EU Trademark Classification EU01 Chemicals Copper sulphate Class 01 Copper sulphate 2492 硫酸铜（矾） Chinese 硫酸铜（矾） English Copper sulphate [vitriol] Site ref. 2492 Class 01 Included in Harmonised Database (HDB), TM5 ID List, WIPO Madrid Goods and Services (MGS) Name qualifier vitriol