Urea

Name of indicator

Higher

grade

1^st grade

2^nd grade

Mass fraction of nitrogen in terms of dry matter, %, not less than

46,2

46,2

46,2

Mass fraction of biuret, %, no more

1,4

1,4

1,4

Mass fraction of water, %, not more than:

- hygroscopic;

- general;

0,3

0,5

0,3

0,5

0,3

0,6

Friability, %

100

100

100

Grading, %:

mass fraction of granules size, mm

- from 1 to 4, not less

- from 2 to 4, not less

- less than 1, no more

- residue on the sieve 6 mm

94

70

3

Not available

94

50

5

Not available

94

-

5

Not available