What are the Common Names of Sodium Hydrosulfide?

When you think of sodium hydrosulfide, you may first recall its chemical formula NaHS and its various chemical properties. However, in practical production and applications, people often use vivid, descriptive common names to refer to it. So, what is the most widely used common name for sodium hydrosulfide?

As an important inorganic chemical raw material, sodium hydrosulfide is most commonly known as acid sodium sulfide. This name does not imply that the substance itself is acidic; instead, it is closely related to its chemical composition and properties. The formula of normal sodium sulfide is Na₂S, while sodium hydrosulfide (NaHS) can be seen as the product of replacing one sulfide ion in sodium sulfide with a hydrogen sulfide ion (HS⁻). Compared with normal sodium sulfide, sodium hydrosulfide has an extra hydrogen atom, which gives its aqueous solution a slightly acidic tendency—or, more precisely, its aqueous solution is less alkaline than that of sodium sulfide. Hence the name "acid sodium sulfide". This term is widely used in industries such as chemical manufacturing, textile printing and dyeing, and leather tanning, and has become almost synonymous with sodium hydrosulfide.

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