4-氟苯甲酰甲醛水合物为醛类衍生物，可用作医药合成中间体；若吸入，应将患者移到新鲜空气处；若皮肤接触，应脱去污染的衣着，用肥皂水和清水彻底冲洗皮肤，如有不适感，就医。
医药
路线1：以4-氟苯乙酮为原料合成4-氟代苯甲酰甲醛
- 步骤：将二氧化硒（6.70 g，61.0 mmol）加入到含有4-氟苯乙酮（8.43 g，61.0 mmol）的二恶烷（100 mL）和水（3 mL）的混合溶液中；将混合物在55℃加热至二氧化硒完全溶解，随后回流5-6小时；TLC监测反应完成后，过滤混合物，滤液真空浓缩得粘性油状物；向油状物中加入水（50 mL），搅拌12小时，收集固体，用水洗涤并真空干燥，得到4-氟苯基乙二醛（6.60 g）。
- 条件：55℃加热至二氧化硒溶解，随后回流5-6小时；溶剂为二恶烷和水（体积比约33:1）。
- 收率：85%。
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