Dangerous goods cannot be shipped at shipcloud's shipping rates, nor under your own carrier conditions*.
The only way currently possible would be that you create the "normal" labels via shipcloud - using your own carrier contracts - and then obtain a dangerous goods label from the carrier. To do this, however, you would have to contact the carrier directly and discuss the options for this procedure.
If we or a carrier learns that you have illegally shipped dangerous goods at our terms, a contractual penalty may apply and you will be asked to explain in writing why you have shipped dangerous goods and which ones.
* You can enter your own carrier contracts in shipcloud if you're at least registered for the Professional subscription.