4B Acid price December 2025 and outlook (see chart below) (see chart):
- Northeast Asia:US$1.41/KG, -1.4% down
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Market developments for Chemicals in Northeast Asia for December 2025
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4B Acid price index
This post is a summary of the 4B Acid price developments since 2017. The price developments are expressed as a price index in US$ prices converted at current FX rates, which are the FX rates applicable at the time the price was valid. 4B Acid price index developments are calculated from multiple separate sources of data to ensure statistical accuracy
Further information on 4B Acid
Here is further information
What is 4B acid
4B acid, or 4-Aminotoluene-3-sulfonic acid, also known as ATSA or 4-amino-3-toluenesulfonic acid, is a chemical compound that is used as an intermediate in the production of a number of chemicals, including dyes, pigments, and pharmaceuticals. It is a white, crystalline solid with a molecular formula of C7H9NO3S.
How is 4B acid produced
4-Aminotoluene-3-sulfonic acid is typically produced by the sulfonation of 4-aminotoluene, which is a process that involves the addition of sulfuric acid to the amine. The resulting product is then purified and isolated to produce 4-aminotoluene-3-sulfonic acid.
What is 4B acid used for
4-Aminotoluene-3-sulfonic acid is used as an intermediate in the production of a number of chemicals, including dyes, pigments, and pharmaceuticals. It is also used in the production of certain types of resins and in the synthesis of other chemicals.
It is worth noting that 4-aminotoluene-3-sulfonic acid can be toxic if ingested or inhaled in large amounts, and it can cause irritation to the skin and eyes. As a result, it is important to handle this chemical with caution and to follow proper safety procedures when working with it.