| Standard | Grade1 | Grade2 | Grade3 | Analysis Method |
|---|---|---|---|---|
| Iodine adsorption(mg/g) | 950 min | 950 min | 1,200 min | JIS K 1474 |
| Methylene blue adsorption(ml/g) | 160 min | 160 min | 200 min | JIS K 1474 |
| Loss on drying(%) | 5 max | 5 max | 5 max | JIS K 1474 |
| Ingnition residue(%) | 5 max | 10 max | 10 max | JIS K 1474 |
| pH | 9~12 | 9~12 | 9~12 | JWWA K 113 |
| Size(200mesh pass)(%) | 90 min | 90 min | 90 min | JIS K 1474 |