| Art No | Description | Grade | Packing |
| ** | Water Glass see: Sodium Silicate, Solution | ||
| ** | Wool Fat see: Lanolin | ||
| ** | Wool Red 40F see: Amaranth | ||
| WR0001 | Wright's Stain, Powder 染色劑 粉 | GR | 25g |
| WR0003 | Wright's Stain, Solution 染色劑 溶液 | EP | 500ml |
| WR0004 | Wright's Eosine Methyle Blue | EP | 25g |
| ** | XO see: Xylenol Orange | ||
| XA0002 | Xanthine 黄花色精 | EP | 5g |
| XA0001 | Xanthydrol 佔噸氫醇 | EP | 25g |
| XY0013 | Xylene 二甲苯 | GR | 500ml |
| XY0001 | Xylene 二甲苯 | EP | 500ml |
| XY0001D | Xylene 二甲苯 | EP | 2.5L |
| XY0001A | Xylene 二甲苯 | EP | 4L |
| XY0002 | m-Xylene 偏二甲苯 | EP | 500ml |
| XY0003 | o-Xylene 鄰二甲苯 | EP | 500ml |
| XY0004 | p-Xylene 對二甲苯 | EP | 500ml |
| ** | Xylene Brilliant Cyanine G see: Brilliant Blue G | ||
| XY0005A | Xylene Cyanol FF | GR | 25g |
| ** | 2,3-Xylenol see: 2.3-Dimethylphenol | ||
| XY0008A | Xylenol Orange 二甲酚橙 | GR | 5g |
| XY0008B | Xylenol Orange Solution 二甲酚橙 溶液 | CP | 500ml |
| ** | Xylenyl Phthalein-bis-iminodiacetic Acid see: Phthalein Purple | ||
| ** | Xylidine Ponceau 2R see: Ponceau 2R | ||
| XY0010 | Xylitol 木糖醇 | EP | 25g |
| XY0011 | D-(+)-Xylose 古旋性木糖 | GR | 25g |
| ** | 2',4'-Xylylazo-2-naphthol see: Sudan II |
