Cas号7440-15-5分子式Re分子量186.21主含量Re＞99.99%99.999%杂质成份，%:<10ppm<10ppmFe≤0.0003≤0.00005Al≤0.0001≤0.00001Ba≤0.00007≤0.00001Mn≤0.0001≤0.00001Mg≤0.0001≤0.00001Ni≤0.0001≤0.00002Ti≤0.0001≤0.00002Be≤0.00005≤0.00001Co≤0.0001≤0.00002Zn≤0.00007≤0.00001Pb≤0.00007≤0.00001Ca≤0.0003≤0.00005Mo≤0.0004≤0.00005Cr≤0.00005≤0.00002W≤0.0005≤0.00005K≤0.0005≤0.00005Na≤0.0005≤0.00005Cu≤0.00001Sn≤0.00001Pt≤0.00001Cd≤0.00002Sb≤0.00001)