Alum Ammonia – 500 gram Packs

Ammonium Alum, also known as ammonia alum or ammonium aluminium sulfate, is an inorganic double salt containing ammonium, aluminium, and sulfate ions. The commonly encountered dodecahydrate has the chemical formula NH4Al(SO4)2·12H2O and a molecular weight of approximately 453.33 g/mol. It is a white crystalline solid that dissolves in water and is useful for studying ionic compounds, solubility, and crystallisation. Ammonium Alum is widely relevant to educational chemistry practicals, college experiments, and selected laboratory procedures requiring an aluminium ammonium sulfate reagent. It can support crystal-growth demonstrations, preparation of aqueous solutions, and investigations of hydrated salts. For analytical and research applications, the chemical form and grade should match the requirements of the intended method. Appropriate laboratory handling and storage practices should always be followed.

Product Specifications

Specification	Details
Appearance	White crystalline solid
Assay	99%
Chemical Name	Ammonium Aluminium Sulphate Dodecahydrate
Alternate Names	Ammonium Alum, Ammonia Alum, Aluminium Ammonium Sulphate
Molecular Formula	NH4Al(SO4)2·12H2O
Empirical Formula	H28AlNO20S2
CAS Number	7784-26-1
Molecular Weight	453.33 g/mol
Grade	LR Laboratory Reagent

Key Features of Ammonium Alum

• Inorganic double sulfate containing ammonium and aluminium ions.
• The dodecahydrate form contains twelve water molecules per formula unit.
• Water-soluble crystalline material suitable for compatible solution-preparation procedures.
• Useful for demonstrating crystallisation, solubility, and hydrated salt chemistry.
• Relevant to educational and research laboratories when the chemical form and grade meet the intended method requirements.

Laboratory Applications of Ammonium Alum

• School chemistry practicals demonstrating crystallisation and the formation of crystals from aqueous solutions under appropriate supervision.
• College and university experiments involving solubility, hydrated salts, and the properties of ionic compounds.
• Preparation of aqueous reagent solutions for procedures that specifically require ammonium aluminium sulfate.
• Laboratory investigations of double salts and their chemical composition.
• Research procedures involving aluminium-containing sulfate compounds, provided the reagent form and grade are suitable for the method.

Why Choose Lab Wale to Buy Ammonium Alum

Lab Wale provides a sourcing option for laboratory chemicals and scientific supplies used by schools, colleges, universities, research centres, and laboratory professionals. When purchasing Ammonium Alum, laboratories should confirm the chemical form, grade, pack size, and suitability for the intended experiment. Available technical and safety information can help users make informed purchasing decisions and plan appropriate handling and storage. The 500 g pack offers a defined quantity for educational practicals, solution preparation, and compatible laboratory investigations.

Frequently Asked Questions About Ammonium Alum

What is Ammonium Alum used for in laboratories?

Ammonium Alum is used in chemistry practicals involving crystal growth, crystallisation, solubility, and hydrated salts. It can also be used to prepare solutions for procedures specifying ammonium aluminium sulfate. The suitability of the reagent depends on the experiment and the required grade.

What is the molecular formula of Ammonium Alum?

The commonly supplied dodecahydrate has the molecular formula NH4Al(SO4)2·12H2O and a molecular weight of approximately 453.33 g/mol. The twelve water molecules are part of the hydrated crystal structure and must be included when calculating reagent quantities.

What is the CAS number of Ammonium Alum?

The CAS Registry Number for ammonium aluminium sulfate dodecahydrate is 7784-26-1. This identifier corresponds to the hydrated form, so laboratories should confirm the product identity before recording the number or using the material in a procedure.

Is Ammonium Alum suitable for school, college, and research laboratories?

Ammonium Alum can be suitable for supervised educational experiments involving crystallisation and ionic compounds, as well as compatible research procedures. Users should verify the required grade and chemical form, review the Safety Data Sheet, and follow appropriate laboratory safety procedures.

How should Ammonium Alum be stored and handled safely?

Store it in a tightly closed, labelled container in a cool, dry place, protected from contamination. Wear suitable gloves, safety glasses, and laboratory clothing during handling. Avoid creating dust, and follow the current Safety Data Sheet for exposure controls, spill response, and waste disposal.

Storage Conditions for Ammonium Alum

Store Ammonium Alum in a tightly closed, clearly labelled container in a cool, dry, well-ventilated location. Protect the material from contamination and excessive moisture, and use clean equipment when transferring the crystals or powder. Keep it separated from incompatible substances in accordance with the current Safety Data Sheet.

Precautions for Handling Ammonium Alum

Review the Safety Data Sheet before use. Wear suitable laboratory gloves, safety glasses, and protective clothing. Avoid inhaling dust and prevent unnecessary contact with the eyes and skin. Use appropriate ventilation when weighing or transferring the powder, clean up spills using approved laboratory procedures, and dispose of residues and solutions according to institutional and local requirements.