Found in: As a solvent in a number of cleaning products, including some furniture polishes and abrasive cleansers.
Health Risks: This corrosive ingredient can severely irritate and burn skin and eyes, and can even cause blindness if splashed in eyes. It can cause liver and kidney damage, and long-term exposure can result in bronchitis. It reacts with nitrites (added as a preservative in some products, or present as a contaminant) to form carcinogenic nitrosomines. Morpholine is a moderate to severe eye, skin and mucous membrane irritant.