• CAS Number: 56-84-8
• Molecular Weight: 133.10
• MDL number: MFCD00002616
• UNSPSC Code: 12352209
• EC Index Number: 200-291-6
• NACRES: NA.21

Properties

• Quality Level: 100
• form: solid
• pH: 2.5-3.5 (20 °C, 4 g/L in H₂O)
• mp: 269-271 °C (decomposition)
• solubility: 4 g/L
• bulk density: 430 kg/m³
• storage temp.: 2-30°C
• InChI: 1S/C4H7NO4/c5-2(4(8)9)1-3(6)7/h2H,1,5H2,(H,6,7)(H,8,9)
• InChI key: CKLJMWTZIZZHCS-UHFFFAOYSA-N

Description

Analysis Note

Assay (alkalimetric, calculated on dried substance): ≥ 99.0 %
Identity (IR-spectrum): passes test
Appearance: white to almost white crystalline powder or colorless crystals
Appearance of solution (0.5 mol/l, hydrochloric acid 1 mol/l): clear and colorless
Spec. rotation (α 20/D, 50 g/l, hydrochloric acid 1 mol/l, calc. on dried substance): +25.3 to +26.3
UV-Absorption (260 nm, 0.5 mol/l, 1 cm, hydrochloric acid 1 mol/l): ≤ 0.25
UV-Absorption (280 nm, 0.5 mol/l, 1 cm, hydrochloric acid 1 mol/l): ≤ 0.20
Chloride (Cl): ≤ 0.02 %
Sulfate (SO₄): ≤ 0.01 %
Heavy metals (as Pb): ≤ 0.001 %
As (Arsenic): ≤ 0.0005 %
Ca (Calcium): ≤ 0.001 %
Co (Cobalt): ≤ 0.0005 %
Fe (Iron): ≤ 0.0005 %
K (Potassium): ≤ 0.0005 %
Mg (Magnesium): ≤ 0.0005 %
Na (Sodium): ≤ 0.005 %
NH₄ (Ammonium): ≤ 0.01 %
Zn (Zinc): ≤ 0.0005 %
Foreign amino acids: ≤ 0.3 %
Other ninhydrine positive substances: ≤ 0.1 %
Loss on drying (105 °C; 3 h): ≤ 0.3 %

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable