Shaanxi Shangnan County Dongzheng Chemical Co., Ltd. 
1. Appearance
Orange-red crystalline granules or powder.
2. Physical and Chemical Properties
Soluble in water, insoluble in ethanol, with strong oxidizing properties.
3. Applications
It is used as an analytical reagent in laboratories.
4. Product Information
English Name: Reagent Potassium Dichromate
CAS No.: 7778-50-9
Molecular Formula: K₂Cr₂O₇
Molecular Weight: 294.18
5. Product Category and Quality Standards
Standard: GB/T 642-1999
Quality Index | Guaranteed Reagent (GR) | Analytical Reagent (AR) | Chemically Pure (CP) |
Potassium Dichromate (as K₂Cr₂O₇), w/% ≥ | 99.80 | 99.80 | 99.50 |
| Water-insoluble matter, w/% ≤ | 0.003 | 0.005 | 0.01 |
| Loss on drying, w/% ≤ | 0.05 | 0.05 | -- |
| Chlorides (as Cl), w/% ≤ | 0.001 | 0.002 | 0.005 |
| Sulfates (as SO₄), w/% ≤ | 0.005 | 0.01 | 0.02 |
Sodium (as Na), w/% ≤ | 0.02 | 0.05 | 0.10 |
| Calcium (as Ca), w/% ≤ | 0.002 | 0.002 | 0.01 |
| Iron (as Fe), w/% ≤ | 0.001 | 0.002 | 0.005 |
| Copper (as Cu), w/% ≤ | 0.001 | -- | -- |
| Lead (as Pb), w/% ≤ | 0.005 | -- | -- |
6. Packaging
25kg paper-plastic composite bag or customer specifications.
7. Storage
Store in a cool, dry, and well-ventilated place, protect against moisture, heat, and impact, and store remotely from flammables. Shall not be co-stored with foodstuffs or strong reducing agents. In the event of leakage incident, immediately treat with 10% sulfuric acid solution followed by ferrous sulfate reduction and neutralize residual liquid with calcium hydroxide slurry.
