According to 'GB/T 26033-2010 Ammonium Metatungstate', the appearance quality standard for ammonium metatungstate is that the product appears as a white powder or light yellow crystals, with no visible foreign matter or lumps upon visual inspection.

According to 'GB/T 26033-2010 Ammonium Metatungstate', the pH standard for ammonium metatungstate is that, at room temperature, the pH value measured with a solution containing 650g/L of tungsten trioxide does not exceed 4.5.

According to 'GB/T 26033-2010 Ammonium Metatungstate', the standard for water-insoluble substances in ammonium metatungstate is that, at room temperature, the water-insoluble substances measured with a solution containing 650g/L of tungsten trioxide do not exceed 0.05%.

The predicted average price by the Ganzhou Tungsten Association and the long-term contract quotations of major tungsten enterprises from February 2024 to February 2025.

According to China Tungsten Online, the rare earth price trend in China in February 2025 exhibited a fluctuating upward movement.

According to China Tungsten Online, the tungsten market in China exhibited an overall downward trend in February 2025, primarily attributed to the implementation of export control policies on tungsten-related items, price reductions in long-term contracts by major tungsten enterprises, and persistently weak downstream demand.

According to China Tungsten Online, the molybdenum price trend in China remained relatively stable in February 2025. In terms of average price:

The Lanthanum Tungsten Electrode (WL20) is a high-performance tungsten alloy electrode, primarily composed of tungsten and a small amount of lanthanum. 

The tungsten plate is made from high-purity tungsten material, offering excellent high-temperature resistance and corrosion resistance. 

According to China Tungsten Online, data from the United States Geological Survey show that by the end of 2024, global rare earth reserves were about 90 million tons, a year-on-year decrease of about 18.18%; among them, China's rare earth reserves were the highest, at 44 million tons, accounting for 48.89% of the world's total reserves.