Biphenyl Market Size & Forecasts 2026-2035, By Segments (Purity Grade, Market Participants, Production Process, Packaging Type, End-Use Applications), Growth Opportunities, Innovation Landscape, Regulatory Shifts, Strategic Regional Insights (U.S., Japan, China, South Korea, UK, Germany, France), and Competitive Dynamics (Eastman Chemical, Emerald Performance Materials, Huntington Chemical, Solvay, Mitsui Chemicals)