[CAS Number 50-23-7] Cortisol, also known as hydrocortisone when used as a medication, is a steroid hormone belonging to the glucocorticoid class produced by the adrenal gland. High levels of this hormone in the blood cause a condition called Cushing syndrome, and low levels can cause Addison disease. Cortisol is available as reference material (bulk powder and/or solution) and as calibrated, Ready-to-Use, certified reference material (CRM). This product is designed for qualitative and quantitative protocols and can be used for forensic, toxicology, research, and other chemical/biochemical analytical applications. Special storage & shipping requirements.