What is Formalin Index?

The Formalin Index is a measure used to indicate the concentration of formaldehyde in a solution, particularly in the context of fish preservation. It is calculated as the percentage of formaldehyde in a formalin solution, typically expressed as grams of formaldehyde per liter of solution. The index helps assess the quality and safety of preserved fish products, as formaldehyde is a common preservative but can be toxic in high concentrations. Maintaining an appropriate Formalin Index is crucial for ensuring food safety and compliance with regulatory standards.