# McKesson OPA/28 OPA Concentration Indicator

The McKesson OPA/28 OPA Concentration Indicator is designed to ensure the efficacy of the McKesson OPA/28 Solution by verifying its minimum effective concentration (MEC) before each use. The precision of this test is vital for maintaining high levels of disinfectant performance in critical environments.

## Product Features
*   3-second dip time followed by a 90-second reading duration.
*   Features a large and easy-to-read indicator pad for user convenience.
*   Comes with a definitive color identification comparison chart on each bottle for accurate results.

### Product Shelf Life
Unopened bottles have an 18-month shelf life, while bottles are effective for up to 6 months once opened.