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Since intentional use of mercury in industries is the most important driver for mining Hg mineral and illegal recycling of Hg contained waste,it is important to understand the importance and level of uncertainties of intentional use of mercury for a good management of Hg flow in the society.There has been much focus on the unintentional emission of mercury to the atmosphere.In order to eliminate mercury for our society which is a long term vision of the Minamata Convention,it is important to reduce and further stop using mercury in our daily consumables.This study aims to identify the knowledge gaps of current mercury flow in the Chinese society and guide the administration with mercury flow in a products whole lifecycle.This study will therefore focus on Hg fate in lifecycle of product(and intentional use in industrial processes,such as VCM production by carbide process).Substance flow analysis was used in the study with designated flow routes for different products.This study attempts to quantify the mercury releases in industries that intentionally use Hg,use a life-cycle approach.The material flow analysis for each industry estimates mercury releases by combining data on the amount of mercury in products produced or sold and estimating releases caused during production,distribution,use,and disposal of these products.Due to fact that most of the data used in the estimate are not accurate,they may come from different sources and may be just a range of possible distribution,uncertainties are introduced in the study.The main categories of Hg using industries in China are medical devices,fluorescent lamps,batteries,dental amalgam,electric devices and VCM production.It is estimated that the total annual demand for Hg in year 2010 is between 1200-2000 tons.The VCM is the single largest user of mercury while battery industry has the biggest uncertainty due to large difference in production processes and product quality.