Used primarily as an antioxidant in polymers and elastomers, especially in rubber products like tires and hoses, to prevent degradation caused by heat, oxygen, and ozone. It protects against aging and cracking, maintaining material flexibility and strength over time. Also employed in lubricants and greases to extend service life by inhibiting oxidation and reducing sludge formation. Its effectiveness in high-temperature environments makes it suitable for industrial and automotive applications where long-term stability is critical.