Shaanxi Shangnan County Dongzheng Chemical Co., Ltd. 
I. Appearance
Orange-red monoclinic crystals or powder.
II. Physical and Chemical Properties
It is a strong oxidizer, soluble in water and ethanol, and may cause combustion or explosion upon contact, friction, or impact with organic materials.
III. Applications
It is used as an analytical reagent, mordant, synthetic flavoring agent, photographic plate making, and as a critical precursor in the production of high-purity chrome oxide green.
IV. Product Information
English Name: Reagent Ammonium Dichromate
CAS Number: 7789-09-5
Molecular Formula: (NH₄)₂Cr₂O₇
Molecular Weight: 252.07
V. Product Category and Quality Standards
Standard: GB/T 656-2003
Quality Index | Analytical Reagent (AR) | Chemically Pure (CP) |
| Ammonium Dichromate (as (NH₄)₂Cr₂O₇), w/% ≥ | 99.00 | 99.00 |
| Water-insoluble matter, w/% ≤ | 0.002 | 0.005 |
| Chlorides (as Cl), w/% ≤ | 0.002 | 0.005 |
Sulfates (as SO₄), w/% ≤ | 0.01 | 0.03 |
| Sodium (as Na), w/% ≤ | 0.005 | 0.05 |
Potassium (as K), w/% ≤ | 0.07 | 0.16 |
| Calcium (as Ca), w/% ≤ | 0.002 | 0.01 |
Iron (as Fe), w/% ≤ | 0.002 | 0.005 |
VI. Packaging
25kg reinforced woven poly bags with polyethylene liner.
VII. Storage
During storage and transportation, protect from moisture, heat and impact, keep away from flammable materials, and ensure strict segregation from foodstuffs and strong reducing agents to prevent hazardous reactions.
