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Potassium thiosulfate

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Potassium thiosulfate Basic information

Product Name:
Potassium thiosulfate
Synonyms:
  • thiosulfuricacid(h2s2o3),dipotassiumsalt
  • Thiosulfuricacid,dipotassiumsalt
  • POTASSIUM THIOSULFATE
  • POTASSIUM HYPOSULFITE
  • potassium thiosulphate
  • POTASSIUM THIOSULFATE, 75% SOLUTION IN W ATER
  • PotassiumThiosulfateK2S2O3
  • Potassium thiosulfate solution
CAS:
10294-66-3
MF:
H3KO3S2
MW:
154.24
EINECS:
233-666-8
Product Categories:
  • Inorganic Salts
  • Potassium
  • Inorganics
  • Synthetic Reagents
Mol File:
10294-66-3.mol
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Potassium thiosulfate Chemical Properties

Density 
1.484 g/mL at 25 °C
solubility 
insoluble in ethanol
form 
colorless hygroscopic crystals
color 
colorless hygroscopic crystals, crystalline
Water Solubility 
g/100g H2O: 96.1 (0°C), 165.0 (25°C), 312.0 (90°C); solid phase, K2S2O3 · 2H2O (0°C), 3K2S2O3 ·5H2O (25°C), K2S2O3(90°C) [KRU93]; insoluble alcohol [MER06]
Merck 
13,7777
Stability:
Stable. Incompatible with strong acids, strong oxidizing agents.
CAS DataBase Reference
10294-66-3(CAS DataBase Reference)
EPA Substance Registry System
Thiosulfuric acid (H2S2O3), dipotassium salt (10294-66-3)
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Safety Information

Hazard Codes 
Xi
Risk Statements 
36/38
Safety Statements 
26-36
WGK Germany 
3
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Potassium thiosulfate Usage And Synthesis

Description

Potassium thiosulfate (KTS) is a liquid fertilizer that supplies potassium and sulfur. Potassium thiosulfate is a neutral to basic, chloride-free, clear, liquid solution that can be applied through fertigation alone or in liquid blends with urea solution, urea ammonium nitrate solutions, and 10-34-0. Very dilute potassium thiosulfate can be used as a foliar fertilizer on certain plants, but is known to cause phytotoxicity symptoms under certain conditions and should be used with caution. Potassium thiosulfate is pH sensitive and becomes unstable at pH below 5.5 and above 8.5. The elemental sulfur in thiosulfate will oxidize and generate sulfuric acid that can lower soil and media pH. Greenhouse and nursery managers should use caution when applying potassium thiosulfate to unbuffered soilless media.

Chemical Properties

white crystalline powder

Uses

Potassium thiosulfate can be used:

  • For the preparation of aqueous biphasic systems (ABS) for the extraction of organic compounds.
  • For the synthesis of polyacrylonitrile nanoparticles by dispersion/emulsion polymerization.
  • As a reagent for the pretreatment of graphite powder to synthesize graphene oxide from it by Hummers′ method.
  • As an initiator to synthesize organosilicon-based adsorbent to remove iron from crude phosphoric acid.

Uses

Analytical reagent.

Purification Methods

It is a good reducing agent used in analytical chemistry. [Foerster & Mommen Chem Ber 57 258 1924.]

Potassium thiosulfateSupplier

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