ISO 22241 standard scr urea prilled

Item

standard

test result

Urea Assay (wt %)

98.0 min

99.1

Granulate size

0.85-2.80mm

94%

Moisture (wt %)

0.5 max

0.34

Nitrogen(wt %)

46

46.4

Biuret (wt %)

1.0 max

0.78

Aldehydes (ppm)

5 max

3

Free Ammonium (wt %)

0.01

0.01

Insolubles (ppm)

20

17

Fe (mg/kg)

0.5 max

Less than 0.2

Al (mg/kg)

0.5max

Less than 0.2

Cu (mg/kg)

0.5 max

Less than 0.2

Zn (mg/kg)

0.5 max

Less than 0.2

Cr (mg/kg)

0.5 max

Less than 0.2

Ni (mg/kg)

0.5 max

Less than 0.2

Mg (mg/kg)

0.5 max

Less than 0.2

Na (mg/kg)

0.5max

Less than 0.2

K (mg/kg)

0.5 max

Less than 0.2

Ash (ppm)

100 max.

Less than 10

Phosphate(ppm)

0.5 max

Less than 0.2

Heavy Metal( ppm)

0.5

0.4

Additive

NONE

NONE

pH (10 wt% solution)

9.0 ~ 10.0

9.48