Ammonium Citrate Dibasic, identified by its CAS number 3012-65-5, is a highly versatile chemical compound known for its significant role across numerous industries. This colorless crystalline granular or white solid is chemically formulated as (NH4)2HC6H5O7, possessing a molecular weight of 226.18. Its unique properties stem from its composition as an ammonium salt of citric acid, making it a valuable asset in both laboratory and industrial settings.

The compound typically exhibits high purity, with assays often ranging from 98.0% to 103.0%. A 5% solution in water generally shows a pH between 4.5 and 5.5, indicating its mild acidic nature, which is crucial for its function as a buffer. Rigorous quality control ensures minimal impurities such as heavy metals (often less than 5 ppm), chlorides, sulfates, and insoluble matter, highlighting its suitability for demanding applications where purity is paramount. This commitment to quality ensures reliability and consistent performance across diverse uses.

One of the primary applications of Ammonium Citrate Dibasic is in the agricultural sector, particularly for determining phosphate content in fertilizers. It serves as an effective extractant for assessing available phosphorus in mineral fertilizers, playing a critical role in agricultural soil analysis and nutrient management. Its ability to extract specific nutrient forms makes it indispensable for optimizing crop nutrition and ensuring sustainable agricultural practices.

Beyond agriculture, Ammonium Citrate Dibasic finds extensive use in the electronics industry, where it is employed in electronic etching processes. Its controlled etching capabilities are vital for precision manufacturing of electronic components. In the petrochemical industry, it acts as a complexing agent, facilitating various chemical reactions and processes. Its buffering capacity is also widely utilized to maintain stable pH levels in industrial solutions, which is essential for process efficiency and product quality.

The compound's utility extends to environmental remediation and analytical chemistry. It has been explored as an enhancing agent for electrodialytic soil remediation, particularly for soils contaminated with heavy metals like copper and chromium. It also plays a role in assessing the release of nickel from various materials and can be used for ammonium monitoring in water samples, contributing to environmental safety and compliance. As a general analytical reagent, it is invaluable in laboratories for various tests and preparations, including as a starter material for culture media in microbiology.

Furthermore, Ammonium Citrate Dibasic is used in more niche applications. It can be found in the restoration and conservation of historical artifacts, specifically for cleaning marble surfaces due to its chelating properties. In the food and beverage industry, particularly winemaking, it has been recognized for its role as a winemaking nutrient, influencing fermentation kinetics and the final sensory profiles of wines. Its diverse chemical characteristics also make it suitable as an additive in modifying the electrokinetic properties of colloidal suspensions, offering flexibility in material science applications.

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