Cas号7440-52-0分子式Er分子量167.26别名铒，铒粉外观AppearanceGreypowderICPMajorAnalysisConfirmsErbiumComponent痕量稀土金属TraceRareEarthAnalysis≤2000.0ppm纯度Purity(BasedOnRareEarthAnalysis)≥99.9%)