Escin, a natural triterpene saponin mixture extracted from Horse Chestnut seeds, is widely used in pharmaceuticals, cosmetics and fine chemicals. In pharmacy, it serves as a key active ingredient in anti-edema and venous-tonic drugs, effectively reducing vascular permeability, inhibiting tissue fluid accumulation and improving blood circulation; it is clinically applied to treat chronic venous insufficiency, varicose veins and postoperative swelling. In cosmetics, it acts as a skin-protective and anti-aging agent, enhancing skin microcirculation, reducing puffiness (especially eye bags), soothing inflammation and improving skin elasticity; it is commonly added to eye creams, serums and anti-wrinkle products. In fine chemical research, it functions as a natural surfactant, emulsifier and chiral intermediate for synthesizing complex glycoside derivatives. Additionally, it is used in veterinary medicine and plant protection formulations due to its anti-inflammatory and antifungal activities, making it a versatile natural bioactive compound with high commercial value.

Escin is classified as harmful if swallowed or inhaled (GHS category 4) and may cause drowsiness or dizziness. Inhalation of dust irritates the respiratory tract, causing cough, sore throat and discomfort; high concentrations may induce headache, vertigo and nausea. Skin contact may trigger mild irritation, redness or allergic dermatitis in sensitive individuals; prolonged contact should be avoided. Eye contact leads to severe stinging, tearing and conjunctival redness; immediate rinsing with plenty of water for 15+ minutes is required. Accidental ingestion causes gastrointestinal irritation, nausea, vomiting and abdominal pain; large doses may affect liver/kidney function. Operate in a fume hood with dust respirator, chemical-resistant gloves and safety goggles. Store sealed, dry and away from food, feed and oxidants. Dispose of waste per hazardous waste regulations to avoid water/soil contamination. Though generally safe for topical use in cosmetics, oral administration requires medical supervision due to potential systemic toxicity.