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Alumina Trihydrate (ATH or hydrated alumina) is a non-toxic, non-corrosive, flame retardant and smoke suppressant utilized in elastomeric applications. It is the most frequently used flame retardant in the world. ATH is a very effective flame retardant due to its thermodynamic properties which absorb heat and release water vapor.

Alumina trihydrate releases its 35% water of crystallization as water vapor when heated above 205°C. The resulting endothermic reaction cools the product below flash point, reducing the risk of fire and acts as a vapor barrier to prevent oxygen from reaching the flame. Typical loadings vary from 20 phr to 150 phr.

Because many polymers like polyethylene and polypropylene process above 200°C, these polyolefins should use magnesium hydroxide as a flame retardant filler since its water of hydration releases at approximately 325°C.

PRODUCT IDENTIFICATION
CAS NO.	:	7784-18-1, 15098-87-0 (Trihydrate)
EINECS NO.	:	232-051-1
FORMULA	:	AlF₂
MOL WT.	:	83.98
H.S. CODE	:	2826.12
SYNONYMS	:	Aluminum Trifluoride Trihydrate; Aluminiumfluorid (German); Fluoruro de aluminio (Spanish); Fluorure d’aluminium (French)
DERIVATION	:	Alumina Trihydrated And Hydrofluoric Acid

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE	:	White crystalline powder, odorless
MELTING POINT	:	1291 C
SOLUBILITY IN WATER	:	slightly soluble
STABILITY	:	Stable under ordinary conditions.

SALES SPECIFICATION
APPEARANCE	:	White crystalline powder
ASSAY ( AlF₃ )	:	96.0% min
SILICA ( SiO₂ )	:	0.18% max
LOSS ON IGNITION	:	1.0% max
ALUMINA (Al₂O₃)	:	2.0% max
SULFATES (as SO₄)	:	0.002% max
PHOSPHATES (as P₂O₅)	:	0.008% max
IRON (as Fe₂O₃)	:	0.02% max
SIEVE ANALYSIS	:	10% max (100 mesh), 90% min (325 mesh)
TRANSPORTATION
PACKING	:	25kgs in Bag
HAZARD CLASS	:	Not Regulated

Applications Aluminum Trihydrate is used in various industries as:

A raw material in the production of aluminum chemicals.
A raw material in the manufacture of glass and glazes.
A raw material in catalyst production.
A flame retardant and smoke suppressant filler in plastics (for example: Cables, rubber products and carpet backing).
A raw material for fertilizers, and fiber cement board products.
An extender and bodying agent in paper, solvent- and water-borne paints, UV curable coatings, inks, and adhesives.
A polishing and cleansing agent, mould wash and separating agent.
A filler of cast polymer products such as onyx and solid surfaces.

PHYSICAL PROPERTIES

Powdery substance
Odorless
Non-carcinogenic
Contains thermal characteristic that provides translucency and whiteness to solid surface materials.
Non-smoking, low-toxicity, halogen-free flame retardant.