Aluminium phosphate extra pure

Aluminium phosphate extra pure refers to a highly refined grade of aluminium phosphate (

AlPO

4

AlPO

4

), a white, odorless, crystalline or amorphous powder widely used in laboratory, industrial, and pharmaceutical settings for its purity and consistent performance.​

Chemical Properties and Composition

Chemical Formula:

AlPO

4

AlPO

4

.​

Molecular Weight: 121.95 g/mol.​

Appearance: White crystalline or amorphous powder; odorless.​

Density: ~2.56 g/cm³.​

Melting Point: ~1,800°C (decomposes before boiling).​

Solubility: Insoluble in water; slightly soluble in acids like HCl and HNO₃.​

Purity (extra pure): Typically ≥98%, with very low levels of trace impurities.​

Applications

Laboratory Reagent: Used for analytical and research purposes in preparation of standards and chemical synthesis.​

Pharmaceuticals: Acts as an antacid, is used in dental cements, and as a vaccine adjuvant.​

Ceramics and Glass: Important as a binder, cement, and flux in advanced ceramics, refractories, and glass production.​

Food and Cosmetics: Used as a food additive for leavening and in cosmetics as an emulsifier and stabilizer.​

Water Treatment: Functions as a coagulant in purification processes.​

Technical Notes

Structure: Similar to quartz (

SiO

2

SiO

2

), with trigonal or framework crystalline forms in the anhydrous state; may also occur in hydrated forms such as pentahydrate and dihydrate (

AlPO

4

⋅

2

H

2

O

AlPO

4

⋅2H

2

O,

AlPO

4

⋅

5

H

2

O

AlPO

4

⋅5H

2

O).​

Health & Safety: Non-flammable but can irritate eyes, skin, and respiratory tract at high concentrations.​

Typical Assay: Purity certified by trace analysis of iron, heavy metals, chloride, sulfate, and other contaminants.​

Extra pure aluminium phosphate is chosen for sensitive chemical and pharmaceutical processes, where trace contamination must be minimized and standard specifications met.