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Parameters of 13Ñ-urea

TU 2636-002-22876655-2004

 
Parameters
Specifications
pure for analysis (pfa)
pure
1.
Carbon-13 content, %    
 
grade À
93-99
93-99
grade B
90-93
90-93
grade C
80-90
80-90
grade D
30-80
30-80
2.
 Assay (ÑH4ON2), %, no less than
99
99
3.
Melting point, °Ñ
132.7
+1.0
132.7
 +1.0
-1.5 -1.5
4.
Insoluble matter , %, no more than
0.003
0.003
5.
 Residue on ignition (in sufate form), %, no more than
0.01
0.1
6.
 Sulfates (SO4), %. no more than
0.001
0.01
7.
 Chlorides (CI), %, no more than
0.0005
0.007
8.
 Ferrum (Fe), %, no more than
0.0009
-
9.
 Heavy metals (Pb), %, no more than
0.0002
0.001
10.
 Ammonia (NH3), %, no more than
0.0015
0.015
11.
Biuret, %, no more than
0.005
0.05

 

 

 
2004