Basic Chromium Sulphate
Chromium hydroxide sulfate, BCS, Chrome Tan
- CAS
- 39380-78-4
- EC
- 235-337-6
- Sectors
- Textiles, Leather & Paper, Automotive
Basic Chromium Sulphate (CAS 39380-78-4) is a chromium salt supplied as a green crystalline solid, defined by its chrome content and basicity, that serves as the industry-standard tanning agent for leather production and as a mordant for dyeing wool and synthetic fibers. It features excellent tanning power and provides leather with superior hydrothermal stability.
The product is characterized by its chrome content and basicity, ensuring optimal penetration into hide fibers. It is essential for the "blue-wet" process in automotive leather production.
This chemical also finds use in the textile industry as a mordant for dyeing wool and synthetics. It ensures deep color penetration and high resistance to fading.
Typical Properties
| Molecular formula | CrHO5S |
|---|---|
| Molecular weight | 343.208 g/mol |
| Form | Solid |
| Color | Green Crystalline |
| Odor | Odorless |
| Melting point | 90°C |
| Density | 1.7 |
| Water solubility | Soluble in water |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Basic Chromium Sulphate
Applications
- Leather Tanning: The primary agent for converting raw hides into durable, soft, and stable leather.
- Textile Mordant: Used to fix dyes onto fibers, particularly in high-performance outdoor fabric manufacturing.
- Metal Treatment: Applied in specialty plating and corrosion resistance treatments for industrial automotive parts.
Safety & Risks
Classified as Toxic and Corrosive. Exposure can cause severe skin sensitization and respiratory damage. Wear heavy-duty gloves, aprons, and respirators.
Packaging
25kg moisture-proof bags and 1000kg bulk bags.