Product Description of tert‑Butyl Hydroperoxide CAS#75‑91‑2
Tert‑Butyl Hydroperoxide, alternatively referred to as tert‑butanol hydroperoxide, is an organic‑peroxide‑type compound with the molecular formula C₄H₁₀O₂. It occurs as a colorless clear liquid, sparingly soluble in water, and highly miscible with the majority of organic solvents such as ethanol and ether.
This substance finds broad utilization across numerous industrial scenarios. It can function as a catalyst, bleaching agent and deodorant. Furthermore, it acts as a cross‑linker for unsaturated polyester, a polymerization initiator, as well as a vulcanizing agent for rubber materials.

Tert-Butyl hydroperoxide Chemical Properties
Melting point | -2.8℃ |
Boiling point | 37 °C (15 mmHg) |
Density | 0.937 g/mL at 20 °C |
Vapor pressure | 62 mmHg at 45 °C |
Refractive index | n20/D 1.403 |
Flash point | 85 °F |
Storage conditions | 2-8℃ |
Acidity coefficient (pKa) | pK1: 12.80 (25°C) |
Form | Liquid |
Color | Transparent and colorless |
pH value | 4.3 |
Water solubility | Miscible |
Merck | 141,570 |
BRN | 1098280 |
Henry's Law Con stant | 4.2×10° mol/(m3Pa) at 25℃, Wang et al. (2017) |
Exposure limits | No exposure limit is set. On the basis of its irritant properties a ceiling limit of 1.2 mg/m3 (0.3 ppm) is recommended. |
Stability | Stable, but may explode if heated in enclosed conditions. Encounter with trace metals, molecular sieves or other contaminants may accelerate decomposition. Incompatible with reducing agents, combustible materials, acids |
InChI | 1S/C4H1002/c1-4(2,3)6-5/h5H,1-3H3 |
InChIKey | CIHOLLKRGTVIN-UHFFFAOYSA-N |
SMILES | CC(C)(C)OO |
LogP | 1.230 (est) |

Product Application of tert‑Butyl Hydroperoxide CAS#75‑91‑2
Tert‑Butyl Hydroperoxide is extensively employed as a polymerization initiator and cross‑linking agent for unsaturated resins. Additionally, it is adopted in emulsion polymerization, natural rubber vulcanization, diesel additive formulations, paint manufacturing, and other relevant industrial sectors.


