Three companies in Oklahoma had nameplate capacity to provide about 1.3 kt/a (3 million Ibs per year) of crude iodine. During 1988, crude iodine imports were estimated to be 3.2 kt (7 million lbs) with an average cif value of $16.77/kg ($7.55 perlb). Iodine is consumed in animal feed supplements, catalysts, inks and colorants, pharmaceuticals, photographic equipment, sanitary and industrial disinfectants, and stabilizers. Woodward Iodine Corp. continued to produce iodine from underground brines associated with small amounts of natural gas in Woodward County, OK. North American Brine Resources operated two miniplants that produced iodine from waste brine associated with crude oil production in Kingfisher County, OK. During 1988, North American drilled four wells and began construction of a facility to produce iodine near Woodward. IOChem Corp. exported about 18 tim (40,000 lbs per month) of crude iodine to the Federal Republic of Germany from production at a plant in Vici, OK. Iodine is a strategic material in the US National Defense Stockpile. On Sept. 29,1988, the National Defense Authorization Act of 1988 (Public Law 100- 456) authorized the disposal of 350 t (772,000 lbs) as payment material for upgrading contracts for stockpiled ferroalloys. The stockpile goal for iodine remained at 2.6 kt (5.8 million lbs) valued at $51.3 million. Japan continued to be a major produce of iodine as a byproduct of natural gas production. Seven companies operated plants in Chiba, Miyazaki, and Niigata Prefectures to produce an estimated 7.2 kt (16 million lbs). Chile is the second largest producer of iodine. It reported production of 3 kt (6.6 million lbs) as a byproduct of nitrate production from caliche in the Atacama Desert. During 1988, Chile completed facilities to add iodine production capacity during the year by heap leaching tailings. The Puelma plant in the Pampa Del Tamarugal was completed in 1988 with a capacity of more than 136 t (300,000 lbs) of crude iodine. Another project under construction was a plant near Iquique to produce more than 900 t/a (2 million lbs per year) of iodine as a byproduct of nitrate production.