Sulfurea

Name of indicator

Higher

grade

1^st grade

2^nd grade

The total mass fraction of nitrate and ammonium

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

34.4

34.4

34.0

Mass fraction of water, %, not more than:

- with sulfate and sulfate-phosphate additives

- with additions of calcium and magnesium nitrates

0.2

0.3

0.2

0.3

0.3

0.3

Mass fraction of substances insoluble in 10%

nitric acid solution, %, no more

Not the norm.

Not the norm.

Not the norm.

Grading:

- from 1 to 3 mm, %, not less

- from 1 to 4 mm, % not less.

- from 2 to 4 mm, %, not less

- less | mm, %, no more

- more than 6 mm, %

Not the norm.

95

80

3

0.0

Not the norm.

95

50

3

0.0

Not the norm.

95

Not the norm.

4

0.0

pH 10% aqueous solution, not less than

5.5

5.5

5.5

Static strength, granule, N/granule (kg/granule)

at least with additions of calcium and magnesium nitrates

8 (0.8)

7 (0.7)

5 (0.5)

Friability, %, not less

100

100

100