YuanLei little knowledge | The difference between barium sulfate(BaSO4) and barium sulfite(BaSO3)

Release time:

2024-02-29 15:13

Barium sulfate and barium sulfite only a word difference is two different substances, this article will take you to understand the difference between barium sulfate and barium sulfite.

【Barium sulfate(BaSO4)】

Barium sulfate is also known as barite, is a natural ore, the general shape of the bifurcated crystal block, the color is mainly determined by the type and number of impurities it contains, pure barite is colorless and transparent. Barium sulfate powder is selected natural barium sulfate ore after cleaning, grinding, drying and other processes made, its impurities are more, the quality is mainly determined by the mine itself, but its price is low, usually used in white pigment production or low-grade coatings, plastics, ink industry as a filler.



【Barium sulfite(BaSO3)】

Barium sulfite, white equiaxed cubic crystal, sometimes light gray or yellowish-green, industrial products for light brown or black powder. It is mainly used in the manufacture of barium salt, Lide powder and luminous paint, and also used as rubber vulcanization agent and leather hair removal agent. Also used in paper making.




1. physical properties: barium sulfite slightly soluble in water, insoluble in alcohol; Barium sulfate odorless, tasteless powder, soluble in hot concentrated sulfuric acid, almost insoluble in water, dilute acid, alcohol.

2. use: barium sulfite is mainly used in the production of sulfite, barium sulfite, barium sulfite precipitation, etc.; Barium sulfate is mainly used in the production of white pigments, low-grade coatings, plastics, ink and so on.

【Identification method】

When identifying sulfite and sulfate, barium nitrate solution acidified by dilute nitric acid cannot be used for testing, because hydrogen ions have strong oxidation when they meet nitrate ions, and it is easy to oxidize sulfite into sulfate. Barium chloride solution should be added separately to produce precipitation, dilute hydrochloric acid should be added to dissolve the precipitation, the irritating gas can be smelt, the fuchsin solution should be introduced, the solution should fade, and the solution should be reheated to restore the color, which proves that the original substance is barium sulfite.

barium sulfate,distinction

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The appearance of precipitated barium sulfate is a white amorphous powder, with a relative density of 4.50 (15 ℃) and a melting point of 1580 ℃. Due to its high refractive index (1.63-1.65), it exhibits a relatively white color and a certain degree of covering power. It is almost insoluble in water, ethanol, and acid, soluble in hot sulfuric acid. It is easy to form mixed crystals with potassium permanganate, calcium carbonate, or metal nitrates, and can be reduced to barium sulfide with carbon at high temperatures.

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