tert-Butyl cumyl peroxide

CAS Number

3457-61-2

Molecular Formula

C13H20O2

Molecular Weight

208.3

EINECS Number

222-386-8

MDL Number

MFCD00072691

BRN Number

1770284

Last Updated

7/8/2025

Appearance

Colorless to pale yellow liquid

Appearance State

Liquid. Insoluble in water, soluble in most organic solvents.

Color

Colorless to Light Yellow

Odor

Slight pungent odor

Form

Liquid

Melting Point

5-8

Boiling Point

287.5 (predicted)

Flash Point

ca. 110

Density

0.94

Vapor Density

ca. 4.5 (air=1)

Vapor Pressure

14 Pa @ 40°C

Refractive Index

1.419-1.423

LogP Value

4.4 @ 25 °C

Merck Index

Not Listed

Solubility

10.66 mg/L at 20°C

Water Solubility

10.66 mg/L @ 20°C

Solubility Detail

Solubility in water is 10.66 mg/L (20°C).

Storage Conditions

Store indoors, away from heat and ignition sources.

InChI Key

VNHGZROWRBVLKZ-UHFFFAOYSA-N

Signal Word

Warning

Hazard Symbols

O

Risk Codes

R7, R38, R51/53

UN Number

UN 3105

IARC Classification

Not Classified

WGK Germany

2

RTECS Number

-

Auto-ignition Temperature

ca. 230

TSCA Listed

Listed (Active)

Packing Group

II

Customs Code

29096000

Occupational Exposure Band (OEB)

Not Specified

Occupational Exposure Limit (OEL)

Not Specified

Immediately Dangerous to Life or Health (IDLH)

Not Specified