پروتامین سولفات 98% برای بیوشیمی کد 110123 مرک آلمان





Protamine sulphate
for biochemistry
Synonym(s): Protamine sulfate, Salmine sulfate



Analysis Note

Nitrogen content (Kjeldahl; calc.on dried substance): 22.5 - 25.5 %
Assay of sulfate (gravimetrically; calc. on dried substance): 16 - 22 %
Identity (IR-spectrum): passes test
Appearance: white to almost white, crystalline powder
Appearance of solution (5 g/l; water): clear to almost clear, colorless to slightly yellow
Absorbance (260-280 nm, 10 g/l, 1 cm, water): ≤ 0.1
Spec. rotation (α 20/D, 10 g/l, hydrochloric acid 0.1 mol/l, calc. on dried substance): -65 to -85
Fe (Iron): ≤ 0.001 %
Hg (Mercury): ≤ 0.001 %
Heavy metals (as Pb): ≤ 0.002 %
Loss on drying (105 °C; 3 h): ≤ 5 %