Active standard | Published: 01/12/1972

ISO 2227:1972

Formaldehyde solutions for industrial use — Determination of formaldehyde content
(Solutions de formaldéhyde a usage industriel — Dosage du formaldéhyde)

Available languages: English, French

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Detail information

Designation: ISO 2227:1972

Publication date: 01/12/1972

Pages: 2

Country: International technical standard

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Anotation

Description / Abstract: The specified method is applicable to HCHO contents between 25 5 and 45 %. The field of application may be extended by siutably modifying the mass of the test portion. The principle consists in the reaction of the test solution with a neutral sodium sulphite solution, and acidimetric titration of the liberated sodium hydroxide in presence of thymolphthalein as indicator.

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