A good chemical label not only carries the general and vital information about the product but also abide by the rules as instigated by the Government and the UN.
Apart from this information and rule side, there exists a marketing side also where you need to attract the customers to buy your product. Suppose you go to some supermarket to buy a cleaning solution, how would you analyze a product, or more accurately, how would you convince yourself that the product you are buying is good and up to the mark? Obviously, by reading the label on it. The label will tell you what brand you are picking and many other details. Most of the time you will pick that product that has good outer packing with awesome graphics and paper quality of the label. This makes you feel that the product belongs to some good brand. A good label attracts the customers to buy the product.
So the three aspects that should be considered while designing them are:
You might get surprised, but there are separate companies that work to manufacture these chemical labels only. They make catchy and informative labels that carry the information, follow the rules and marketing strategy to sell the product as well. They work to offer the manufacturers with the best chemical label possible.