14459-95-1

CAS Nr.:

14459-95-1

Tetrapotassium hexacyanoferrate

EINECS Name:

Tetrapotassium hexacyanoferrate

237-722-2

EINECS Nr.:

237-722-2

Tetrakaliumhexacyanoferrat Trihydrat / Kaliumhexacyanoferrat(II) Trihydrat / Kaliumferrocyanid

Synonym:

Tetrakaliumhexacyanoferrat Trihydrat / Kaliumhexacyanoferrat(II) Trihydrat / Kaliumferrocyanid

Potassium hexacyanoferrate, also known as potassium ferrocyanide, is a chemical compound with the formula K4[Fe(CN)6].3H2O. This substance is significant in the chemical industry and is characterized by specific physical properties that make it suitable for various applications.

Physical Properties of Potassium Hexacyanoferrate

Potassium hexacyanoferrate appears as light yellow, odorless crystals. It is highly soluble in water, forming a clear, colorless solution. The solubility in water is about 28 g/100 ml at 20°C. The density of the compound is approximately 1.85 g/cm³. Potassium hexacyanoferrate has a melting point of around 70°C, at which it decomposes into crystal water. The compound is also non-flammable and remains stable under normal conditions.

Applications of Potassium Hexacyanoferrate

Potassium hexacyanoferrate is used in the food industry as an additive, particularly as an anti-caking agent in salt and salt substitutes. It prevents clumping and ensures that the salt remains free-flowing. In the European Union, it is approved as a food additive under the code E536 and is subject to stringent safety regulations.

In analytical chemistry, potassium hexacyanoferrate is widely used as a reagent. It is employed for the detection of iron ions (Fe²⁺ and Fe³⁺) and other metals in various samples. Through its specific reactions, it aids in the qualitative and quantitative analysis of metals in laboratory investigations.

Another significant application of potassium hexacyanoferrate is in traditional photography and the production of blueprints, also known as cyanotyping. Through its reaction with other chemicals, it creates light-sensitive coatings that, upon exposure and development, produce blue prints.

In water treatment, potassium hexacyanoferrate is used as a flocculant. It helps remove heavy metals and other contaminants from wastewater and drinking water. By forming insoluble complexes, it effectively filters out pollutants from water, leading to improved water quality.

In conclusion, potassium hexacyanoferrate is an important raw material in various industries due to its physical properties and versatile applications. Whether in the food industry, analytical chemistry, photography, or water treatment, this chemical compound contributes significantly to technological and industrial advancements.