L(+)-Asparagine monohydrate ≥99.0% (dry basis) for biochemistry pH 4.0 - 5.5 (20 g/l, H₂O, 20 °C), Millipore®
: Merck
: L-Asparagine monohydrate, H-Asn-OH·H₂O, (S)-(+)-Asparagine monohydrate, (S)-2,4-Diamino-4-oxobutanoic acid hydrate, H-Asn-OH.H2O
:5794-13-8
:
:C₄H₈N₂O₃·1H₂O
:MFCD00151038
:1.567 g/cm³ (20 °C)
:150.13 g/mol
:215…217 °C
:14,00837
:M-Clarity™ quality level = MQ100
:Ambient
:200-735-9
- Environmentally Preferable:
- Assay (perchloric acid titration, calculated on dried substance):≥ 99.0 %
- Identity (IR-spectrum):passes test
- Appearance:white to almost white crystalline powder or colorless crystals
- Appearance of solution (20 g/l, CO₂-free water):clear and colorless
- Spec. rotation (α 20/D, 100 g/l, hydrochloric acid 3 mol/l, calc. on dried substance):+33.7 to +36.0
- Chloride (Cl):≤ 0.02 %
- Sulphate (SO₄):≤ 0.02 %
- 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 %
- Aspartic acid:≤ 0.5 %
- other foreign amino acids:≤ 0.3 %
- Other ninhydrine positive substances:≤ 0.1 %
- Loss on drying (130 °C, 3 h):10.5 - 12.5 %
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