Substance profile
α,α-dimethylbenzyl hydroperoxide
α,α-dimethylbenzyl hydroperoxide is a colorless to pale-yellow liq.
01 · Identification
What α,α-dimethylbenzyl hydroperoxi… is
α,α-dimethylbenzyl hydroperoxide is a colorless to pale-yellow liq. Its molecular formula is C9H12O2 and its molecular weight is 152.19 g/mol. It boils at 153 °C, melts at -9 °C.
Under the GHS it carries the signal word Danger. It is classed as flammable agents - 2nd degree.
Other names for α,α-dimethylbenzyl hydroperoxi…
- cumene hydroperoxide
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H242 | Heating may cause a fire. |
| H331 | Toxic if inhaled. |
| H312 | Harmful in contact with skin. |
| H302 | Harmful if swallowed. |
| H373 | May cause damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H314 | Causes severe skin burns and eye damage. |
| H411 | Toxic to aquatic life with long lasting effects. |
Precautionary statements: P260, P270, P271, P273, P280, P301, P302, P304, P310, P312, P314, P330, P331, P352, P391, P501
03 · Physical and chemical properties
α,α-dimethylbenzyl hydroperoxi… properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 153 °C (307.4 °F) | HSDB | |
| 153 °C (307.4 °F) | at 760 mmHg | DOE PAC | |
| 127.22 °C (261 °F) | decomposes | CAMEO | |
| Melting point | -9 °C (15.8 °F) | ICSC | |
| -40 °C (-40 °F) | below this value | CAMEO | |
| Density | 1.06 g/cm³ | ICSC | |
| 1.03 g/cm³ | at 20 °C | HSDB | |
| 1.03 g/cm³ | at 25 °C | CAMEO | |
| Solubility | Slightly soluble in water | HSDB | |
| Readily soluble in alcohol, acetone, esters, hydrocarbons, and chlorinated hydrocarbons. | HSDB | ||
| In water, 1.39X10+4 mg/L at 25 °C | at 25 °C | HSDB | |
| Vapor pressure | 0.6 mmHg | at 20 °C, for 80-85% by weight | CAMEO |
| 0.24 mmHg | at 20 °C | ICSC | |
| 0.0033 mmHg | at 25 °C | HSDB | |
| Flash point | 79.44 °C (175 °F) | HSDB | |
| 57.22 °C (135 °F) | CAMEO | ||
| 79 °C (174.2 °F) | ICSC | ||
| Autoignition temperature | 148.89 °C (300 °F) | HSDB | |
| Lower explosive limit (LEL) | 0.9 % by volume | HSDB | |
| Upper explosive limit (UEL) | 6.5 % by volume | HSDB | |
| Vapor density | 5 (air = 1) | CAMEO | |
| 5.4 (air = 1) | ICSC | ||
| Critical temperature and pressure | 331.85 °C (629.3 °F) | HSDB | |
| Corrosivity | Reactive with metal-containing materials. | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling α,α-dimethylbenzyl hydroperoxi…
Incompatible materials
A mixture of dimeric and trimeric dibromo compounds with the hydroperoxide in benzene may react vigorously or explode if the solution is heated to concentrate it.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
CUMENE HYDROPEROXIDE is a strong oxidizing agent. May react explosively upon contact with reducing reagents. Violent reaction occurs upon contact with copper, copper alloys, lead alloys, and mineral acids. Contact with charcoal powder gives a strong exothermic reaction. Decomposes explosively with sodium iodide [Chem. Eng. News, 1990, 68(6), 2]. Can be exploded by shock or heat [Sax, 2 ed., 1965, p. 643]. May ignite organic materials.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check α,α-dimethylbenzyl… in the storage compatibility matrix →