化工行业：溴素、六氟丙烯、双季戊四醇价格明显上行，建议关注后续变化

Investment Rating - The industry investment rating is "Positive" as the industry index is expected to outperform the benchmark [12] Core Insights - Bromine prices have significantly increased due to supply shortages caused by import disruptions, with a current price of 29,000 CNY/ton, reflecting a 20.83% increase week-on-week and a 34.88% increase year-to-date [1][2] - The price of hexafluoropropylene has risen to 39,000 CNY/ton, up 9.83% week-on-week and 11.43% year-to-date, primarily driven by rising costs of R22 [1][6] - The price of dipentene has reached 68,600 CNY/ton, with an 8.89% increase week-on-week and a 42.92% increase year-to-date, supported by strong demand and supply concerns [1][5] Bromine Market Summary - China's bromine production capacity is stable at 102,000 tons, but production is declining from 70,000 tons to 58,000 tons due to resource limitations and environmental upgrades [2] - The import volume of bromine has increased from 63,000 tons to 77,000 tons, leading to an import dependency rate rising from 47% to 57% [2] - Geopolitical tensions have disrupted bromine imports, particularly from Israel, which accounted for 51% of total imports in early 2023 [2][3] Dipentene Market Summary - Dipentene is primarily produced as a byproduct of isoprene, with current production limited to 3%-5% of isoprene output [5] - Demand for dipentene has remained strong, with stable purchasing behavior observed in March 2023, leading to a sustained upward price trend [5] - Hubei Yihua, a major producer, is upgrading its production facilities, which is expected to increase its capacity to 70,000 tons by the end of 2025 [5] Hexafluoropropylene Market Summary - The price increase of hexafluoropropylene is attributed to rising costs of R22 and tight supply of fluorochemical raw materials [6] - The demand for downstream products such as fluororubber and fluororesin remains weak, indicating a cautious market outlook [6]