§ 721.3550 Dipropylene glycol dimethyl ether.

(a) Chemical substances and significant new uses subject to reporting. (1) The chemical substance identified as dipropylene glycol dimethyl ether (PMN P-93-507; CAS No. 111109-77-4) is subject to reporting under this section for the significant new uses described in paragraph (a)(2) of this section. This class 2 substance is exempt from the notification requirements of this rule if it contains less than 5 percent by weight of the specific isomer, propane, 2,2′-oxybis[1-methoxy- (CAS No. 189354-80-1), which is one of the possible products of the manufacturing process for PMN P-93-507.