Iron content | Na2S(%) | Na2SO3(%) | Na2S2O3(%) | Na2CO3(%) | Water Insoluble(%) | color |
1500ppm Max | 60.0 Min | 0.2 Max | 0.2 Max | 5.0 Max | 0.4 Max | red |
150ppm Max | 60.0 Min | 0.2 Max | 0.2 Max | 2.0 Max | 0.2 Max | |
80ppm Max | 60.0 Min | 0.2 Max | 0.2 Max | 2.0 Max | 0.2 Max | yellow |
50ppm Max | 60.0 Min | 0.2 Max | 0.2 Max | 2.0 Max | 0.2 Max | |
30ppm Max | 60.0 Min | 0.2 Max | 0.2 Max | 2.0 Max | 0.05 Max | |
20ppm Max | 60.0 Min | 0.2 Max | 0.2 Max | 2.0 Max | 0.03 Max | |
15ppm Max | 60.0 Min | 0.2 Max | 0.18 Max | 1.8 Max | 0.03 Max | |
10ppm Max | 60.0 Min | 0.2 Max | 0.18 Max | 1.8 Max | 0.03 Max | |
5ppm Max | 60.0 Min | 0.2 Max | 0.18 Max | 1.7 Max | 0.02 Max |
ITEM | 85% | 90% |
Color Index(Platinum-Cobalt) | 20 | 10 |
Purity | 85% min | 90%min |
Cl | 0.005% max | 0.003%max |
SO4 | 0.002% max | 0.001%max |
Fe | 0.0005% max | 0.0001%max |
Residue after evaporation | 0.02% max | 0.006%max |
TESTING PROJECT | INDEX |
Main content % | 98.0% min |
NaOH % | 0.5% max |
Na2CO3% | 1% max |
NaCl % | 0.2% max |
Water | 1.0% max |
Oxalic Acid Content | 99.6%Min |
Sulphate | 0.08%Max |
Heavy Metals(Pb2+) | 0.001%Max |
Ferrous(Fe3+) | 0.0015%Max |
Chloride(Cl-) | 0.003%Max |
Ignition Residue | 0.08%Max |
S.No | Description | Units | Specifications |
1 | Appearance | -- | Fine free flowing, Dark green color powder |
2 | Bulk Density | g/ml | 0.8 g/ml |
S.No | Description | Units | Specifications |
1 | Chromium Oxide Content as Cr2O3 | % Min | 26 |
2 | Basicity | % | 33 |
3 | pH (10% solution) | -- | 3.0 |
4 | Chromium (VI) | ppm | Nil |
5 | Moisture content | % Max | 6 |
6 | Water Insoluble matter | % Max | 0.1 |
7 | Fe as Fe2O3 | % Max | 0.1 |
Index | 90% | 88% | 85% | Food Additive |
Na2S2O4 | ≥90% | ≥88% | ≥85% | ≥85% |
Fe | ≤20ppm | ≤20ppm | ≤20ppm | ≤20ppm |
ZincZn | ≤1ppm | ≤1ppm | ≤1ppm | ≤1ppm |
Other heavy metal calculated as Pb | ≤1ppm | ≤1ppm | ≤1ppm | ≤1ppm |
Water Insolubles | ≤0.05% | ≤0.05% | ≤0.05% | ≤0.05% |
Shelf Life(month) | 12 | 12 | 12 | 12 |
Molecular Weight | C44H32N13Na3O11S3 |
Products name | Direct Black |
Cas No | 6473-13-8 |
H.S. Code | 3204140000 |
Appearance | Black Powder |
Strength | 600% 1200% |
Shade | Reddish,Greenish tone |
Moisture% | 1.5 Max |
Properties | It is very soluble in water and alcohol |
Use | Dyeing Cotton and Viscose Fabric.Also can dying Sik and Nylon Fabric. |
Packages | 25KG Iron Drums , Cartons and Woven bags |