Meet the China Pharmacopoeia NF standard, United States Pharmacopoeia USP standard, the European Pharmacopoeia EP standard. 1. Physical & chemical properties Items | Specification | | HPMC | Methoxyl content, MeO % | | 19.0~30.0 | Hydroxy propyl content, HPO % | - | 4.0~12.0 | Residue on ignition,% | | 1.5 | Loss on drying,% | | PH | | Water insoluble substance,% | | heavy metals,% | | Arsenic salt,% | |
2 viscosity specification Spec. | viscosity range mPa.s | | Spec. | viscosity range mPa.s | 5 | 4~7 | 8000 | 6400~9600 | 15 | 11~21 | 10000 | 8000~12000 | 25 | 18~35 | 15000 | 12000~18000 | 50 | 38~70 | 20000 | 16000~24000 | 100 | 80~120 | 40000 | 32000~48000 | 400 | 320~480 | 75000 | 60000~90000 | 800 | 640~960 | 100000 | 80000~120000 | 1500 | 1200~1800 | 150000 | 120000~180000 | 4000 | 3200~4800 | 200000 | ≥180000 | Note: Viscosity values above are of 2% water solution detected by NDJ viscometer, 20°C. |
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