This document specifies a method for the determination of the cold and hot water insoluble nitrogen content in solid urea formaldehyde and methylene urea slow-release fertilizers and for the determination of the solubility of nutrient polymers in a phosphate buffer solution with a pH of 7,5 at 100 °C, in their pure form in inorganic fertilizers.
This document is not applicable to the following nutrient polymers: liquid methylene urea.
NOTE: If the word "harmonized" (marked in green) is not found in the field with the name of the directive, it means that the European standard is not cited in the OJEU.
PUBLISHED
SRPS CEN/TS 17403:2021
PROJECT
dnaSRPS EN 17403:2025
50.20
Proof sent to secretariat or FDIS ballot initiated: 8 weeks
Oct 15, 2026
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