Why does the bottle swell after sodium oxide salts (STDA) are prepared into a solution?
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Why does the bottle swell after sodium oxide salts (STDA) are prepared into a solution? Sodium oxide salts (STDA) have properties such as dust and oil removal from metal surfaces, emulsification, dispersion, sterilization, suitability for use in household cleaning products, and good water solubility; in foam-free spray cleaning processes for oil removal, they play a role in effectively dispersing oil stains. Attention! Its aqueous solution decomposes easily and is not stable for storage; it should be used as soon as it is prepared. Prolonged storage may result in the generation of gas, and if this gas cannot be released, it may exert pressure on the container.
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Sodium oxide salt (STDA) solutions undergo decomposition during storage, releasing gases. If these gases are not released in time, it will cause the pressure inside the bottle to increase, resulting in the bottle expanding. Therefore, the prepared solution should be used as soon as possible to avoid long-term storage. .
Sodium oxide salts, also known as sodium tridecanoate (STDA), appear as colorless cubic crystals or white crystals. Soluble in water and glycerin; slightly soluble in ethanol and liquid ammonia. Insoluble in concentrated hydrochloric acid. Slightly deliquescent in air. Sodium tridecanoate can be used to prepare aqueous solutions, but it should be used promptly after preparation, as its aqueous solution tends to decompose and is not suitable for long-term storage! If gas is generated after long-term storage and cannot be released, it may rupture the container, even leading to an explosion. The swelling of the bottle is the result of gas generation from the decomposition of the STDA aqueous solution, combined with the sealing quality of the container; essentially, it is the gas produced by chemical reactions that causes an increase in pressure inside the container. When using it, it is necessary to strictly follow the product specifications, avoid long-term storage, and ensure safe operation.
This is a sodium alkylate, and its aqueous solution does not produce gas on its own. However, if the water quality used to prepare the solution or certain components in the auxiliary agents are unstable, especially under the influence of temperature and microorganisms, biochemical reactions similar to fermentation or anaerobic fermentation can occur, resulting in the generation of gases from nutrient-rich substances – which is quite normal. If such a solution is to maintain good stability, pure water that has been boiled and then cooled should be used, and during the preparation process, all other chemicals must also remain sterile and free from contamination by microorganisms from the environment.