According to the commodity analysis system of Business Society: On February 5th, the average market price of isooctanol in Shandong was 7,633.33 yuan per ton, down 1.08% from the previous trading day. Upstream propylene prices were weak and consolidating, reducing cost support for isooctanol. Downstream plasticizer prices fluctuated and declined, leading to decreased purchasing enthusiasm. Isooctanol equipment operated at high capacity, ensuring ample supply, which weakened upward momentum and increased downward pressure. PriceSeek analysis of isooctanol: Bull-Bear Score: -1.5. Scoring rationale: The article indicates that the spot price of isooctanol fell by 1.08% compared to the previous trading day, primarily due to weak and consolidating upstream propylene prices weakening cost support, fluctuating and declining downstream plasticizer prices reducing purchasing enthusiasm, and high equipment capacity leading to ample supply. Overall, bearish factors are significant, with weakened support for spot price increases and intensified downward pressure. It is expected that prices will continue to face pressure in the short term, but the decline has not reached extreme levels, hence a score of -1.5 (between general bearish and significant bearish).