Cobalt Blue PB 28
CAS 1345-16-0
In StockMOQ
25 kg
Lead Time
7–14 days
Packaging
25 kg bags
Specifications
| Density | 3.8–4.2 g/cm³ |
| Appearance | blue powder |
| Color Index | PB 28 |
| Lightfastness | 8 (ISO 105-B02) |
| Heat Stability | 1000°C |
| Oil Absorption | 18–30 g/100g |
| Chemical Resistance | excellent |
| Chemical Composition | CoAl₂O₄ (cobalt aluminate, spinel) |
FAQ
PB 28 is a calcined spinel (CoAl₂O₄) thermally stable above 1000°C, far exceeding organic pigments or phthalocyanines. It is the standard blue for exhaust coatings, kiln furniture, and glass-enamel applications.
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