Product Description
Chromium(III) fluoride (CAS 7788-97-8, CrF₃), also called chromic trifluoride, is a green crystalline inorganic salt supplied as anhydrous powder or trihydrate. It is a specialized chromium(III) source used as a mordant in textile dyeing, a fluorination/halogenation catalyst, and a corrosion-inhibiting pigment in anti-rust primers.
Key features:
Green crystalline solid, stable under normal conditions.
Available as anhydrous CrF₃ and trihydrate CrF₃·3H₂O to match process needs.
Good mordanting affinity for wool and polyamide fibers.
Active catalyst for fluorination and halogenation reactions.
Effective corrosion inhibitor in chromium-containing anti-rust paints.
Used in marble hardening, dye fixing and specialty chemical synthesis.
Product Parameters
| Item | Specification |
|---|---|
| Product Name | Chromium(III) Fluoride |
| CAS No. | 7788-97-8 |
| Synonyms | Chromic trifluoride, Chrome fluoride |
| Molecular Formula | CrF₃ (anhydrous) / CrF₃·3H₂O (trihydrate) |
| Molecular Weight | 108.99 (anhydrous) |
| Appearance | Green crystalline powder |
| Purity | ≥ 98% |
| Water Insoluble Matter | ≤ 0.5% |
| Iron (Fe) | ≤ 0.1% |
| Solubility | Slightly soluble in water; soluble in hot HF |
| pH | Acidic solution |
| Packaging | 25 kg fiber drum / bag |
Product Application
Chromium(III) fluoride is a specialty chromium salt mainly used in textile dyeing, catalyst preparation, anti-corrosion coatings and stone treatment.
In textiles, it is used as a mordant for wool and polyamide dyeing, improving the fastness and depth of chrome-complex and acid dyes. It is also used in vigoureux printing and wool anti-moth finishing.
In catalysts and fluorochemistry, it serves as a catalyst or catalyst precursor for halogenation and fluorination reactions, and as a chromium source for preparing other chromium(III) compounds and chromium-based catalysts.
In coatings and metal treatment, it is incorporated into anti-rust primers and corrosion-inhibiting paints where its low solubility and chromium(III) passivation film give long-term protection to steel.
In stone, paper and other specialties, it is used as a hardening and coloring agent for marble, in paper-coating formulations, and as a laboratory reagent.
