Answer :
The type of labels your employer is affixing to the spray bottles after transferring cleaning chemicals from a 5-gallon container is known as **C. Secondary labels**.
Here's why:
1. **Manufacturer's Label**: This label is provided by the company that produces the cleaning chemicals and is usually already on the 5-gallon container. It contains important information such as product name, instructions, warnings, and ingredients.
2. **Shipping Labels**: These labels are used for shipping purposes to identify the contents, address, and other shipping-related information. They are not typically affixed to individual spray bottles in this scenario.
3. **DOT Labels and Placards**: These are used for hazardous materials transportation to comply with Department of Transportation regulations. They are not relevant to labeling spray bottles in the workplace.
4. **Secondary Labels**: In this context, secondary labels are additional labels that are put on containers or bottles after the original manufacturer's label. They may contain workplace-specific information such as dilution ratios, usage instructions, or internal tracking codes.
By affixing secondary labels to the spray bottles, your employer ensures that employees have the necessary information for safe and appropriate use of the cleaning chemicals.