Human pituitary growth hormone, iodination grade, is a high-purity preparation used primarily in research and diagnostic applications for labeling with radioiodine to create tracers essential for radioimmunoassays (RIA). It enables the precise measurement of growth hormone levels in biological samples, aiding in the study of growth disorders and endocrine function. Additionally, it serves as a critical tool in the development and validation of immunoassays, ensuring accurate detection and quantification of growth hormone in clinical and laboratory settings. Its high purity and specific activity make it suitable for sensitive labeling and analytical techniques.