To extend the temporary suspensions of duty on N1,N4,N4,-Tris (2-hydroxyethyl)-2-nitro-1,4-phenylenediamine; N1, N4-Dimethyl -N1-(2-hydroxyethyl)-3-nitro-1,4-phenylenediamine; N1,N4-Dimethyl-N1 (2,3-dihydroxypopyl)-3-nitro-1,4-phenylenediamine; N1-(2-Hydroxyethyl) -3-nitro-1,4-phenylenediamine and N1-(2-Hydroxyethyl)-2-nitro-1, 4-phenylenediamine.

Amends the Harmonized Tariff Schedule of the United States to extend, through December 31, 1992, the suspension of duty on: (1) N1,N4,N4,-tris (2-hydroxyethyl)-2-nitro-1,4-phenylenediamine; (2) N1,N4-dimethyl-N1-(2- hydroxyethyl)-3-nitro-1,4-phenylenediamine; (3) N1,N4-dimethyl-N1-(2,3- dihydroxypropyl)-3-nitro-1,4-phenylenediamine; (4) N1-(2-hydroxyethyl)-3- nitro-1,4-phenylenediamine; and (5) N1-(2-hydroxyethyl)-2-nitro-1,4-phenylenediamine.