Sanitation Standards for Disposable Chopsticks Article 4
The sulphur dioxide residue of the disposable chopsticks shall not exceed 500 ppm.
中文原文 免洗筷衛生標準第4條
免洗筷中二氧化硫殘留量應為五○○ppm以下。
English translation for reference only; the Chinese text prevails. Not legal advice.