Blanc fixe

Blanc fixe is a white, crystalline, inorganic compound that is chemically inert, insoluble and non-toxic. It is primarily used as a base for lake pigment and as a filler or extender in paint, paper, and rubber products. In addition, it is also used in the manufacture of glass, ceramics, cosmetics, and pharmaceuticals.

History

The term "blanc fixe" is French for "permanent white". It was first produced in the 18th century by the French chemist Jean-Baptiste Dumas. The production process involves the reaction of barium sulfate with sulfuric acid, resulting in a white precipitate.

Production

The production of blanc fixe involves the reaction of highly purified solutions of barium chloride and sodium sulfate. The resulting product is then filtered, washed and dried. The process is carefully controlled to ensure that the product has the desired properties, such as particle size and brightness.

Uses

Blanc fixe is used in a wide range of applications due to its chemical stability, high brightness, and low oil absorption. It is used as a filler in paints, plastics, and rubber. It is also used in the production of glass and ceramics, in cosmetics as a pigment, and in pharmaceuticals as a filler.

Health and safety

Blanc fixe is non-toxic and is not considered a health hazard. However, like any fine powder, it can cause irritation if it comes into contact with the eyes or if it is inhaled. Therefore, appropriate safety measures should be taken when handling this substance.

See also

• Barium sulfate
• Pigment
• Filler (materials)