草脱净（亚脱净）是一种三嗪类除草剂，在多国广泛使用。属于持久性有机污染物，因污染问题已经被欧盟禁止使用。中国大陆地区使用“莠去津”作为产品名称。

无色粉末。中性及弱酸碱介质中较安定、强酸碱中水解。

Atrazine is an herbicide of the triazine class. Atrazine is used to prevent pre- and postemergence broadleaf weeds in crops such as maize (corn) and sugarcane and on turf, such as golf courses and residential lawns. It is one of the most widely used herbicides in US and Australian agriculture. It was banned in the European Union in 2004, when the EU found groundwater levels exceeding the limits set by regulators, and Syngenta could neither show that this could be prevented nor that these levels were safe.