Merck 1043510025 组氨酸,生物化学适用 (C₆H₉N₃O₂, Glass bottle 25g)
制造商: Merck Model: 1043510025 - 报价要求
- 报价要求
Price (exclude VAT) 1,480,050 VND Price (include VAT) 1,628,055 VND
CAS number: 71-00-1
EC number: 200-745-3
Hill Formula: C₆H₉N₃O₂
Molar Mass: 155.16 g/mol
Assay (acidimetric, calculated on dried substance): 99.0 - 101.0 %
Identity (IR-spectrum): passes test
Appearance: white to almost white, fine-crystalline powder or colorless crystals
Appearance of solution (50 g/l; water): clear and colorless
Spec. rotation (α 20/D, 110 g/l, hydrochloric acid 120 g/l, calc. on dried substance): +11.4 to +12.4
Chloride (Cl): ≤ 200 ppm
Sulfate (SO₄): ≤ 200 ppm
Heavy metals (as Pb): ≤ 10 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): ≤ 100 ppm
Zn (Zinc): ≤ 5 ppm
Ninhydrin-positive substances (LC) (any ninhydrin-positive impurity): ≤ 0.2 %
Ninhydrin-positive substances (LC) (ammonium (570 nm)): ≤ 0.02 %
Ninhydrin-positive substances (LC) (total impurities): ≤ 0.5 %
Loss on drying (105 °C; 3 h): ≤ 0.2 %
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