Section 176.140 - Segregation from other classes of hazardous materials(a) Class 1 (explosive) materials must be segregated from other packaged hazardous materials in accordance with § 176.83 .(b) Class 1 (explosive) materials must be segregated from bulk solid dangerous cargoes in accordance with the IMDG Code (IBR, see § 171.7 of this subchapter). Notwithstanding § 176.83(b) , ammonium nitrate and sodium nitrate may be stowed together with blasting explosives, except those containing chlorates, provided the mixed stowage is treated as blasting explosives (see § 176.410(e) ).Amdt. 176-30, 55 FR 52696, Dec. 21, 1990, as amended at 68 FR 45041 , July 31, 2003; 68 FR 75748 , Dec. 31, 2003