这种化学物质主要有什么用途？
主要用作漂白剂、防腐剂。[{'character': '主', 'pinyin': 'zhu3', 'highest pitch': 8.84, 'lowest pitch': 7.69, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '要', 'pinyin': 'iao4', 'highest pitch': 11.29, 'lowest pitch': 8.84, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '用', 'pinyin': 'iong4', 'highest pitch': 10.55, 'lowest pitch': 8.52, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '作', 'pinyin': 'zuo4', 'highest pitch': 9.06, 'lowest pitch': 7.23, 'duration': 0.23, 'prosody hierarchy': '#2'}, {'character': '漂', 'pinyin': 'piao3', 'highest pitch': 8.25, 'lowest pitch': 5.07, 'duration': 0.29, 'prosody hierarchy': 'null'}, {'character': '白', 'pinyin': 'bai2', 'highest pitch': 7.16, 'lowest pitch': 5.41, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '剂', 'pinyin': 'ji4', 'highest pitch': 11.04, 'lowest pitch': 7.16, 'duration': 0.29, 'prosody hierarchy': '#2'}, {'character': '防', 'pinyin': 'fang2', 'highest pitch': 10.87, 'lowest pitch': 6.84, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '腐', 'pinyin': 'fu3', 'highest pitch': 10.87, 'lowest pitch': 4.22, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '剂', 'pinyin': 'ji4', 'highest pitch': 11.04, 'lowest pitch': 7.34, 'duration': 0.31, 'prosody hierarchy': '#4'}]