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CN2839
28 Inorganic Chemicals, Organic or Inorganic Compounds of Precious Metals, of Rare-earth Metals, of Radioactive Elements or of Isotopes
2839 (01/1988-..) Silicates, Commercial Alkali Metal Silicates (Excl. Inorganic or Organic Compounds of Mercury)
28391100 (01/1988-..) Metasilicates of Sodium, Incl. Commercial Metasilicates
28391900 (01/1988-..) Silicates of Sodium, Incl. Commercial Silicates (Excl. Sodium Metasilicates)
28392000 (01/1988-12/2006) Silicates of Potassium, Incl. Commercial Silicates
28399000 (01/2012-..) Silicates, Incl. Commercial Alkali Metal Silicates (Excl. Sodium Silicates)
28399010 (01/2007-12/2011) Silicates of Potassium, Incl. Commercial Silicates
28399090 (01/2007-12/2011) Silicates, Incl. Commercial Alkali Metal Silicates (Excl. Sodium and Potassium Silicates)