(a) * * *
(1) The chemical substance identified as D-Glucuronic acid, polymer with 6-deoxy-L-mannose and D-glucose, acetate, calcium magnesium potassium sodium salt (PMN P-00-7; SNUN S-05-1; SNUN S-06-4; SNUN S-07-03; and SNUN S-07-5; CAS No. 125005-87-0) is subject to reporting under this section for the significant new use described in paragraph (a)(2) of this section.
(2) * * *
(i) Industrial, commercial, and consumer activities. Requirements as specified in Sec. 721.80. The significant new use is any use other than manufacture of the substance where greater than 5 percent of the chemical substance consists of particle sizes below 10 microns.
* * * * *