Diglycolic acid, with the CAS number 110-99-6 and molecular formula C₄H₆O₅, is an aliphatic dicarboxylic acid that appears as a colorless or white rhombic crystalline solid at room temperature. Also known by synonyms such as 2,2'-oxydiacetic acid and oxodiacetic acid, it has a molecular weight of 134.09 g/mol and boasts unique chemical properties that make it versatile across multiple industrial and scientific fields.
In terms of physical and chemical properties, diglycolic acid has a melting point of 142-145℃. Its acidity falls between acetic acid and oxalic acid, and it remains stable under normal temperature and pressure, but should avoid contact with strong oxidants. It is also hygroscopic, meaning it can absorb moisture from the environment, which should be noted during storage.
The product has a wide range of applications. In industrial cleaning, its basic solutions are widely used to remove limestone deposits in gas and oil bores, heat exchangers, and steam boilers. In the plastic industry, its diesters with branched higher alcohols serve as PVC softeners, with properties comparable to di-n-octyl phthalate (DOP). It is also a key component in synthesizing biocompatible and biodegradable polyesters, which are used in tissue adhesives, cartilage substitutes, and implant materials, as well as seawater-degradable packaging materials to alleviate marine pollution.
Additionally, it acts as a complexing agent and organic synthesis intermediate, and is used as an active component in solder flux to remove metal oxides and improve solder wettability. Regarding safety, it is a corrosive substance (hazard code C) that is harmful if swallowed and can cause burns; proper protective equipment should be worn during handling, and it should be stored below 30℃ in a dry environment.
With its excellent solubility, reactivity, and biocompatibility, diglycolic acid is a crucial chemical raw material, widely used in chemical synthesis, plastic processing, medical materials, and industrial cleaning, providing reliable support for various high-tech and traditional industries.
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