noun
freshness-preserving agent
Technical term for a substance added to food or other perishable goods to maintain freshness; commonly seen on food packaging labels.
このパックには鮮度保持剤が入っています。
This pack contains a freshness-preserving agent.
鮮度保持剤のおかげで野菜が長持ちする。
Thanks to the freshness-preserving agent, the vegetables last longer.
Compound of 鮮度 (freshness) + 保持 (preservation) + 剤 (agent).