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Sulfuric acid, aluminumsalt (3:2), octadecahydrate (8CI,9CI) structure
Sulfuric acid, aluminumsalt (3:2), octadecahydrate (8CI,9CI) structure

Sulfuric acid, aluminumsalt (3:2), octadecahydrate (8CI,9CI)

Iupac Name:dialuminum trisulfate nonahydrate
CAS No.:7784-31-8
Molecular Weight:504.288396
Introduction: 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.
1. Names and Identifiers
1.1 Name
Sulfuric acid, aluminumsalt (3:2), octadecahydrate (8CI,9CI)
1.2 Synonyms

ALUMINIUM SULFATE-18-HYDRATE Aluminiumsulfate,octadecahyd ALUMINUM SULFATE - 18 H2O ALUMINUM SULFATE HEXADECAHYDRATE ALUMINUM SULFATE OCTADECAHYDRATE ALUMINUM SULFATE, 18-HYDRATE ALUMINUM SULFATE, HYDRATED CAKE ALUM

1.3 CAS No.
7784-31-8
1.4 CID
22377415
1.5 EINECS(EC#)
233-135-0
1.6 Molecular Formula
Al2H36O30S3 (isomer)
1.7 Inchi
InChI=1S/2Al.3H2O4S.18H2O/c;;3*1-5(2,3)4;;;;;;;;;;;;;;;;;;/h;;3*(H2,1,2,3,4);18*1H2/q2*+3;;;;;;;;;;;;;;;;;;;;;/p-6
1.8 InChkey
AMVQGJHFDJVOOB-UHFFFAOYSA-H
1.9 Canonical Smiles
O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Al+3].[Al+3]
1.10 Isomers Smiles
O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Al+3].[Al+3]
2. 3D Conformer
3. Properties
3.1 Density
1,69
3.2 Melting Point
86oC
3.3 Boiling Point
330°C at 760 mmHg
3.4 Appearance
white crystalline chunks
3.5 Chemical Properties
white crystalline powder and chunks
3.6 Color/Form
White
3.7 Solubility
Soluble in water
3.8 StorageTemp
Store at room temperature.
3.9 Water solubility
Soluble
4. Use and Manufacturing
4.1 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 Preparation Products And Raw materials Raw materials
4.2 Usage
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.
5. Safety and Handling
5.1 Hazard Codes
Xn; N
5.2 Risk Statements
R22;R36/37/38;R41;R51/53
5.3 Safety Statements
61-37/39-29-26-39
5.4 Safety
A poison by intraperitoneal route. Moderately toxic by intraperitoneal route. Low toxicity by ingestion. Mutation data reported. When heated to decomposition it emits toxic vapors of SOx.
5.5 Toxicity
LD50 orally in Rabbit: > 5000 mg/kg
6. MSDS

2.Hazard identification

2.1 Classification of the substance or mixture

Serious eye damage, Category 1

2.2 GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Danger

Hazard statement(s)

H318 Causes serious eye damage

Precautionary statement(s)
Prevention

P280 Wear protective gloves/protective clothing/eye protection/face protection.

Response

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

P310 Immediately call a POISON CENTER/doctor/…

Storage

none

Disposal

none

2.3 Other hazards which do not result in classification

none

7. Computational chemical data
  • Molecular Weight:504.288396g/mol
  • Molecular Formula:Al2H36O30S3
  • Exact Mass:503.913347
  • Monoisotopic Mass:503.913347
  • Complexity:62.2
  • Rotatable Bond Count:0
  • Hydrogen Bond Donor Count:9
  • Hydrogen Bond Acceptor Count:21
  • Topological Polar Surface Area:275
  • Heavy Atom Count:26
  • Defined Atom Stereocenter Count:0
  • Undefined Atom Stereocenter Count:0
  • Defined Bond Stereocenter Count:0
  • Undefined Bond Stereocenter Count:0
  • Isotope Atom Count:0
  • Covalently-Bonded Unit Count:14
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