As revealed by MHLW announcement issued on June 6, 2019, 8 food additives were granted usage approval in Japan, including argon, Isobutylamine, sec-butylamine, propylamine, hexylamine, amylamine and 2-methylbutylamine.
"Food and Additives Specification Standard" specifies usage requirements and that there is no restriction on application of argon, while the other 7 food additives can only be used as organic solvent for fragrance improvement.
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 0606 No. 2 MHLW announcement
 The revision to ingredient specification and usage standard
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