Alum, or 'квасцы' in Russian, is a versatile product commonly used for a variety of purposes. It is a double sulfate salt that is often found in crystal form, resembling small, clear to white stones. Alum is widely known for its use in water purification, as it helps to coagulate impurities, making them easier to filter out. It is also used in the culinary industry, particularly in pickling and preserving foods, as it helps to maintain crispness and prevent spoilage. In addition to these uses, alum is used in the health and beauty industry, often found in deodorants and aftershaves for its antibacterial properties. Its astringent qualities make it helpful in reducing bleeding in minor cuts and abrasions. The product's multifunctionality and natural origin make alum a valuable addition to any household.