Hydroxy Propyl Methyl Cellulose (HPMC)
Item
Range of Viscosity (Mpa.s)
Methoxyl Content (wt%)
28-30
27-30
19-24
Very low
5
3-7
Hydrooxypropoxyl Content (wt%)
7-12
4-7.5
4-12
10
8-12
Gelling Temperature (℃)
58-64
62-68
70-90
15
13-18
Loss on drying (wt%)
5 max
Low
25
20-30
Ash
1 max
50
40-60
PH (25℃)
4-8
100
80-120
Chloride (NaCl)
0.2 max
High
4000
3500-5600
Arsenic (ppm)
2
12000
10000-14000
Heavy metal (ppm)
20
20000
17000-22000
Apparent Viscosity (2% solution, 20℃, mpa.s)
5-100000
Very High
25000
27000-32000
30000
40000
38000-42000
100000
80000-100000