Urea for analysis, ACS, molecular biology
Content: 1 KGM
Physical Description:
Solid
Specification: DNases/RNases/Proteases: not detectable
Assay (from N): min. 99.0 %
Assay (Perchl. Ac.): 99.0 - 100.5 %
pH (8 M; H2O; 20°C): 7.5 - 10.5
Heavy metals (as Pb):?max. 0.001 %
Identity (IR): passes test
Melting range: 132 - 135°C
Loss on drying:?max. 0.5 %
Insoluble matter in H2O:?max. 0.005 %
Residue on ignition (as SO4):?max. 0.01 %
Chloride:?max. 0.0005 %
Sulfate:?max. 0.001 %
Fe:?max. 0.0005 %
Zn:?max. 0.0005 %
Sr:?max. 0.0002 %
Co:?max. 0.0005 %
Be:?max. 0.0002 %
Si:?max. 0.0002 %
Sn:?max. 0.0002 %
Cu:?max. 0.0005 %
Al:?max. 0.0002 %
Ni:?max. 0.0005 %
Mn:?max. 0.0005 %
Tl:?max. 0.0002 %
Cd:?max. 0.0005 %
V:?max. 0.0002 %
Mg:?max. 0.0002 %
Mo:?max. 0.0002 %
B:?max. 0.0002 %
Ba:?max. 0.0002 %
In:?max. 0.0002 %
Ag:?max. 0.0002 %
K:?max. 0.0002 %
Pb:?max. 0.0005 %
Pt:?max. 0.0002 %
Ti:?max. 0.0002 %
Cr:?max. 0.0002 %
A (1 cm/8 M in H2O):
260 nm:?max. 0.05
280 nm:?max. 0.02