Regulations Governing the Safe Transport of Dangerous Goods by Air Article 3

Dangerous goods are divided into the following 9 classes:(1) Class 1: Explosives;(2) Class 2: Gases;(3) Class 3: Flammable liquids;(4) Class 4: Flammable solids, substances liable to cause spontaneous combustion, substances which, on contact with water, emit flammable gases;(5) Class 5: Oxidizing substances and organic peroxides;(6) Class 6: Toxic and infectious substances;(7) Class 7: Radioactive material;(8) Class 8: Corrosive substances;(9) Class 9: Miscellaneous dangerous substances and articles.The classification criteria for the dangerous goods described in the preceding paragraph shall follow the Technical Instructions.
中文原文 危險物品空運管理辦法第3條
危險物品之分類如下:
一、第一類:爆炸物品。
二、第二類:氣體。
三、第三類:易燃液體。
四、第四類:易燃固體、自燃物質、遇水釋放易燃氣體之物質。
五、第五類:氧化物、有機過氧化物。
六、第六類:毒性物質、傳染性物質。
七、第七類:放射性物質。
八、第八類:腐蝕性物質。
九、第九類:其他危險物品。
前項危險物品之分類基準,依技術規範之規定。

English translation for reference only; the Chinese text prevails. Not legal advice.