Aluminum Sulfate Octadecahydrate

CAS #:

Linear Formula:

Al2(SO4)3• 18H2O

MDL Number:


EC No.:



(2N) 99% Aluminum Sulfate Octadecahydrate
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(2N5) 99.5% Aluminum Sulfate Octadecahydrate
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(3N) 99.9% Aluminum Sulfate Octadecahydrate
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(3N5) 99.95% Aluminum Sulfate Octadecahydrate
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(4N) 99.99% Aluminum Sulfate Octadecahydrate
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(5N) 99.999% Aluminum Sulfate Octadecahydrate
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Aluminum Sulfate Octadecahydrate Properties (Theoretical)

Compound Formula Al2H36O30S3
Molecular Weight 666.43
Appearance White powder, chunks, granules, or crystals
Melting Point 87 °C
Boiling Point N/A
Density 1.69 g/cm3
Solubility in H2O N/A
Exact Mass 666.00843
Monoisotopic Mass 666.00843

Aluminum Sulfate Octadecahydrate Health & Safety Information

Signal Word Danger
Hazard Statements H290-H318
Hazard Codes Xi
Precautionary Statements P280-P305 + P351 + P338 + P310
Flash Point Not applicable
Risk Codes 41
Safety Statements 26-39
RTECS Number N/A
Transport Information UN3260 - class 8 - PG 3
WGK Germany 1
GHS Pictograms

About Aluminum Sulfate Octadecahydrate

High purity Aluminum Sulfate OctadecahydrateAluminum Sulfate Octadecahydrate is a moderately water and acid soluble Aluminum source for uses compatible with sulfates. Sulfate compounds are salts or esters of sulfuric acid formed by replacing one or both of the hydrogens with a metal. Most metal sulfate compounds are readily soluble in water for uses such as water treatment, unlike fluorides and oxides which tend to be insoluble. Organometallic forms are soluble in organic solutions and sometimes in both aqueous and organic solutions. Metallic ions can also be dispersed utilizing suspended or coated nanoparticles and deposited utilizing sputtering targets and evaporation materials for uses such as solar cells and fuel cells. Aluminum Sulfate is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. We also produce Aluminum Sulfate Solution. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Aluminum Sulfate Octadecahydrate Synonyms

Aluminum sulfate hydrate (2:3:18), Aluminium sulfate-18-hydrate, aluminum sulfate 14-18 hydrated

Chemical Identifiers

Linear Formula Al2(SO4)3• 18H2O
MDL Number MFCD0014913
EC No. 233-135-0
Beilstein/Reaxys No. N/A
Pubchem CID 22377415
IUPAC Name dialuminum trisulfate octadecahydrate
SMILES [Al+3].[Al+3].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
InchI Identifier 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

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements


See more Aluminum products. Aluminum (or Aluminium) (atomic symbol: Al, atomic number: 13) is a Block P, Group 13, Period 3 element with an atomic weight of 26.9815386. It is the third most abundant element in the earth's crust and the most abundant metallic element. Aluminum Bohr Model Aluminum's name is derived from alumina, the mineral from which Sir Humphrey Davy attempted to refine it from in 1812. Aluminum was first predicted by Antoine Lavoisier 1787 and first isolated by Hans Christian Øersted in 1825. Aluminum is a silvery gray metal that possesses many desirable characteristics. It is light, nonmagnetic and non-sparking. It stands second among metals in the scale of malleability, and sixth in ductility. It is extensively used in many industrial applications where a strong, light, easily constructed material is needed. Elemental AluminumAlthough it has only 60% of the electrical conductivity of copper, it is used in electrical transmission lines because of its light weight. Pure aluminum is soft and lacks strength, but alloyed with small amounts of copper, magnesium, silicon, manganese, or other elements, it imparts a variety of useful properties.


See more Sulfur products. Sulfur (or Sulphur) (atomic symbol: S, atomic number: 16) is a Block P, Group 16, Period 3 element with an atomic radius of 32.066. Sulfur Bohr ModelThe number of electrons in each of Sulfur's shells is 2, 8, 6 and its electron configuration is [Ne] 3s2 3p4. In its elemental form, sulfur has a light yellow appearance. The sulfur atom has a covalent radius of 105 pm and a Van der Waals radius of 180 pm. In nature, sulfur can be found in hot springs, meteorites, volcanoes, and as galena, gypsum, and epsom salts. Sulfur has been known since ancient times but was not accepted as an element until 1777, when Antoine Lavoisier helped to convince the scientific community that it was an element and not a compound.


June 11, 2024
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