According to my current knowledge base (as of September 2021), the standards for tungsten trioxide in the Chinese National Standard (GB/T) are as follows:
GB/T 21183-2007 “Tungsten Trioxide (WO3) Industrial Purification Process Specification”: This standard specifies the process requirements and test methods for industrial purification of tungsten trioxide, including raw material selection, production process, purification method, etc.
GB/T 21184-2007 “Chemical Analysis Methods of Tungsten Trioxide (WO3)”: This standard specifies the methods for chemical analysis of tungsten trioxide, including chemical composition analysis, impurity analysis, etc. These standards mainly relate to the relevant requirements of tungsten trioxide in industrial production and chemical analysis. If you have more specific requirements for the specific application of tungsten trioxide or other standards, please contact CTIA GROUP LTD, and I will try my best to provide you with more detailed prices and various information.
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