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High thermal stability up to 800°C, ensuring color retention during high-temperature processing.
Excellent UV resistance and weatherfastness for long-term outdoor performance.
Non-toxic, heavy-metal-free formulation compliant with global environmental regulations including EN 71-3 and RoHS.
Superior dispersion stability in aqueous and solvent-based systems without requiring additional dispersants.
Consistent particle size distribution for uniform color development and optimal hiding power.
Architectural coatings and exterior wall paints.
Ceramic glazes and vitreous enamel applications.
Plastic coloration for automotive interior components.
High-performance industrial maintenance coatings.
Colored concrete and precast concrete products.
| Chemical Type | Mixed metal oxide (iron-chromium-zinc spinel) |
| Product Form | Fine dry powder |
| Appearance | Free-flowing brownish-red powder |
| Primary Applications | Coatings, plastics, ceramics, construction materials |
| Key Features | Heat stable, lightfast, chemically inert, non-hygroscopic |
| Benefits | Low VOC impact, regulatory compliant, batch-to-batch consistency |
| pH (10% aqueous slurry) | 6.5 – 7.5 |
| Volatile Matter (105°C, 2 hrs) | ≤ 0.5 wt% |
Q1: What is the primary chemical composition and classification of BR-832?
A: Cathay Hoover Environoxide BR-832 is a mixed-metal oxide pigment based on iron and chromium, engineered to deliver stable brown-to-black hues. It is classified as a high-performance inorganic pigment with inherent thermal, light, and chemical resistance typical of spinel-structured oxides.
Q2: Is BR-832 suitable for use in food-contact or pharmaceutical packaging applications?
A: BR-832 is formulated for compliance with general regulatory expectations for inorganic pigments in indirect food-contact applications, such as outer packaging layers. However, final regulatory acceptance depends on the complete formulation, processing conditions, and end-use requirements — users must conduct appropriate migration testing and consult applicable regional regulations before deployment.
Q3: How does BR-832 perform under high-temperature processing conditions?
A: BR-832 exhibits excellent thermal stability and retains its color integrity during standard polymer processing, including extrusion and injection molding at temperatures up to 300 °C. Its inorganic nature ensures minimal decomposition or gas evolution, supporting clean processing in engineering thermoplastics and high-performance composites.
Q4: Can BR-832 be used in water-based coatings and inks?
A: Yes — BR-832 is compatible with aqueous systems when properly surface-treated and dispersed. It is commonly used in architectural coatings, industrial waterborne paints, and functional inks where long-term UV stability and low volatility are required. Optimal performance depends on dispersion quality and pH compatibility within the specific formulation.
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