2834 Nitrites, nitrates

2834 (01/1988-..) Nitrites, nitrates 28341000 (01/1988-..) Nitrites 28342100 (01/1988-..) Nitrate of potassium 28342200 (01/1988-12/2001) Nitrate of bismuth 28342910 (01/1988-12/1998) Nitrates of barium, of beryllium, of cadmium, of cobalt and of nickel 28342920 (01/1999-..) Nitrates of barium, of beryllium, of cadmium, of cobalt, of nickel and of lead 28342930 (01/1988-12/2006) Nitrates of copper and of mercury 28342940 (01/2007-..) Nitrates of copper 28342950 (01/1988-12/1998) Nitrate of lead 28342980 (01/2002-..) Nitrates (excl. of potassium, barium, beryllium, cadmium, cobalt, nickel, copper, lead and mercury) 28342990 (01/1988-12/2001) Nitrates (excl. of potassium, bismuth, barium, beryllium, cadmium, cobalt, nickel, copper, mercury and lead)