Synthetic colorants mainly carotenoids. As β- apo -8- carrot aldehyde (C30H40O) or β- A - Park -8- carotenoid ester (C32H44O) and lemon yellow pigment (C33H44O), cantharidin, Gary red, yellow Gary, exposed Kangding. Environmental performance. With increasingly stringent environmental regulations and abroad colorants companies, many products on the toxicity of plastic colorants proposed stringent requirements colorant price, toxicity colorants more cause for concern. Today the United States, European Union and other countries have explicitly restrict the use of heavy metals, including cadmium, lead, selenium and other colorants; Germany and other countries have also introduced legislation to limit the use of some aromatic amine dyes and organic pigments. At present, there are a lot of toxic colorants in the production and use, to completely replace the technology still faces challenges and costs. Colorant Company | Weifang Fuyuan | colorants provided by Environmental Science and Technology Co., Ltd. Weifang Fuyuan. Weifang Fuyuan Environmental Protection Technology Co., Ltd. (www.wfdafuyuan.com) Shandong Weifang, the other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Weifang Fuyuan leadership with the staff warmly welcome all inquiries negotiations to create Weifang Fuyuan a better future.