|
 Products
Potassium ferrocyanide
( Yellow
prussiate of potash )
Synonyms:
Yellow
prussiate of potash; Potassium hexacyanoferrate(II); Potassium
prussiate yellow; Ferrocianuro de potasio;
Kaliumhexacyanoferrate; Hexacianoferratos de potasio;
...
Molecular formula: K4 Fe (CN )6 .
3H2O
Molecular weight: 422.39
CAS No.: 14459-95-1
(Trihydrate); 13943-58-3 (Anhydrous)
EINECS No.:
237-722-2 H.S.Code:
28372000
Properties: Yellow
or Lemon yellow crystal or powder, soluble in water, insoluble in
ethanol
INDUSTRY
GRADE (TECH GRADE) / FOOD GRADE
|
Items
|
Specifications |
Tech / Industry
Grade |
Food
Grade |
E536 |
Purity [K4Fe(CN )6 .
3H2O] % ≥ |
99.0 |
99.0 |
99.0 |
Chloride [ Cl- ]
% ≤ |
0.2 |
0.2 |
0.2 |
Water insoluble matter
% ≤ |
0.01 |
0.01 |
0.03 |
Moisture
% ≤ |
0.5 |
0.3 |
0.5 |
Sodium [ Na+ ] % ≤ |
0.3 |
0.2 |
|
| Hexacyanoferrate (Ⅲ) acid salt
% ≤ |
|
Passed |
Not detectable
|
Cyanide [ CN- ]
% ≤ |
|
Passed |
Not detectable |
Arsenic [ As ]
% ≤ |
|
0.0001 |
|
|
Sulphate [ SO42- ] % ≤ |
|
|
0.1 |
Lead [ Pb ]
mg/kg ≤ |
|
|
5 |
REAGENT
GRADE / EXTRA PURE
GRADE
|
Items
|
Specifications |
| ACS Grade |
CP Grade |
AR Grade |
Extra Pure Grade |
Purity [K4Fe(CN )6 .
3H2O] % ≥ |
98.5～102.0 |
99.0 |
99.50 |
99.50 |
Chloride [ Cl- ] % ≤ |
0.01 |
0.02 |
0.005 |
0.003 |
Sulphate [ SO42- ] % ≤ |
0.01 |
0.01 |
0.005 |
0.005 |
Water insoluble matter % ≤ |
0.005 |
0.01 |
0.005 |
0.005 |
Sodium [ Na+ ] % ≤ |
— |
— |
0.02 |
0.005 |
Note: special specifications are available for
customers with special requirements
Application
:
- Food grade is mainly used as food
additive, such as: anti-caking agent in table
salt or used to remove heavy metal ions (iron, copper, zinc, etc. ) from wine, soy
protein...
- Industry grade is mainly used to produce iron blue and potassium
ferricyanide, or used in paint,
printing ink, coloring matter, leather
industry, pharmacy,
heat treatment
of metal, metallurgy and other industries.
- Chemical reagent (Extra Pure) grade is mainly used in high-tech fields such as microelectronics, aerospace.
Packing
: In
kraft paper bags / plastic woven bags / plywood drums / boxes of 25/50
kgs net, also can be 500kgs / 800kgs /
1000kgs big bags
Transportation & storage: kept
in dry, dark and ventilating place; no mix with acid.
|
