Potassium tetraborate

CAS Number
1332-77-0
EC Number
215-575-5

What is Potassium tetraborate?

Potassium tetraborate (CAS 1332-77-0), also known as dipotassium tetraborate or potassium borate, is an inorganic boron salt used as a buffering agent, flame retardant and preservative.

Where is Potassium tetraborate used?

  • Water treatment: pH buffer and biocide
  • Textiles: flame retardant finish on natural and synthetic fibers
  • Leather processing: preservative during curing and tanning
  • Agriculture: boron micronutrient source in fertilizer blends
  • It controls microbial growth in process water and cooling systems.

Commercial specifications

  • Technical grade; specifications defined by purity and moisture content
  • Quality measured by boron oxide equivalent within the batch
  • Packaging from small bags to bulk quantities

Other Names (Synonyms)

potassium borate|Dipotassium tetraborate|RefChem:175432|Boron potassium oxide (B4K2O7)|Potassium borate (K2B4O7)|ZV5114S322|Boric acid, dipotassium salt

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What are the physical properties of Potassium tetraborate?

Density 0.4-0.7 g/cm³
Color white crystals, crystalline powder
Form white crystalline powder
Water Solubility soluble 4 parts H2O; slightly soluble alcohol [MER06]

How is Potassium tetraborate classified and handled safely? Learn More

Warning
GHS08· Health Hazard GHS07· Irritant

Hazard Statements

H335 May cause respiratory irritation
H361 Suspected of damaging fertility or the unborn child

Precautionary Statements

P203 Obtain, consult and follow expert instructions for use.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P271 Use only outdoors or in a well-ventilated area.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
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