BX FR PHT4 Diol Tetrabromophthalic Diol


Chemical name Tetrabromophthalate Diol, BX FR PHT4
Trade name: BX FR PHT4
Equivalent to: Albemarle RB‐79; Great lakes PHT4‐Diol
CAS No.:  77098‐07‐8 & 20566‐35‐2



Appearance Succinic ropy liquid.
Bromine % 44
Hydroxyl number (mg KOH/g)  200‐235
Acid number (mg KOH/g). 0.1 max.
Viscosity(CP/25°C) 80000‐130000
Moisture %. 0.1 max.
Specific Gravity(25°C) 1.6-1.9

1% weight loss 128°C
5% weight loss 166°C
50% weight loss 319°C



Tetrabromophthalate Diol acts As a reactive fire retardant, this product is mainly used for rigid polyurethane foam, adhesion, and paint. The product is succinic ropy liquid. Dissolvable in acetone, toluene, alcohol, etc, but undissolvable in water.



The net weight of each bag is 25 kg, the inner bag is a thickened PE film bag, and the outer bag is a film bag. It is stored and transported as non-toxic and non-hazardous goods. Pay attention to fire prevention, moisture prevention, and sun protection, and store in a cool place away from light.


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