酸性橙7是化学物质，分子式是C16H11N2NaO4S。英文别名:C.I. 15510; C.I. Acid Orange 7; C.I. Acid Orange 7， monosodium salt; D & C Orange no. 4; Orange II sodium salt; 4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt; Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate; Orange Ⅱ; Acid Orange II Lake; Pigment Orange 17 (15510:1); sodium 4-[(2E)-2-(2-oxonaphthalen-1(2H)-ylidene)hydrazino]benzenesulfonate; sodium 4-[(E)-(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate