Testosterone—frequently designated as test—is a naturally occurring steroid hormone primarily produced by the male testes and female ovaries, with supplementary secretion from the adrenal cortex. Functioning as the principal androgenic and anabolic steroid, it governs fundamental physiological processes across both sexes.

Additionally, it aids in controlling the menstrual cycle and plays an essential role in driving the maturation of female secondary sexual characteristics. Owning to its profound impact on cellular pathways, estradiol modulates diverse systemic mechanisms, spanning bone mineral maintenance to cardiovascular performance.

| Melting point | 178-179 °C(lit.) |
| alpha | D25 +76 to +83° (dioxane) |
| Boiling point | 355.44°C (rough estimate) |
| density | 1.0708 (rough estimate) |
| refractive index | 80.4 ° (C=1, Dioxane) |
| Fp | 2℃ |
| storage temp. | room temp |
| solubility | Practically insoluble in water, soluble in acetone, sparingly soluble in ethanol (96 per cent), slightly soluble in methylene chloride. |
| pka | pKa 10.71±0.02(H2O(0.1% p-dioxane) t=25±0.1 I=0.03(KCl))(Approximate) |
| form | powder |
| color | White to off-white |
| biological source | synthetic (organic) |
| Water Solubility | Soluble in dimethyl sulfoxide, ethanol , water, phosphate buffer saline, dimethyl formamide, acetone, dioxane and alkali hydroxides. Slightly soluble in vegetable oils. |
| Merck | 143703 |
| BRN | 1914275 |
| BCS Class | 1 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| InChIKey | VOXZDWNPVJITMN-ZBRFXRBCSA-N |
| CAS DataBase Reference | 50-28-2(CAS DataBase Reference) |
| NIST Chemistry Reference | Estra-1,3,5(10)-triene-3,17beta-diol(50-28-2) |
| EPA Substance Registry System | Estradiol (50-28-2) |
Safety Information
| Hazard Codes | T,Xn,F |
| Risk Statements | 60-61-45-63-64-40-36-20/21/22-11-48 |
| Safety Statements | 53-22-36/37/39-45-36/37-26-16-36-20 |
| RIDADR | 2811 |
| WGK Germany | 3 |
| RTECS | KG2975000 |
| F | 45879 |
| HazardClass | 6.1 |
| PackingGroup | III |
| HS Code | 29372390 |
| Hazardous Substances Data | 50-28-2(Hazardous Substances Data) |
| Toxicity | LD50 subcutaneous in rat: > 300mg/kg |
