CAS number：
Molecular formula：
molecular weight：
Chemical structure：
| Product | Hydroxypropyl Methylcellulose Phthalate HP55 | |
| Shelf life | 2 years | |
| Tests | Standard USP32 | Result |
| Appearance | White or almost white granular solid,odorless,tasteless | White powder |
| Identification | Complies | Conforms |
| Viscosity | 32-48mpa.s | 43mpa.s |
| Loss on drying | ≤5.0% | 3.4% |
| Residue on ignition | ≤0.2% | 0.02% |
| Chlorides | ≤0.07% | ＜0.07 |
| Heavy metals | ≤10PPM | ＜10PPM |
| Free Phthalic Acid | ≤1.0% | 0.4% |
| Esterification percent | 27.0-35.0% | 34.3% |
| Conclusion | It conforms to USP32. | |
