On May 22, 2026, against the backdrop of the dual-carbon strategy and rapid development of the new energy vehicle industry, white carbon black has become a key material for high-performance tires due to its excellent properties, and its core performance is determined by the key indicator of specific surface area. Specific surface area refers to the total surface area per gram of material. The nano-scale particles of white carbon black give it a huge surface area, and the industry commonly uses three methods for accurate detection. The BET method measures the total surface area covering internal and external micropores; the CTAB method measures the effective external surface area accessible to rubber molecules; the alkali titration method reflects the activity of surface silanol groups, indicating chemical activity. The BET/CTAB ratio reflects microporosity, with a value close to 1 indicating good dispersibility; the BET/Sears ratio reflects hydroxyl distribution, and a high ratio represents excellent dispersion performance. This detection combination comprehensively analyzes the surface characteristics of white carbon black, providing a scientific basis for tire formula optimization and material upgrading, boosting the high-quality development of the green tire industry, and promoting both energy efficiency and safety improvement of new energy vehicles. For more information, please visit: https://www.tiktok.com/@mia_iota/video/7597717976720149782