Chemical Name: Tannic acid
Structural formula:
Molecular formula: C76H52O46 Molecular weight: 1701.2 CAS No.: 1401-55-4
Production Capacity：300T
Specification:(Enterprise standard of China)
|
quality specification |
Standard value |
||
|
High pure grade |
Industrial grade |
dye grade |
|
|
operative norm |
manufacturer'sstandard |
LY/T1300-2005 |
manufacturer's standard |
|
Appearance: |
light yellow to brown powder |
light yellow to brown powder |
light yellow to brown powder |
|
Content （%） ≥ |
98.0 |
81.0 |
86.0 |
|
loss of dryness （%） ≤ |
9.0 |
9.0 |
9.0 |
|
insolubles in water (%) ≤ |
0.1 |
0.6 |
|
|
transparency |
qualified |
qualified |
|
|
Total color (Lovibond Tintometer unit)≤ |
1.2 |
2.0 |
2.0 |
|
Residue of ignition（%≤ |
0.1 |
1.0 |
|
|
gallic acid (%) ≤ |
2.0 |
7.0 |
|
|
Heavy metal(Pt) (%) ≤ |
10 |
|
|
|
Arsennic (%) ≤ |
5 |
|
|
|
Pt (%) ≤ |
3 |
|
|
|
Hg (%) ≤ |
1 |
|
|
Packing：Paper drum lined plastic bag
Gross weight ：28kg Net weight：25kg
Storage：Seal and keep away light 。
