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1 . Resistance to salting : Hydroxypropyl methyl cellulose (HPMC) is a nonionic cellulose ether and it is not a polyelectrolyte . The aqueous solution of Hydroxypropyl methyl cellulose (HPMC) is comparatively stable even in the presence of metal salts or organic electrolytes . However, when the concentration of electrolytes exceeds a certain limit, gelation and precipitation may result .
2 . Surface activity : An aqueous solution of Hydroxypropyl methyl cellulose (HPMC) has a high surface activity and functions as a protective colloid agent , emulsion stabilizer and dispersant .
3 . Thermal gelation :An aqueous solution of Hydroxypropyl methyl cellulose (HPMC) will gel or precipitate when heated to a certain temperature , but it reverts to the original solution state on subsequent cooling . The temperature at which gelation or precipitation occur depends on the type of HPMC , its concentration and the rate of heating .
4 . pH stability :The viscosity of an aqueous solution of HPMC is hardly affected by acid or alkali , and the product can develop an original viscosity in the range of 3 . 0~11 . 0 . Therefore , the solution viscosity tends to keep stable during prolonged storage .
5. Water retention :Hydroxypropyl methyl cellulose (HPMC) is a high effective water retention agent . Its pharmaceutical grade product can be widely used in food, cosmetics and many other fields .
6 . Film forming :Hydroxypropyl methyl cellulose (HPMC) provides a strong , flexible and transparent film having a good barrier property against oil and grease .In food application , this property is often utilized for water retention and oil adsorption .
7 . Cohesiveness (Binding property) : Hydroxypropyl methyl cellulose (HPMC) , as a high performance binder, can also be used for molding food and medicine .
| Item | Specifications | |||
| HPMC | ||||
| F | E | J | K | |
Loss on drying, % | 5.0MAX | |||
| Residue on ignition,% | 1.5MAX | |||
| Heavy metals,ppm | 20MAX | |||
| PH | 5.0~8.0 | |||
| Bacterium | 1000cfu/gram MAX | |||
| Mold | 100cfu/gram MAX | |||
| Viscosity (2% solution),mPa.s | refer to Table 2 | |||
| Level | Specific range (mPa.s) | Level | Specific range (mPa.s) |
| 5 | 4~9 | 8000 | 6000~9000 |
| 15 | 10~20 | 10000 | 9000~12000 |
| 25 | 20~30 | 15000 | 12000~18000 |
| 50 | 40~60 | 20000 | 18000~30000 |
| 100 | 80~120 | 40000 | 30000~50000 |
| 400 | 300~500 | 75000 | 50000~85000 |
| 800 | 600~900 | 100000 | 85000~130000 |
| 1500 | 1000~2000 | 150000 | 130000~180000 |
| 4000 | 3000~5600 | 200000 | ≥180000 |
Hydroxypropyl methyl cellulose (HPMC) is used as adhesive, solutizer in tablet, film-forming reagents in pharmaceutical coating,delayed-release and controlled-release tablets or capsules, thickener and water-binding agent in liquid formulation, component in eye drop.
With pallet 25kg/drum 25kg/bag
