DBEEA can be photolyzed directly in the environment
The gas phase reaction rate constant of DBEEA with photochemical hydroxyl radical was estimated to be 7.4X10-11 cu cm/molecular second at 25 ℃ using the structure estimation method (1). This is equivalent to that when the atmospheric concentration per cubic centimeter (1) is 5X10+5 hydroxyl radicals, the atmospheric half-life is about 5 hours. The second order hydrolysis rate constant was estimated to be 0.27 L/mol sec using the structure estimation method (2); At pH 7 and 8, the half-life is 294 and 29 days, respectively (2). DBEEA can also be photolyzed directly in the environment because the compound contains a functional group that can absorb light greater than 290 nm (3).
The BCF of DBEEA was estimated to be 62, the estimated logkow was 3.24 and the regression equation (2) was derived. According to the classification scheme (3), the BCF shows that the biological concentration potential in aquatic organisms is medium.
The Koc of DBEEA was estimated to be 1400, and the estimated log Kow was 3.24 (1, SRC) using regression derived equation (2). According to classification scheme (3), the estimated Koc value indicates that the mobility of DBEEA in soil is low.
Using the fragment constant estimation method (1), the Henry’s law constant of DBEEA was estimated to be 3.1 x10 – 13 atm cu/mol. This Henry’s Law constant indicates that DBEEA is basically nonvolatile on water (2). The estimated Henry’s law constant of DBEEA shows that volatilization from a moist soil surface is impossible. Based on the estimated vapor pressure of 9.8X10-8 mm Hg at 25 ° C (3), volatilization from the dry soil surface is not expected to be an important environmental fate process.
NIOSH (NOES Survey 1981-1983) estimated that 1476 workers (75 of whom are women) in the United States may be exposed to DBEEA. In workplaces where DBEEA is produced or used, occupational exposure to DBEEA can occur through inhalation and skin contact.
Compatible with natural rubber and synthetic rubber. So as to improve the low-temperature flexibility of rubber. Especially, it has good cold resistance and gasoline resistance. It is mainly used for rubber, polyurethane, plastic, artificial leather, cable and other materials.
Adhesives and sealant chemicals
Plastic and rubber products not involved elsewhere
From November 2018 to November 2019, China’s total export volume of DBEEA to the Netherlands was 1503682KG, with a total export volume of USD 11135095. The largest proportion of exports in recent 12 months was 14.77% in 2019.06.
From November 2018 to November 2019, China’s total export volume of DBEEA was 68537067 kg, with a total export value of 494280167 US dollars. The largest proportion of exports in recent 12 months was 10.89% in 2019.06.
From November 2018 to November 2019, China has exported DBEEA to 95 countries. The order of import volume from high to low is: the United States, Brazil, India, Russia, Argentina, Colombia, Indonesia, Australia, the Netherlands, Guatemala. China’s exports to the United States are the highest, accounting for 9.38% of China’s total exports.
