# Regulation (EC) No 648/2004 of the European Parliament and of the Council of 31 March 2004 on detergents (Text with EEA relevance), Division 1.3: Synthetic sewage

Extent: E+W+S+N.I.

A synthetic sewage is employed for the test. Dissolve in each litre of tap water:
160 mg peptone;
110 mg meat extract;
30 mg urea, CO(NH2)2;
7 mg sodium chloride, NaCl;
4 mg calcium chloride, CaCl2.2H2O;
2 mg magnesium sulphate, MgSO4.7H2O;
28 mg of di-potassium hydrogen phosphate, K2HPO4;
and 10 ± 1 mg of the surfactant.
The synthetic sewage is freshly prepared daily.

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Source: https://www.legislation.gov.uk/eur/2004/648/annex/VIII/division/1/division/1.3 (the official version)
Page: https://openlegislation.uk/eu-regulation-2004-648/annex-VIII/division-1/division-1.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.