Sodium Hydroxide in Aqueous Solution (Soda Lye / Liquid Soda)

Liquid caustic soda — traded as soda lye or liquid soda — is a high-volume commodity in the chlor-alkali supply chain, widely used in alumina refining, textile processing, and municipal water treatment. Classified under a single tariff line (2815120000), it is typically shipped in bulk tank containers or ISO tanks, making freight logistics and concentration specifications central to commercial contracts. Japan and Canada are the primary foreign sources for US buyers, with Taiwan and South Korea also contributing meaningfully to import volumes.