Description
Aluminium ammonium sulphate dodecahydrate is an analytical-grade inorganic salt offered at a minimum purity of 98 % (p.a., ACS). Identified by CAS number 7784-26-1 and empirical formula NH₄Al(SO₄)₂ · 12 H₂O, it has a molar mass of 453,33 g/mol and a density of 1,65 g/cm³, with a boiling point above 280 °C. These properties make the dodecahydrate suitable for quantitative inorganic analysis, precipitation work and the preparation of aluminium-containing standard solutions. The reagent is Available from manufacturer Carl ROTH, this ACS-compliant p.a. salt fits workflows that demand consistent composition and documented identity (EG nr. 232-055-3). Typical applications include mordant and alum chemistry studies, environmental sample preparation and quality-control procedures where reproducible aluminium and sulphate content is required. Its defined hydrate form helps maintain stoichiometric clarity in recipe-based protocols and reference preparations across research and industrial laboratories.
This article is part of Inorganic salts, in Inorganic chemicals.
Key features
- Assay (compl.): 98.0 - 102.0 %
- pH value (5 % solution): ≥3,0
- In H2O insoluble matter: ≤0,005 %
- Chloride (Cl): ≤0,001 %
- Nitrate (NO3): ≤0,001 %
- Silicate (SiO3): ≤0,002 %
- Phosphate (PO4): ≤0,0025 %
- Arsenic (As): ≤0,00005 %
- Calcium (Ca): ≤0,05 %
- Iron (Fe): ≤0,001 %
- CAS number: 7784-26-1
- Pack sizes: 500 g, 1 kg, 2.5 kg, 100 g
- EG nr.: 232-055-3
- Purity: min. 98 %, p.a., ACS
- Empirical formula: NH₄Al(SO₄)₂ · 12 H₂O
- Molar mass: 453,33 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Aluminium ammonium sulphate dodecahydrat, min. 98 %, p.a., ACS, 500 g, plastic
What is this article?
Aluminium ammonium sulphate dodecahydrat, min. 98 %, p.a., ACS, 500 g, plastic is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Inorganic salts, inside Inorganic chemicals, in Lab chemicals.
An inorganic salt is an ionic solid, a chloride, a sulfate, a nitrate, a phosphate. The degree of hydration changes the mass that contains one mole of the ion. Analytical grade limits the foreign ions. A hydrate and the anhydrous salt are not interchangeable by weight.
An inorganic chemical is a salt, an acid or base in solid form, a metal, an oxide, or an element. The waters of hydration are part of the formula: a hydrate and an anhydrous salt are different masses for the same ion. Trace metals matter when the salt will be used in analysis. Nanomaterials add particle size to the specification. Look the substance up on PubChem. Hazard classes are on ECHA, under the CLP Regulation and REACH. Transport of the dangerous ones is explained by the UNECE.
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Shelves beside this one are Metals, elements & oxides and Nanomaterials & quantum dots.
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