QUALITY STANDARD:
| Item | Supperior class | First class | Qualified | Result |
| Apprearance | white crystaline powder |
| Purity % m/m | 99.7 min | 99.7 min | 99.5 min | 99.8 |
| Melting point | 151.5 min | 151.5 min | 151 min | 152.8 |
| Ammonia solution color, pt-co | 5 max | 5 max | 15 max | 1 |
| Moisture % m/m | 0.20 max | 0.27 max | 0.4 max | 0.17 |
| Ash, mg/kg | 7 max | 10 max | 35 max | 4 |
| Iron, mg/kg | 1.0 max | 1.0 max | 3.0 max | 0.3 |
| Nitric acid, mg/kg | 10.0 max | 10.0 max | 50.0 max | 1.1 |
| Oxidable matter, mg/kg | 60 max | 70 max | --- | 17 |
| Chroma of melts, pt-co | 50 max | --- | --- | 10 |
APPLICATION
Adipic acid is used primarily as a raw material for nylon 66 and engineering plastics, as well as in the production of various ester products, as a raw material for polyurethane elastomers, and as an acidifier for various foods and beverages, which sometimes outperforms citric acid and tartaric acid.
Adipate is also used in medicine, yeast purification, pesticides, adhesives, synthetic leather, synthetic dyes and spices.
China
