Aluminium sulfate octadecahydrate Chemical Properties

Melting point:

86 °C

Density 

1,69 g/cm³

storage temp. 

Sealed in dry,Room Temperature

solubility 

364g/l

form 

Powder/Solid

Specific Gravity

1.69

color 

White

PH

2.5-4.0 (20g/l, H2O, 20℃)

PH Range

3 - 4

Water Solubility 

Soluble

Sensitive 

moisture sensitive

CAS DataBase Reference

7784-31-8(CAS DataBase Reference)

EPA Substance Registry System

Sulfuric acid, aluminum salt (3:2), octadecahydrate (7784-31-8)

Safety Information

Hazard Codes 

N-Xn,Xi,N,Xn

Risk Statements 

51/53-41-36/37/38-22

Safety Statements 

61-37/39-29-26-39

RIDADR 

UN3260 - class 8 - PG 3 - RQ - Corrosive solid, acidic, inorganic, n.o.s., HI: all

WGK Germany 

1

RTECS 

WS5697000

HS Code 

2833 22 00

Toxicity

LD50 orally in Rabbit: > 5000 mg/kg

MSDS

• Language:English Provider:ACROS
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Aluminium sulfate octadecahydrate Usage And Synthesis

Uses

The compound is used heavily in the paper industry. In its acidic solution form, which contains a slight excess of H2SO4, it is used for pH control of pulp slurries, treatment of process waters, setting of dyes and also for precipitating dissolved resin for setting the size on the fibers. In slight basic form (containing a slight excess of Al2O3), it is used for treatment of drinking and waste waters (e.g., for reducing phosphorus content). Other major applications include dyeing, tanning, catalysts, modification of concrete, and in the manufacture of various chemicals and pharmaceutical products.

Preparation

Prepared from bauxite, kaolin or aluminum compounds on reaction with H2SO4. The insoluble silicic acid is filtered out; the hydrate salt forms on crystallization.

Chemical Properties

white crystalline powder and chunks

Physical properties

White crystal; sweet taste; density 1.62 g/cm³: decomposes at 86.5°C; soluble in water.

Uses

Aluminium sulfate octadecahydrate is a preservative, the inclusive term for several inum-type compounds such as inum sulfate and inum potassium sulfate. It is used with edta to prevent discoloration of potatoes and to maintain the firmness of shrimp packs. It is also used in pickles and pickle relish.

Definition

ChEBI: A hydrate resulting from the the formal combination of anhydrous aluminium sulfate with approximately 18 mol eq. of water. The commercial product usually contains 5-10% less water than theory. It is one of the commonest hydrates of aluminium sulfate.

Aluminium sulfate octadecahydrate(7784-31-8)Related Product Information

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• alumium polysulfate
• Potassium sulfate
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• Sodium sulfate
• Neomycin sulfate
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• calcium sulfate
• Heparitin, sulfate
• sulfate
• AMMONIUM ALUMINUM SULFATE
• Aluminium sulfate,non-ferrous
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• Ferric alum,Iron alum
• Aluminum
• aluminium sulfate hexadecahydrate
• Aluminium sulfate hydrate