Anti dumping duty on Sodium Formaldehyde Sulphoxylate imposed, with differentiated exporter and producer based rates and currency conversion rule. Provisional anti dumping duty is imposed on Sodium Formaldehyde Sulphoxylate (SFS) imports under tariff item 28311020 originating in or exported from the People's Republic of China, based on findings of dumping, material injury, and causation. The notification prescribes producer and exporter specific duty rates in US dollars per metric tonne, distinguishes a named producer and exporter from others, and applies higher rates to other producers and indirect export scenarios. Duty is payable in Indian currency and conversion follows Government exchange rate notifications with the bill of entry date as the relevant date.