Phthalates are widely used in hundreds of products such as toys, food packaging materials, building materials, medical devices, cosmetics, clothing, and shoes. However, exceeding a certain amount of phthalates can interfere with human endocrine function, which is not conducive to children's growth and development. In recent years, the types of phthalate salt restrictions have been increasing, from early 3P (DEHP, DBP, BBP) to later 6P (DEHP, DBP, BBP, DIDP, DNOP, DINP), and some states in the United States have even proposed 8P (adding DMP and DHP on top of 6P). At present, the common method is 6P testing.

Standard and regulatory requirements: On December 14, 2005, the European Parliament and Council issued the Phthalate Directive (2005/84/EC), which was later replaced by 552/2009/EC and is now Annex 17 of the REACH regulation. The directive requires that the content of DEHP, DBP, and BBP in plastic materials in children's toys and care products be less than 1000ppm; The content of DINP, DIDP, and DNOP in imported plastic materials for children is less than 1000ppm. All products mentioned above shall not be placed on the market for sale if they do not meet the limit requirements. After 2005/84/EC, countries have established laws and regulations to control the use of phthalates in toys. In 2007, California, USA issued AB 1108 to regulate the use of ortho benzene 6P in toys. No one is allowed to produce or sell the following products: children's toys or child care products with DEHP, DBP, BBP concentrations exceeding 0.1%; Any children's toy or child care product that contains concentrations of DINP, DIDP, and DNOP exceeding 0.1% and can be put into the mouth for use by children under 3 years old. In 2008, the Consumer Product Safety Improvement Act (CPSIA) in the United States regulated the use of ortho benzene 6P in toys, which stipulated that providing the following products would be considered illegal within 180 days of the law's entry into force (February 10, 2009): any children's toy or child care product containing DEHP, DBP, BBP concentrations exceeding 0.1%; Any children's toy or care product containing DINP, DIDP, or DNOP concentrations exceeding 0.1% that can be put into the mouth.

In China, GB "Limit of Harmful Substances in Toy Coatings" requires that the total concentration of phthalate DEHP, DBP, and BBP in toy coatings should be less than 0.1%; The total concentration of DINP, DIDP, and DNOP shall not exceed 0.1%.