Citric Acid (C6H8O7, CAS 77-92-9) is a weak organic acid belonging to the class of tricarboxylic acids. It naturally occurs in citrus fruits and is commercially produced by fermentation using Aspergillus niger or extraction from citrus fruit byproducts. The resulting anhydrous powder is highly soluble in water, allowing it to dissociate into citrate ions and hydrogen ions when dissolved. This dissociation capacity makes it a versatile pH modifier and buffer in industrial processes.
In food processing, Citric Acid acts as an acidulant, meaning it imparts sourness while regulating pH levels for product stability and flavor enhancement. Its chelating ability allows it to bind metal ions such as calcium, iron, and magnesium, thereby preventing discoloration and oxidation reactions. This makes it valuable in detergents where water hardness can reduce cleaning efficacy.
Technically, Citric Acid exhibits a melting point of approximately 153 °C and a density near 1.665 g/cm³ when dry. Due to its acidic nature, appropriate handling measures must be followed to prevent equipment corrosion and ensure safe storage. Commercial grades vary in purity depending on application—food grade, pharmaceutical grade, and technical grade—so confirming specific certifications with Zenco Systems Ltd is essential.
Performance characteristics like solubility, buffering capacity, and chelating action define its role across sectors. Its biodegradability and low toxicity make it a preferred choice for applications where environmental impact is a concern. Moreover, its stability under typical processing conditions supports product consistency from batch to batch.