| ≥1 piece |
Specification
|
specification
|
industrial grade
|
Pharmaceutical
grade
|
||
|
ME(60HPMC)
|
MF(65HPMC)
|
MK(75HPMC)
|
||
|
appearance
|
white or off-white powder
|
|||
|
methoxy group
|
28.0-30.0%
|
27.0-30.0%
|
19.0-24.0%
|
19.0-30.0%
|
|
hydroxypropoxy group
|
7.5-12.0%
|
4.0-7.5%
|
4.0-12.0%
|
4.0-12.0%
|
|
gel temperature
|
58-64℃
|
60-68℃
|
70-90℃
|
|
|
PH
|
5.0-7.5
|
4.0-8.0
|
||
|
viscosity
(2%solution,20℃)
|
100000-200000mPa.s
|
0.005-0.075Pa.s
|
||
|
finesses
|
80-100mesh
|
80-100mesh
|
||
|
weight loss on drying
|
≤5.0%
|
≤5.0%
|
||
|
residue on ignition
|
≤4.0%
|
≤1.0%
|
||
|
arsenic
|
/
|
≤0.0002%
|
||
|
heavy metals
|
/
|
≤20ppm
|
||
|
microbial quantity
|
/
|
≤1000pcs/g
|
||
|
mildew quantity
|
/
|
≤100pcs/g
|
||
|
colibacillus
|
/
|
No
|
||