GB 1903.74-2025: National food safety standard - Nutrition fortifier - L-methionine

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Scope

This Standard applies to the food nutrition fortifier L-methionine, which is obtained by
fermentation, extraction and refinement with edible starch or sugariness as the main raw
material; or by enzymatic resolution and refinement with DL-methionine as the raw material.
2 Chemical Name, Molecular Formula, Structural Formula
and Relative Molecular Mass
2.1 Chemical Name
L-2-amino-4-(methylthio) butyric acid
2.2 Molecular Formula
C5H11NO2S
2.3 Structural Formula
2.4 Relative Molecular Mass
149.21 (in accordance with the 2022 international relative atomic mass)

Basic Data

Standard ID	GB 1903.74-2025 (GB1903.74-2025)
Description (Translated English)	National food safety standard - Nutrition fortifier - L-methionine
Sector / Industry	National Standard
Classification of Chinese Standard	X09
Word Count Estimation	9,956
Date of Issue	2025-03-16
Date of Implementation	2025-09-16
Issuing agency(ies)	National Health Commission of the People's Republic of China, State Administration for Market Regulation