- Y Diweddaraf sydd Ar Gael (Diwygiedig)
- Pwynt Penodol mewn Amser (10/11/2010)
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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purity criteria on food additives other than colours and sweeteners (Text with EEA relevance) (Codified version) (repealed)
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Version Superseded: 01/12/2012
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Synonyms | PEG, Macrogol, Polyethylene oxide |
Definition | Addition polymers of ethylene oxide and water usually designated by a number roughly corresponding to the molecular weight |
Chemical name | alpha-Hydro-omega-hydroxypoly (oxy-1,2-ethanediol) |
Chemical formula | HOCH 2 - (CH 2 - O - CH 2 ) n - CH 2 OH |
Average molecular weight | 380 to 9 000 D |
Assay | PEG 400: Not less than 95 % and not more than 105 % PEG 3000: Not less than 90 % and not more than 110 % PEG 3350: Not less than 90 % and not more than 110 % PEG 4000: Not less than 90 % and not more than 110 % PEG 6000: Not less than 90 % and not more than 110 % PEG 8000: Not less than 87,5 % and not more than 112,5 % |
Description | PEG 400 is a clear, viscous, colourless or almost colourless hygroscopic liquid PEG 3000, PEG 3350, PEG 4000, PEG 6000 and PEG 8000 are white or almost white solids with a waxy or paraffin-like appearance |
Identification | |
---|---|
Melting point | PEG 400: 4-8 °C PEG 3000: 50-56 °C PEG 3350: 53-57 °C PEG 4000: 53-59 °C PEG 6000: 55-61 °C PEG 8000: 55-62 °C |
Viscosity | PEG 400: 105 to 130 mPa.s at 20 °C PEG 3000: 75 to 100 mPa.s at 20 °C PEG 3350: 83 to 120 mPa.s at 20 °C PEG 4000: 110 to 170 mPa.s at 20 °C PEG 6000: 200 to 270 mPa.s at 20 °C PEG 8000: 260 to 510 mPa.s at 20 °C For polyethylene glycols having a average molecular weight greater than 400, the viscosity is determined on a 50 per cent m/m solution of the candidate substance in water |
Solubility | PEG 400 is miscible with water, very soluble in acetone, in alcohol and in methylene chloride, practically insoluble in fatty oils and in mineral oils PEG 3000 and PEG 3350: very soluble in water and in methylene chloride, very slightly soluble in alcohol, practically insoluble in fatty oils and in mineral oils PEG 4000, PEG 6000 and PEG 8000: very soluble in water and in methylene chloride, practically insoluble in alcohol and in fatty oils and in mineral oils |
Purity | |
Acidity or alkalinity | Dissolve 5,0 g in 50 ml of carbon dioxide-free water and add 0,15 ml of bromothymol blue solution . The solution is yellow or green. Not more than 0,1 ml of 0,1 M sodium hydroxide is required to change the colour of the indicator to blue |
Hydroxyl value | PEG 400: 264-300 PEG 3000: 34-42 PEG 3350: 30-38 PEG 4000: 25-32 PEG 6000: 16-22 PEG 8000: 12-16 |
Sulphated ash | Not more than 0,2 % |
1,4-Dioxane | Not more than 10 mg/kg |
Ethylene oxide | Not more than 0,2 mg/kg |
Ethylene glycol and diethylene glycol | Total not more than 0,25 % w/w individually or in combination |
Lead | Not more than 1 mg/kg] |
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