Anti-dumping duty continuation on caustic soda to prevent dumped imports and protect domestic industry under customs framework Continuation of anti-dumping duty is imposed on imports of Sodium Hydroxide (caustic soda) under headings 2815 11 and 2815 12 after a sunset review found continued dumping from specified countries causing material injury; the notification prescribes country-, producer- and exporter-specific duty rates calculated as the difference between specified foreign-currency benchmark amounts per unit and the landed value of imports, requires payment in Indian currency, defines landed value per the Customs Act, and specifies the exchange-rate rule tied to the bill-of-entry date.