tert-Butyl hydroperoxide
Also known as: TBHP, 1,1-Dimethylethyl hydroperoxide, 1,1-dimethylethyl-hydroperoxide, 2-hydroperoxy-2-methylpropane, Butyl hydroperoxide, tert-Butylhydroperoxide, trigonoxa-75(czech), trigonoxa-w70, T-HYDRO(R), USP -800, MFCD00002130, EINECS 200-915-7
tert-Butyl hydroperoxide (CAS 75-91-2) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C4H10O2 and a molecular weight of 90.121 g/mol. Key properties include a melting point of -2.8 °C, a boiling point of 120.4±9.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 35.0±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H242 and H302 — Harmful if swallowed. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 75-91-2
- Jingsj CID
- J-38259-2
- Molecular Formula
- C4H10O2
- Molecular Weight
- 90.121 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -2.8 °C |
|---|---|
| Boiling Point | 120.4±9.0 °C at 760 mmHg |
| Density | 0.9±0.1 g/cm3 |
| Flash Point | 35.0±0.0 °C |
| Exact Mass | 90.068077 |
| PSA | 29.46000 |
| LogP | 1.38 |
| Vapor Pressure | 7.4±0.5 mmHg at 25°C |
| Refractive Index | 1.399 |
| Additional Property | Miscible |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H242
- H302 — Harmful if swallowed
- H304
- H311 — Toxic in contact with skin
- H331 — Toxic if inhaled
- H314 — Causes severe skin burns and eye damage
- H317 — May cause an allergic skin reaction
- H336 — May cause drowsiness or dizziness
- H341 — Suspected of causing genetic defects
- H410 — Very toxic to aquatic life with long lasting effects
Frequently Asked Questions
What is the CAS number of tert-Butyl hydroperoxide?
The CAS number of tert-Butyl hydroperoxide is 75-91-2.
What are the molecular formula and molecular weight of tert-Butyl hydroperoxide?
tert-Butyl hydroperoxide has molecular formula C4H10O2 and molecular weight 90.121 g/mol.
Is tert-Butyl hydroperoxide hazardous?
tert-Butyl hydroperoxide has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H242; H302 — Harmful if swallowed.
What are the upstream and downstream products of tert-Butyl hydroperoxide?
For tert-Butyl hydroperoxide, Upstream Products: Isobutane Residual Solvent Standard, 1,1-Dichloroethane, Cholecalciferol; Downstream Products: tert-Butyl peroxyisobutyrate, Benzaldehyde, Isobutyric acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "tert-Butyl hydroperoxide (CAS 75-91-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-38259-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.