Malachite green is a synthetic green dye that was once widely used in manufacturing and textile printing. However, due to its toxicity, the use of malachite green has been banned in many countries.
Malachite green is a chelating agent that can bind to metals such as copper and iron. It is this property that made it effective for use as a dye and printing ink. However, it was later found that malachite green is also toxic to humans and animals. Short-term exposure to high levels of malachite green can cause nausea, vomiting and irritation of the skin and eyes. Long-term exposure can lead to liver damage and cancer.
Due to its toxicity, the use of malachite green has been banned or restricted in many countries, including the United States, Canada, Europe and Japan.