Aluminum oxide.trihydrate,

The final corrosion product, aluminum oxide trihydrate, is called Bayerite. 

FIGURE 9-2. Reaction of Aluminum in Water to Form Aluminum Oxide Trihydrate, or Bayerite... 

Alumina trihydrate alumina hydrate alumina hydrated aluminum oxide trihydrate aluminum oxide hydrate aluminum (III) hydroxide hydrated alumina hydrated aluminum oxide3 aluminum hydrate aluminum trihydrate hydrated aluminad... 

SYNS AF 260 ALCOA 331 ALUMIGEL ALUMINA HYDRATE ALUMINA HYDRATED ALUMINA TRIHYDRATE a-ALUMINA TRIHYDRATE ALUMINIC ACID ALUMINLLM HYDRATE ALUMINUM(III) HYDROXIDE ALUMINUM HYDROXIDE GEL ALUMINUM OXIDE HYDRATE ALUMINUM OXIDE TRIHYDRATE ALUMINUM TRIHYDRAT ALUMINUM TRIHYDROXIDE ... 

Miscellaneous. These approaches include dilution of the polymer with nonflammable materials (for example, inorganic fillers), incorporation of materials that decompose to nonflammable gases such as carbon dioxide, and formulation of products that decompose endothermically. A typical example of such a flame retardant is aluminum oxide trihydrate (AI2O3.3H2O). This type of material acts as a thermal sink to increase the neat capacity of the combusting system, lower the polymer surface temperature via endothermic events, and dilute the oxygen supply to the flame, thereby reducing the fuel concentration needed to sustain the flame. 

CAS 21645-51-2 EINECS/ELINCS 244-492-7 Synonyms Alumina hydrate Alumina hydrated Alumina trihydrate Alumlnic acid Aluminum hydrate Aluminum oxide hydrate Aluminum trihydrate Aluminum trihydroxide ATH Hydrated alumina Hydrated aluminum oxide Trihydrated alumina Classification Inorganic compd. 

Other flame retardant materials in use include ammonium polyphosphate, organophosphates (112), bromoaromatic phosphates, red phosphorus, aluminum oxide trihydrate, antimony oxide, melamine, and synergistic combinations of two or more of these (110,111). Currently, people are focusing more on phosphorous containing compounds relative to halogens (113-115). The percentage of each of these materials in use today, based on dollar value, is given in Table 14.9. 

The dehydration reaction in aluminum oxide trihydrate is strongly exothermic (1170 J g ). Since alumina is inert towards polymers, it is probable that the effect of this very widely used fire retardant additive is simply to remove heat. 

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