|
Standard:GB 2440-2001
Uses: Mainly used as fertilizer and material of resin, plastic, coating, drug.
Appearance: white or light color granular
Technical requirements:
| Index name |
For industry |
For agriculture |
| Top-grade |
First grade |
Qualified product |
Top-grade |
First grade |
Qualified product |
| N(as dry) ≥ |
46.5 |
46.3 |
46.3 |
46.4 |
46.2 |
46.0 |
| biuret ≤ |
0.5 |
0.9 |
1.0 |
0.9 |
1.0 |
1.5 |
| H2O ≤ |
0.3 |
0.5 |
0.7 |
0.4 |
0.5 |
1.0 |
| Fe ≤ |
0.0005 |
0.0005 |
0.0010 |
-- |
-- |
-- |
| Alkalinity(as NH3) ≤ |
0.01 |
0.02 |
0.03 |
-- |
-- |
-- |
| Sulfate (as SO42-) ≤ |
0.005 |
0.010 |
0.020 |
-- |
-- |
-- |
| Water insoluble matter ≤ |
0.005 |
0.010 |
0.040 |
-- |
-- |
-- |
| methylene bisurea(as HCHO), % ≤ |
-- |
-- |
-- |
0.6 |
0.6 |
0.6 |
| Granularity |
d0.85mm-2.80mm, % ≥ |
90 |
90 |
90 |
93 |
90 |
90 |
| d1.18mm-3.35mm, % ≥ |
| d2.00mm-4.75mm, % ≥ |
| d4.00mm-8.00mm, % ≥ |
Remark:1, if the production of Carbamide does not need formaldehyde, the test of methylene bisurea is unnecessary.
2, Indexes of Granularity is one of 4 items, it will be signed on the packing.
* Carbamide has got the standard authentication of Zhejiang province in 1990(Γ OCT2081-75 Carbamide ), No.: ZBCZ10012; We passed the recheck in 1998.
* Carbamide was approved as the famous product of Zhejiang province in 1993, 1996, 1999 and 2002. It was one of first inspection-exemption products of China in 2001.
Molecular formula:CO(NH2)2
Relative molecular mass :60.055
Properties: Carbamide is white or light color granule.
Packing & Storage: film bag lined plastic woven bag; load gently, Do not mix with oxidant, food chemicals. Avoid insolation, rain and high temp..
|
