... > chemical entity > molecular entity > main group molecular entity > p-block molecular entity > pnictogen molecular entity > nitrogen molecular entity > ammonium compound > ammonium salt > inorganic ammonium salt > ammonium persulfate

... > chemical entity > molecular entity > inorganic molecular entity > inorganic salt > inorganic ammonium salt > ammonium persulfate

... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > salt > inorganic salt > inorganic ammonium salt > ammonium persulfate