IMO Classes for Dangerous Goods
![Class 6.1](/images/references/imo/6.1IH-I.gif)
Toxic, poison substances
Known to be toxic to humans so as to afford a hazard to health during transportation or is presumed to be toxic to humans because it falls within a toxic category when tested on laboratory animals.
An irritating material such as tear gas that causes extreme irritation, especially in confined spaces.