Aluminium Sulphate

CAS: 10043-01-3
Aluminum Sulfate –for paper making
Molecular Formula: Al2(SO4)3 XH2O
Properties: It is white or gray flake, particle or massive crystallization. Apt to cake after moisture absorption when laid in air for a long time. A little green because of Fe2+, yellow when Fe2+ is oxided to Fe3+. Soluble in water easily, and water solution is acid.
Use: Used with saponified rosin as paper strength enhancing binder to improve waterproof property. Also can be used in printing and dyeing, leather, color agentia and wood trust proof.
Packing: In 25kg or 50kg woven bags with inner film.
Specification:
Al2O3: 15.8% min.
Fe: 0.3% max.
Water insoluble: 0.1% max.
PH(1% water solution): 3 min,

Aluminum Sulfate for water purifying
Molecular Formula: Al2(SO4)3 XH2O
Properties: It is white or gray flake, particle or massive crystallization. Apt to cake after moisture absorption when laid in air for a long time. A little green because of Fe2+, yellow when Fe2+ is oxided to Fe3+. Soluble in water easily, and water solution is acid.
Use: Mainly used in industrial water and waster water treatment.
Packing: In 25kg or 50kg woven bags with inner film.
Specification:
Al2O3: 15.8% min.
Fe: 0.3% max.
Water insoluble: 0.1% max.
PH(1% water solution): 3 min,
 
High-purity Aluminum Sulfate
High-purity aluminum sulfate is a kind of white crystal whose specific gravity is 1.69. If open to the air for a long time, it might absorb moisture and have hard settings. Under 86.5, it will become dehydrated. It is soluble in water, acid and alkali, insoluble in alcohol. Its aqueous solution is acid. Hearted under 530, it will decompose. When the temperature increases to 860, it will end decomposing.  The end product of decomposition if r-Al2O4. During the period of hydrolysis, high-purity aluminum sulfate will produce alkali salt and then aluminium hydroxide.
Al2O3: 17% min.
Fe: 0.003% max.
Matter insoluble in water: 0.005% max.
PH: 3 min.