Heptasulfur imide is the inorganic compound with the formula S7NH.

It is a pale yellow solid that is, like elemental sulfur, highly soluble in carbon disulfide.

The compound, which is only of academic interest, is representative of a family of sulfur imides (or azacyclosulfanes or thiacycloazanes) Sx(NH)y.

It is prepared by reaction of disulfur dichloride with ammonia,[2] although other methods have been developed.

The S−NH−S center is almost planar,[4] suggesting that the amine is nonbasic.