Nonoxynol

**Definition:** Nonionic surfactant mixtures varying in the number of repeating ethoxy (oxy-1,2-ethanediyl) groups. They are used as detergents, emulsifiers, wetting agents, defoaming agents, etc. Nonoxynol-9, the compound with 9 repeating ethoxy groups, is a spermatocide, formulated primarily as a component of vaginal foams and creams.

**Tree numbers:** - D02.033.455.250.700.620 - D05.750.741.575 - D25.720.741.575 - J01.637.051.720.741.575

**Synonyms:** - Nonoxynols - Nonylphenoxypolyethoxyethanol - Nonylphenoxypolyethoxyethanols - Nonoxinols - Nonoxinol