Can you carry methylene chloride without safety symbol on vehicle?

In the United States, methylene chloride is a regulated hazardous material for transportation purposes and vehicles transporting it in commerce must be marked, unless the shipment complies with one of the several exceptions that may apply. Also, carrying it as a consumer for personal use is not subject to these regulations. Each country has its own regulations on the transportation of regulated dangerous goods. Many apply to transportation for personal use, as well as for commercial use. Some offer other kinds of exceptions, such as for small quantities, etc. To know what is required and what is permitted, you need to consult with a specialist familiar with the regulations of your country and local government. You must describe the specifics of the shipment (quantity, how packaged, how carried, etc) before the need for a symbol on the vehicle can be determined.