Final answer:
An ODP cardholder must provide name, address, and the quantity of refrigerant purchased for record-keeping and regulatory compliance.
Step-by-step explanation:
The information an ODP cardholder must provide to the seller when purchasing refrigerants includes the name, address, and the quantity of the product purchased. This requirement exists to maintain proper records and track the sale and distribution of refrigerants, which are regulated due to their environmental impact, particularly in regards to ozone depletion and global warming potential. Regulation of these substances is implemented under various environmental protection laws and guidelines.