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Paragraph 3.3 Reagents

Northern Ireland Not yet in force

Changes not yet applied. Later legislation changes this provision in ways not yet written into the text below:

Neutral ethanolic formaldehyde solution: mix an appropriate volume of formaldehyde solution (3.2) containing 17.5 g of formaldehyde with 250 ml water and 500 ml ethanol. Adjust the pH of the solution to 7.0 with 0.1N sodium hydroxide solution. Dilute to 1,000 ml with water, mix and again adjust the pH to 7.0 if necessary.