Experts 'poison' : whether the toxic to see content

Recently, Johnson & Johnson baby products is pointed out that there are quality problem, for this reason, the company issued a statement, Johnson & Johnson baby products, including preservatives, the ingredients are safe, and is the product sale approval.
j&j's this statement immediately caused the vigilance of the market. Associate professor, professor of south China university of technology institute of chemical technology, said can't simply said to contain a substance is the 'toxic', content is very important, 'there is no poison is a cumulative process', he pointed out that the quaternary ammonium salt - 15 allows you to use in our country, the key is to see how much dosage. Two 4-dioxane also allows the raw material into nature.