… is mainly obtained from the ores heterogenite (hydrated oxide of cobalt), linnaeite (sulphide of cobalt and nickel) … products. After treatment to eliminate other metals, cobalt oxide is obtained, and this is reduced with carbon, …
… treated with ammonia solution to eliminate the sulphur dioxide; this product is used in medicine. The precipitated … by the action of hydrogen sulphide on a solution of sulphur dioxide containing gelatin. It may also be obtained by the …
… The articles included in this heading are square, or approximately square, with no side exceeding 60 cm in length … exceeds 60 cm and scarves of a shape other than square or approximately square ( heading 62.14 ). …
… of a kind used in the manufacture of book outer covers, boxes, spectacle or cutlery cases, knife sheaths, etc. They … a mixture of linseed oil with other substances (e.g., zinc oxide). It is usually in pieces of a size suitable for use …
… non‑isolated in the free state and derived from silicon dioxide (heading 28.11). (1) Sodium silicates . Obtained … silicates . White powders used for manufacturing barium oxide and optical glass. (6) Lead silicates . Occur as …
… mineral (barium sulphate, calcium sulphate, aluminium oxide, China clay, talc, silica, siliceous fossil earth, … colouring matter (heading 32.04) with a high resistance to oxidation, such as azo dyes, vat dyes derived from …
