2,2-Di(tert-butylperoxy)butane (CAS 2167-23-9)
2,2-Di(tert-butylperoxy)butane (CAS 2167-23-9) is an organic peroxide compound with molecular formula C12H26O4 and molecular weight 234.33. Also known as 2,2-BIS(TERT-BUTYLPEROXY)BUTANE, 2,2-DI(TERT-BUTYLPEROXY)BUTANE, DI-TERT-BUTYL SEC-BUTYLIDENE DIPEROXIDE. It typically appears in liquid form.
2,2-Di(tert-butylperoxy)butane (CAS number: 2167-23-9) is an industrial-grade chemical raw material that plays an irreplaceable crosslinking catalytic role in the fields of unsaturated polyester resins (UPR) and thermosetting plastics. It is especially common in the modification of foaming materials, EVA footwear, and various engineering plastics. 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 11 products from 7 verified manufacturers.
CAS 2167-23-9 is also known as:
- 2,2-BIS(TERT-BUTYLPEROXY)BUTANE
- 2,2-DI(TERT-BUTYLPEROXY)BUTANE
- DI-TERT-BUTYL SEC-BUTYLIDENE DIPEROXIDE
- 2,2-Di-(t-butylperoxy) butane
- 3,4,6,7-Tetraoxanonane, 5-ethyl-2,2,5,8,8-pentamethyl-
- Butane, 2,2-bis(tert-butyldioxy)-
- Butane, 2,2-bis(tert-butylperoxy)-
- Peroxide, (1-methylpropylidene)bis(tert-butyl
- Peroxide, (1-methylpropylidene)bis[(1,1-dimethylethyl)
- Peroxide, sec-butylidenebis(tert-butyl
- Peroxide,(1-methylpropylidene)bis[(1,1-dimethylethyl)
- 2,2-Di-(tert-butylperoxy)butane
CAS Number
2167-23-9
Molecular Formula
C12H26O4
Molecular Weight
234.33
EINECS Number
218-507-2
MDL Number
MFCD00081058
BRN Number
1769610
Chemical Name
2,2-Di(tert-butylperoxy)butane
Last Updated
7/30/2025
Aliases
Appearance
Colorless clear liquid
Appearance State
Liquid. Insoluble in water.
Color
Colorless
Odor
Acrid odor
Form
Liquid
Melting Point
≥ 80 (SADT)
Boiling Point
296.7 (predicted)
Flash Point
ca. 47.8
Density
0.88 @ 25 °C
Vapor Density
>1 (air=1)
Vapor Pressure
50 Pa @ 25°C
Refractive Index
1.445
LogP Value
3.2
Merck Index
Not Listed
Solubility
Immiscible
Water Solubility
immiscible with water
Solubility Detail
Immiscible with water, soluble in most organic solvents.
Storage Conditions
Store in refrigerator (ca. +4°C), away from ignition sources.
InChI Key
KMRKERIIMZDDPL-UHFFFAOYSA-N
GHS Hazard Symbols
Hazard Class
Signal Word
Danger
Hazard Symbols
O
Risk Codes
R7, R8, R10, R36/38, R37/38, R41
UN Number
UN 3103
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
Hazard Statements
H413,H242Precautionary Statements
P210, P220, P234, P280, P370+P378, P403+P235, P411, P420, P501Safety Statements
S16, S17, S26, S36/37/39, S45
7 verified suppliers offering 11 products for 2,2-Di(tert-butylperoxy)butane (CAS 2167-23-9). Compare equivalent grades across brands (e.g., Trigonox vs Luperox) by assay, physical form, and availability from trusted manufacturers and distributors worldwide.
| Company Name | Product Model | Assay | Physical Form | Status |
|---|---|---|---|---|
| NOF CORPORATION | PERHEXA 22 | 50% | Liquid | In Production |
| United Initiators GmbH | BU-50-WO | 50% | - | Imported |
| Pergan GmbH | PEROXAN PK234 V | 50% | Liquid | Imported |
| Pergan GmbH | PEROXAN PK234 W | 50% | Liquid | Imported |
| United Initiators GmbH | BU-50-AL | 50% | - | Imported |
| Lanzhou Auxiliary Agent Plant Co., Ltd. | LQ-DBPB | 50% | Liquid | In Production |
| GO YEN CHEMICAL INDUSTRIAL CO., LTD. | GYC DBPB | 50% | Liquid | In Production |
| Nouryon Chemicals International B.V. | Trigonox D-C50 | 50% | Liquid | Imported |
| Nouryon Chemicals International B.V. | Trigonox D-E50 | 50% | Liquid | Imported |
| AKPA Kimya | AKPEROX BU50 | 50% | Liquid | In Production |
| United Initiators GmbH | BU-35-AL | - | Imported |
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