O.P.I Nail Varnish.

We want to assure you that OPI is committed to the safety of our consumers and of Beauty Professionals, and emphasize that we have always taken the necessary steps to ensure that our products exceed safety standards. In light of these most recent concerns, however, and even though our products have always been safe, we have taken the unprecedented step of reformulating our Nail Lacquers, Nail Treatments, and Nail Hardeners to remove some of the ingredients that have been the topic of recent discussion, while maintaining the high product quality standards we and you expect:
Since 2006, OPI has reformulated its entire line of Nail Lacquers, Nail Treatments, and Nail Hardeners to eliminate DBP (dibutyl phthalate) and Toluene.

Formaldehyde has never been an ingredient in OPI Nail Lacquers or Nail Treatments.

Some OPI Nail Hardeners do contain formaldehyde, while others are formulated without it to give consumers a choice. The levels of formaldehyde are more than four times lower than the safe levels established by the U.S. Food and Drug Administration. In fact, according to a study conducted under the auspices of the California authorities, the levels of formaldehyde, even in nail salons, are no higher than those found in many common work places, such as offices, where no nail products whatsoever are present. OPI continues to search for effective alternates to formaldehyde.