Antioxidant 626
This product is readily soluble in tetrahydrofuran and toluene, soluble in acetone, heptane, hexane, and methanol, and insoluble in water. It exhibits lower volatility and contains a lower phosphorus content compared to other phosphite ester antioxidants.
CAS #: 26741-53-7
Chemical Structure:
Formula: C33H50O6P2
Molecular weight: 604
Shelf Life: 6 months
Performance and application:
Antioxidant 626 is a high-performance solid phosphite ester antioxidant with excellent thermal stability and long-term durability. It effectively protects polymers from thermal and oxidative degradation during processing, and also provides good color stability. When used in combination with phenolic primary antioxidants, it exhibits a strong synergistic effect. This product is widely applied in polyolefins such as polyethylene, polypropylene, and ethylene hydrocarbon copolymers, as well as in engineering plastics including polystyrene homopolymers or copolymers, polyurethanes, elastomers, and adhesives. Furthermore, Antioxidant 626 can be used together with light stabilizers such as hindered amine light stabilizers (HALS) and ultraviolet absorbers for enhanced protection. The recommended dosage is 0.05% to 0.15%.
Storage and Package:
It should be stored in a dry and cool environment as a general chemical and kept in a sealed carton.
Packed in cartons or paper-plastic composite bags lined with plastic bags, 25Kg/carton(bag).
Specification:
| ITEMS | SPECIFICATIONS |
| Appearance | White powder or beads |
| Melting point range,℃ | 170.0~180.0 |
| Heating reduction,% | 1.0 Max |
| Acid value,mg KOH/g | 1.0 Max |
| Free 2, 4-di-tert-butylphenol,% | 1.0 Max |
| Main content,% | 96.0 Min |
| Active principle,% | 98.0 Min |
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