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Guidance on how to prepare potassium metabisulfite and sodium metabisulfite solutions.
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Risk assessment information for sodium and potassium metabisulfites, bisulfites and sulphites.
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Using these sodium salts safely in practical work, Includes metabisulfite and the equivalent  potassium salts. Sodium sulfite is also known as sodium sulfate(IV), sodium hydrogensulfite  as sodium hyd.. more
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General risk assessment information for tin(IV) oxide, tin(IV) chloride and tin(IV) iodide. 
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Guidance on how to prepare cerium(IV) sulfate(VI) and ammonium cerium(IV) sulfate(VI) solutions.
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Includes information on: lead metal, lead(II) carbonates, lead(II) oxide, lead(IV) oxide, dilead(II) lead(IV) oxide (red lead) and lead(II) sulfide (galena).
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Risk assessment information for silicon(IV) chloride (silicon tetrachloride). 
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Risk assessment information for silicon and silicon(IV) oxide (silica). Also includes information on mineral wools and silica gels (self-indicating and non-indicating).
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The additional negative ions test tube reactions for nitrate(III), nitrate(V), sulfate(IV), phosphate and carboxylates (methanoate and ethanoate).
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Silicon(IV) chloride, also known as silicon tetrachloride, is supplied in bottles where, over time, the top becomes dangerously stuck. This guide describes how to safely prepare the chemical in situ, .. more
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