Chrome Alum – 500 gram Packs

Chrome Alum, also known as potassium chromium(III) sulphate dodecahydrate, is an inorganic double salt containing potassium, chromium(III), sulphate ions, and water of crystallization. Its chemical formula is KCr(SO4)2·12H2O, and its molecular weight is approximately 499.40 g/mol. This compound typically occurs as violet to purple crystalline solids and is soluble in water. Chrome Alum is used in chemistry laboratories for studying double salts, crystallization, solubility, and the properties of chromium(III) compounds. It is also relevant to selected research procedures involving inorganic salts and coordination chemistry. Its well-defined composition makes it useful for educational experiments and appropriate laboratory investigations. The 500 gram pack is suitable for planned institutional reagent requirements. Selection should be based on the required chemical identity, grade, and experimental specifications, with appropriate precautions taken when handling chromium-containing compounds.

Product Specifications

Specification	Details
Appearance	Violet crystalline powder
Assay	99%
Chemical Name	Potassium chromium(III) sulphate dodecahydrate
Alternate Names	Chrome Alum, Chromium(III) Potassium Sulphate Dodecahydrate, Potassium Chromium Alum, Chromic Potassium Sulphate Dodecahydrate
Molecular Formula	KCr(SO4)2·12H2O
Empirical Formula	CrH24KO20S2
CAS Number	7788-99-0
Molecular Weight	499.40 g/mol
Grade	LR Laboratory Reagent

Key Features of Chrome Alum

• Defined inorganic composition: Potassium chromium(III) sulphate dodecahydrate is a double salt containing chromium in the +3 oxidation state.
• Characteristic violet appearance: Its violet to purple crystalline form helps distinguish it from many other inorganic laboratory reagents.
• Water solubility: The compound dissolves in water, making it suitable for selected solution-preparation and crystallization experiments.
• Educational chemistry applications: Its composition and crystallization behaviour support the study of double salts and inorganic chemistry principles.
• Practical laboratory pack: The 500 gram pack supports planned reagent use in educational, analytical, and research laboratories.

Laboratory Applications of Chrome Alum

• Crystallization experiments: Used in supervised chemistry practicals to study crystal formation, solubility, and crystallization from aqueous solutions.
• Inorganic chemistry education: Supports experiments illustrating the composition and properties of double salts and hydrated inorganic compounds.
• Solution preparation: Used to prepare aqueous solutions for laboratory investigations requiring potassium chromium(III) sulphate under specified experimental conditions.
• Coordination chemistry research: Relevant to selected investigations involving chromium(III) compounds and their behaviour in aqueous chemical systems.
• Comparative studies of inorganic salts: Used in appropriate laboratory exercises examining the physical properties, hydration, and solution behaviour of different salts.

Why Choose Lab Wale to Buy Chrome 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 Chrome Alum, laboratories should verify the chemical identity, hydrate form, stated grade, pack size, and relevant specifications against their intended procedures. Reviewing applicable technical and safety documentation helps support informed purchasing decisions. The 500 gram pack offers a convenient format for institutions planning reagent consumption, inventory management, and routine inorganic chemistry practicals.

Frequently Asked Questions About Chrome Alum

What is Chrome Alum used for in laboratories?

Chrome Alum is used in inorganic chemistry experiments involving double salts, crystallization, solubility, and hydrated compounds. It also supports selected investigations of chromium(III) chemistry and aqueous inorganic systems. The appropriate application depends on the required reagent specifications and the laboratory procedure.

What is the molecular formula of Chrome Alum?

The molecular formula of Chrome Alum dodecahydrate is KCr(SO4)2·12H2O. The twelve water molecules are part of its crystalline composition. Its molecular weight is approximately 499.40 g/mol, so this value should be used when calculating quantities for the dodecahydrate rather than the anhydrous salt.

What is the CAS number of Chrome Alum?

The CAS Registry Number for potassium chromium(III) sulphate dodecahydrate is 7788-99-0. This identifier helps distinguish the compound from other chromium salts and related alums. Confirm that the chemical name, formula, and hydrate form match the intended reagent when ordering or preparing laboratory solutions.

Is Chrome Alum soluble in water?

Yes, Chrome Alum is soluble in water, allowing it to be used in suitable aqueous solution and crystallization experiments. Its dissolution and crystallization behaviour depend on factors such as temperature and solution composition. Follow the specified experimental method when preparing solutions or growing crystals.

How should Chrome Alum be stored and handled safely?

Store Chrome Alum in a tightly closed, clearly labelled container in a cool, dry place, following the supplier’s instructions. Avoid inhaling dust and prevent contact with skin and eyes. Wear suitable gloves and eye protection, and consult the current Safety Data Sheet for applicable handling, spill-management, and disposal procedures.

Storage Conditions for Chrome Alum

Store Chrome Alum in its original, tightly closed container in a cool, dry, well-ventilated location. Protect the crystals from contamination and unnecessary exposure to moisture, and keep the container clearly labelled. Store it separately from incompatible chemicals in accordance with the applicable Safety Data Sheet and institutional chemical-storage procedures.

Precautions for Handling Chrome Alum

Review the current Safety Data Sheet before use. Wear suitable protective gloves, laboratory clothing, and safety goggles, and avoid generating or inhaling dust. Prevent contact with skin and eyes, wash hands after handling, and use appropriate ventilation when weighing the powder. Collect spills and dispose of chromium-containing waste according to institutional procedures and applicable environmental regulations. Ensure that educational experiments are conducted under suitable supervision.