The Formic Acid for Leather and Textile segmentation by application divides the market into three primary uses: tanning, dyeing, and finishing. Tanning consumes the largest share, accounting for roughly 45 % of total volume, because formic acid acts as a pH regulator and accelerator in chrome and vegetable tanning processes, directly influencing leather yield and quality. Dyeing represents about 30 % of the market; the acid stabilizes dye baths, ensures uniform color uptake, and reduces the incidence of uneven shading, which is critical for both apparel fabrics and upholstery. Finishing comprises the remaining 25 %, where formic acid is employed to modify surface tension, improve water repellency, and enhance mechanical properties of treated textiles. Each application contributes proportionally to the overall market size, with demand driven by production levels in the leather and textile sectors, regulatory constraints on alternative chemicals, and the cost‑effectiveness of formic acid as a low‑toxicity catalyst.