Alum Lumps

120.00760.00

Alum lumps are a type of crystal composed of a hydrated aluminum sulfate salt. The most common type is potash alum, which is made from potassium aluminum sulfate. Alum lumps are white, odorless, and soluble in water.

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Alum lumps are a crystallized mineral compound with a wide range of uses. Here's a breakdown of their properties and common applications:

What are Alum Lumps?

  • A type of alum, typically ammonium alum, made from aluminum, ammonia, and sulfate.
  • Appears as white, crystalline lumps.
  • Soluble in water.
  • Generally odorless with a slightly acidic taste.

Common Uses:

  • Water Purification: Acts as a flocculant in water treatment, binding impurities and making them easier to remove through filtration [1].
  • Deodorant: Used in styptic pencils to stop minor bleeding and as a natural deodorant due to its astringent properties [2].
  • Food Industry: Employed as a pickling agent to help vegetables stay crisp [2].
  • Industrial Applications:
    • Paper production: Improves paper quality and strength [3].
    • Dyeing textiles: Helps dyes adhere to fabrics [4].
    • Tanning leather [2].

Additional Points:

  • Generally considered safe for most applications.
  • Available in various grades, with industrial uses requiring higher purity.

Additional information

Weight N/A
CAS number

7784-26-1

Chemical formula

AlNH4(SO4)2·12H2O

Molar mass

453.33

Physical state

Crystals

Odor

ODORLESS

Melting point

93.5°C

Boiling point

280°C

Density

1.6400g/mL

Solubility in water

14% In Water

Flash point:

NA

Autoignition temperature

NA

Dye Content

NA

Vapor pressure

NA

UN number

NA

Flammability

NA

Carcinogenicity

NA

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