Methylchloroisothiazolinone at a Glance
- Also referred to as MCI, or Kathon CG (when in an ingredient blend)
- Used as a preservative when combined with methylisothiazolinone
- Is a well-known skin sensitizer
- Can only be used in leave-on products at 7.5 ppm (parts per million) and rinse-off products at 15 ppm