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Benzoic acid ，Benzoic acid, also known as benzoic acid, is a white needle-like or flaky crystal with a faint benzaldehyde odor. It is slightly soluble in cold water and readily soluble in hot water, ethanol, ether and other organic solvents.

Sodium bicarbonate ，Baking soda, commonly known as baking soda, is a white crystalline powder, odorless and salty in taste. It is highly soluble in water, and its aqueous solution is weakly alkaline. When heated, it readily decomposes to form sodium carbonate, carbon dioxide and water

Main uses：Gold panning

Main features：

1、Non-toxic

2、Environmental protection

3、High leaching rate

4、It can replace sodium cyanide

Application scenarios：Extracted from gold ore

Mercury, chemically known as mercury (Hg), Extracting gold from mercury，Mercury thermometers and mercury sphygmomanometers are the most representative products in this field.

Calcium hypochlorite ，Bleaching powder, commonly known as bleaching powder, is a highly efficient inorganic chlorine-containing disinfectant.

Citric acid， It is an organic acid that naturally exists in citrus fruits and can also be produced on a large scale through biological fermentation processes. It appears as colorless transparent crystals or white powder, odorless, extremely sour in taste, and readily soluble in water and ethanol. It has multiple functions such as acidity regulation, chelation, scale removal, and preservation and anti-corrosion.