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Merck
CN
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主要文件

1.01566

Millipore

L-Asparagine monohydrate

for biochemistry

别名:

L-Asparagine monohydrate, Asparaginic acid semiamide, Asn

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About This Item

经验公式（希尔记法）:
C4H8N2O3 · xH2O
CAS号:
5794-13-8
分子量:
132.12 (anhydrous basis)
MDL编号:
MFCD00151038
UNSPSC代码:
12352209
EC索引号:
200-735-9
NACRES:
NA.21

质量水平

100

表单

solid

pH值（酸碱度）

4.0-5.5 (20 °C, 20 g/L in H2O)

mp

215-217 °C (decomposes)

溶解性

22 g/L

堆积密度

530 kg/m3

储存温度

2-30°C

SMILES字符串

[N+H3][C@@H](CC(=O)N)C(=O)[O-].O

InChI

1S/C4H8N2O3.H2O/c5-2(4(8)9)1-3(6)7;/h2H,1,5H2,(H2,6,7)(H,8,9);1H2/t2-;/m0./s1

InChI key

RBMGJIZCEWRQES-DKWTVANSSA-N

相关类别

应用


  • Chiral Resolution and Amino Acid Racemase Applications: L-Asparagine monohydrate has been utilized in the immobilization of amino acid racemases complemented with preferential crystallization process for enhanced chiral resolutions (Carneiro et al., 2020).

  • Electro-optical Property Studies: L-Asparagine monohydrate can be used to prepare growth crystals to study its electro-optical properties, particularly in noncentrosymmetric crystal environments. (Shkir et al., 2015).


分析说明

  • Assay (perchloric acid titration, calculated on dried substance): 99.0 - 101.0 %
  • Identity (IR-spectrum): passes test
  • Identity (specific rotation): 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): ≤ 50 ppm
  • Sulfate (SO₄): ≤ 50 ppm
  • As (Arsenic): ≤ 5 ppm
  • Ca (Calcium): ≤ 10 ppm
  • Co (Cobalt): ≤ 5 ppm
  • Fe (Iron): ≤ 5 ppm
  • K (Potassium): ≤ 5 ppm
  • Mg (Magnesium): ≤ 5 ppm
  • Na (Sodium): ≤ 50 ppm
  • Pb (Lead): ≤ 10 ppm
  • Zn (Zinc): ≤ 5 ppm
  • Ninhydrin-positive substances (LC)(Aspartic acid): ≤ 0.5 %
  • Ninhydrin-positive substances (LC)(any other ninhydrin-positive impurity): ≤ 0.3 %
  • Ninhydrin-positive substances (LC) (ammonium (570 nm)): ≤ 0.02 %
  • Ninhydrin-positive substances (LC)(total impurities): ≤ 0.8 %
  • Loss on drying (130 °C, 3 h): 10.5 - 12.5 %

储存分类代码

11 - Combustible Solids

WGK

WGK 1

闪点(°F)

Not applicable

闪点(°C)

Not applicable

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