Mu Xin may refer to:

• Fu Hao ({{floruit}} {{circa}} 1200 BC), posthumously known as Mu Xin, a wife of King Wu Ding of the Shang dynasty
• Mu Xin (artist) (1927–2011), Chinese painter, calligrapher and writer

• Nisoniades astur
• Nisoniades dasahara
• Nisoniades flavipalpis
• Nisoniades hemula
• Nisoniades norica
• Nisoniades oeta
• Nisoniades pato
• Nisoniades phyllophila
• Nisonin
• N-isopropyl-(123I)-4-iodoamphetamine
• N-Isopropyl-(123I)-4-iodoamphetamine
• N-isopropyl-(123I)-para-iodoamphetamine
• N-Isopropyl-(123I)-para-iodoamphetamine
• N-Isopropyl-(123I)-p-iodoamphetamine
• N-isopropyl-(123I)-p-iodoamphetamine
• N-isopropyl-4-iodoamphetamine
• N-Isopropyl-4-iodoamphetamine
• N-Isopropyl-para-iodoamphetamine
• N-isopropyl-para-iodoamphetamine
• N-isopropyl-p-iodoamphetamine
• N-Isopropyl-p-iodoamphetamine
• Nisor
• Nisos Lemnos
• Nisos mykonos
• Nisotin