Methyl ethyl ketone peroxide
CAS 1338-23-4C8H18O6210.22 g/mol
IUPAC: 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane
PubChem
Physical & Chemical Properties
| Boiling Point | 244 °F at 760 mmHg (Decomposes) (NIOSH, 2024) |
| Density | 1.17 at 68 °F (USCG, 1999) - Denser than water; will sink |
| Solubility | 1 to 5 mg/mL at 72 °F (NTP, 1992) |
| Flash Point | 180 °F (NTP, 1992) |
| Vapor Pressure | less than 0.01 mmHg at 68 °F Component 2 (83.33%: LACTOSE) (NTP, 1992) |
| Appearance | Methyl ethyl ketone peroxide is a colorless liquid. Strong irritant to skin and tissue. Used as an initiator for room temperature cure of unsaturated polyester resins. |
Data: PubChem · Last updated: 4/20/2026
GHS Classification
No GHS classification data available.
Classification data is sourced from ECHA.
Regulatory Compliance
TSCA
Listed
note: Status based on EPA TSCA Active Inventory · inventory name: TSCA Chemical Substance Inventory
View sourceGlobal Trade Intelligence
No trade flow data available for this chemical.
HS Code(s): 2909
Data: UN Comtrade
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