L(+)-Asparagine monohydrate ≥99.0% (dry basis) for biochemistry pH 4.0 - 5.5 (20 g/l, H₂O, 20 °C), Millipore®

Supplier: Merck

Synonyms: L-Asparagine monohydrate, H-Asn-OH·H₂O, (S)-(+)-Asparagine monohydrate, (S)-2,4-Diamino-4-oxobutanoic acid hydrate, H-Asn-OH.H2O

M-Clarity™ quality level = MQ100

1.01566.0100 1.01566.1000 1.01566.9010
1.01566.0100EA 75.1 GBP
1.01566.0100 1.01566.1000 1.01566.9010
L(+)-Asparagine monohydrate ≥99.0% (dry basis) for biochemistry pH 4.0 - 5.5 (20 g/l, H₂O, 20 °C), Millipore®
L(+)-Asparagine monohydrate
Formula: C₄H₈N₂O₃·1H₂O
MW: 150,13 g/mol
Melting Pt: 215…217 °C
Density: 1,567 g/cm³ (20 °C)
Storage Temperature: Ambient
MDL Number: MFCD00151038
CAS Number: 5794-13-8
EINECS: 200-735-9
Merck Index: 14,00837

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Specification Test Results

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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