Section 721.4500 - Isopropylamine distillation residues and ethylamine distillation residues(a)Chemical substances and significant new use subject to reporting.(1) The following chemical substances referred to by their Chemical Abstracts Service (CAS) register numbers and chemical names are subject to reporting under this section for the significant new use identified in paragraph (a)(2) of this section: CAS No. 79771-08-7, isopropylamine distillation residues, and CAS No. 79771-09-98, ethylamine distillation residues.(2) The significant new use is use in metalworking fluids.(b)Specific requirements. The provisions of subpart A of this part apply to this section except as modified by this paragraph.(1)Notice Requirements and Procedures. Section 721.10 applies to this section, except persons submitting a notice must complete only Parts I and III of the notice form.49 FR 46378, Nov. 26, 1984. Redesignated at 51 FR 23539, June 30, 1986, and 53 FR 2845, Feb. 2, 1988. Further redesignated at 58 FR 29946, May 24, 1993, as amended at 58 FR 34204, June 23, 1993 Sec. 5 , Pub. L. 94-469 , 90 Stat. 2012 (15 U.S.C. 2604 )