[{"from": "human", "value": "Please give me some details about this molecule. [51Cr]"}, {"from": "gpt", "value": "The molecule is an isotope of chromium that has been used as a radioactive label for decades. It is used as a diagnostic radiopharmaceutical agent in nephrology to determine glomerular filtration rate, and in hematology to determine red blood cell volume or mass, study the red blood cell survival time and evaluate blood loss."}]