TYPICAL PHYSICAL PROPERTIES
| Name of a parameter | Standard for mark and grade | ||||
| А | B | ||||
| Extra | First | Extra | First | Second | |
| 1. Nitrogen fraction of total mass on dry basise, %, not less |
46,3 | 46,2 | 46,2 | 46,2 | 46,2 |
| 2. Biuret (Ureido Formamide) fraction of total mass, %, no more |
0,6 | 1,4 | 1,4 | 1,4 | 1,4 |
| 3. Loose ammonia fraction of total mass, %, no more, for carbamide |
|||||
| – crystal | 0,01 | 0,01 | – | – | – |
| – prilled | 0,02 | 0,03 | – | – | – |
| 4. Mass share of water, %, no more: |
|||||
| – Method of drying | 0,3 | 0,3 | 0,3 | 0,3 | 0,3 |
| – Method Fishera | 0,6 | 0,6 | 0,5 | 0,5 | 0,6 |
| 5. Friability, % | – | – | 100 | 100 | 100 |
| 6. distribution of sizes, %: | |||||
| – fraction of total mass of granules with size, mm : |
|||||
| § 1 – 4, not less | – | – | 94 | 94 | 94 |
| § 2 – 4, not less | – | – | 70 | 50 | – |
| § less than 1, not less | – | – | 3 | 5 | 5 |
| § 6-mm sieve residue, no more |
– | – | Absence | ||
| 7. Static hardness of granules, kgf/granule, not less |
– | – | 0,7 | 0,5 | 0,3 |





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