Types of Alum

There are a few types of alum available. These are

Potash Alum
Soda Alum
Ammonium Alum
Chrome Alum
Selenate Alum

Here we will discuss them briefly in a tabular form. This will help students to understand easily.

Types of Alum	Chemical Formula	Chemical Name	Other names	Molar Mass	Other Properties
Potash Alum	KAl(SO₄)₂·12H₂O	Potassium Aluminium Sulphate	potassium alum, Fitkari	258.192 g/mol	Occur – in white crystalline form Also known as white alum Odor – Metallic Water
Soda Alum	NaAl(SO₄)₂·12H₂O	Sodium Aluminium Sulphate	sodium alum or just SAS	458.28 g/mol	Occur – in white crystalline form It is found in baking soda Odor – Metallic Water
Ammonium Alum	NH₃Al(SO₄)₂·12H₂O	Ammonium Sulphate Alum	AAS	132.14 g/mol	Occur – in white crystalline form. Odor – like Metallic Water.
Chrome Alum	KCr(SO4)₂·12H₂O	Chromium Aluminium Sulphate	Chromium alum is CAS	283.22 g/mol	Occur – in purple crystalline form Odor – Smell like metallic Water
Selenate Alum	Al₂O₁₂Se₃	Selenium Aluminium Sulphate	Selenium Alum	482.9 g/mol	Strong oxidising agent Occur – Found in white crystalline form Odor – Smell like metallic Water

Alum – Formula, Types, Production, Properties, Uses

Alum is an important inorganic compound which are double sulfates of a monovalent metal (such as potassium, sodium, or ammonium) and a trivalent metal (such as aluminum, chromium, or iron). Alum is widely used in industries as well as medical purposes. It has antiseptic property and is used after shave. It is often called “Fitkari.”

In this article, we learn about alum, its properties, different types of alum, its uses, and many more important facts related to it.

Table of Content

What is Alum?
Production of Alum
Properties of Alum
Types of Alum
Uses of Alum
Alum Water Treatment

Types of Alum

Alum – Formula, Types, Production, Properties, Uses

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