Read
散 (third tone) when the meaning is the STATE of being loose, scattered, or unbound — i.e. when
散 acts as an adjective or noun, not a verb. Core list:
散文 (prose — 'loose, unbound writing' as opposed to verse),
散漫 (undisciplined),
懒散 (slack),
松散 (loose),
闲散 (leisurely),
零散 (fragmented),
散户 (retail investor),
散打 (sanda, Chinese kickboxing),
散光 (astigmatism),
散粉 (loose makeup powder),
散茶 (loose-leaf tea).