tert-Butyl hydroperoxide (CAS 75-91-2)
tert-Butyl hydroperoxide (CAS 75-91-2) is an organic peroxide compound with molecular formula C4H10O2 and molecular weight 90.12. Also known as Butylhydroperoxid, TBHP, T-BUTYL HYDROPEROXIDE. It typically appears in liquid form.
tert-Butyl hydroperoxide (CAS number: 75-91-2) is an high-purity chemical raw material that ensures a uniform molecular weight distribution of the final polymer while providing an excellent free radical generation rate. It is widely applied in PVC production, styrene polymerization, and modified plastic formulations. Its exceptional chemical characteristics give it an important position in modern industrial formulations, providing enterprises with highly efficient product solutions.
Below you can find its complete physical and chemical properties, safety data, GHS hazard classifications, and a catalog of 19 products from 15 verified manufacturers.
CAS 75-91-2 is also known as:
- Butylhydroperoxid
- TBHP
- T-BUTYL HYDROPEROXIDE
- tert-Butanol peroxide
- TERT-BUTYL HYDROPEROXIDE
- T-HYDRO(R)
- 1,1-Dimethylethyl hydroperoxide
- 1,1-dimethylethyl-hydroperoxid
- 1,1-dimethylethylhydroperoxide
- 1,1-dimethylethyl-Hydroperoxide
- 2-Hydroperoxy-2-methylpropane
- 2-Methyl-prop-2-yl-hydroperoxide
- Aztec t-butyl Hydroperoxide-70, Aq
- Butyl hydroperoxide
- butylhydroperoxide
CAS Number
75-91-2
Molecular Formula
C4H10O2
Molecular Weight
90.12
EINECS Number
200-915-7
MDL Number
MFCD00002130
BRN Number
1209229
Chemical Name
tert-Butyl hydroperoxide
Last Updated
7/30/2025
Aliases
Appearance
Colorless liquid with a strong, pungent odor
Appearance State
Liquid. Soluble in water, miscible with ethanol, acetone, benzene.
Color
Colorless
Odor
Strong, pungent odor
Form
Liquid
Melting Point
-2.8
Boiling Point
38 at 17 mmHg
Flash Point
46.1
Density
0.937 @ 20 °C
Vapor Density
3.1 (air=1)
Vapor Pressure
62 mmHg @ 45°C
Refractive Index
1.403 (20°C D)
LogP Value
1.23 (predicted)
Merck Index
1553
Solubility
Slightly soluble in water, readily soluble in most organic solvents like alcohols, ethers, and sodium hydroxide solution.
Water Solubility
miscible with water
Solubility Detail
Solubility in water is 12 g/L, readily soluble in most organic solvents like alcohols, ethers.
Storage Conditions
Store at 2-8°C.
InChI Key
CIHOLLKRGTVIJN-UHFFFAOYSA-N
GHS Hazard Symbols
Hazard Class
Signal Word
Danger
Hazard Symbols
O
Risk Codes
R7, R10, R20/21/22, R34, R43, R52/53, R65
UN Number
UN 3109
IARC Classification
Not Classified
WGK Germany
3
RTECS Number
EQ4900000
Auto-ignition Temperature
88-93 (self-accel. dec.)
TSCA Listed
Listed (Active)
Packing Group
II
Customs Code
29094990
Occupational Exposure Band (OEB)
Not Specified
Occupational Exposure Limit (OEL)
ACGIH C: 0.1 ppm (Skin)
Immediately Dangerous to Life or Health (IDLH)
40 ppm
Hazard Statements
H311,H330,H371,H372,H373,H226,H242,H302,H311+H331,H314,H317,H341,H411,H304,H336,H410,H300,H310,H318Safety Statements
S3/7, S14, S16, S17, S24, S26, S36/37/39, S45, S61, S62
15 verified suppliers offering 19 products for tert-Butyl hydroperoxide (CAS 75-91-2). Compare equivalent grades across brands (e.g., Trigonox vs Luperox) by assay, physical form, and availability from trusted manufacturers and distributors worldwide.
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