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Commission Directive 2008/84/EC (repealed)Show full title

Commission Directive 2008/84/EC of 27 August 2008 laying down specific purity criteria on food additives other than colours and sweeteners (Text with EEA relevance) (Codified version) (repealed)

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E 290 CARBON DIOXIDE

SynonymsCarbonic acid gas
Dry ice (solid form)
Carbonic anhydride
Definition
Chemical nameCarbon dioxide
Einecs204-696-9
Chemical formulaCO2
Molecular weight44,01
AssayContent not less than 99 % v/v on the gaseous basis
DescriptionA colourless gas under normal environmental conditions with a slight pungent odour. Commercial carbon dioxide is shipped and handled as a liquid in pressurised cylinders or bulk storage systems, or in compressed solid blocks of ‘dry ice’. Solid (dry ice) forms usually contain added substances, such as propylene glycol or mineral oil, as binders
Identification
A.Precipitation (Precipitate formation)
When a stream of the sample is passed through a solution of barium hydroxide, a white precipitate is produced which dissolves with effervescence in dilute acetic acid
Purity
Acidity915 ml of gas bubbled through 50 ml of freshly boiled water must not render the latter more acid to methylorange than is 50 ml freshly boiled water to which has been added 1 ml of hydrochloric acid (0,01 N)
Reducing substances, hydrogen phosphide and sulphide915 ml of gas bubbled through 25 ml of ammoniacal silver nitrate reagent to which has been added 3 ml of ammonia must not cause clouding or blackening of this solution
Carbon monoxideNot more than 10 μl/l
Oil contentNot more than 0,1 mg/l

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