Used in leather tanning to stabilize collagen structure, making hides more durable and resistant to decay. Commonly applied in corrosion inhibition, where it forms protective layers on metal surfaces, especially in cooling water systems. Employed in the pharmaceutical industry for its astringent properties, found in treatments for diarrhea, sore throats, and minor skin irritations. Utilized in wine and beverage production to reduce bitterness and remove haze-causing compounds. Acts as a natural antioxidant and stabilizer in some food products. Also used in laboratory settings as a reagent for detecting alkaloids and heavy metals due to its ability to form complexes.