Substance profile
Bis(α,α-dimethylbenzyl) peroxide
Bis(α,α-dimethylbenzyl) peroxide is crystals from ethanol.
01 · Identification
What Bis(α,α-dimethylbenzyl)… is
Bis(α,α-dimethylbenzyl) peroxide is crystals from ethanol. Its molecular formula is C18H22O2 and its molecular weight is 270.4 g/mol. It boils at 130 °C, melts at 40 °C.
Under the GHS it carries the signal word Danger.
02 · Identifiers
Bis(α,α-dimethylbenzyl)… identifiers and molecular data
Bis(α,α-dimethylbenzyl)… CAS number and EC number
Bis(α,α-dimethylbenzyl)… molecular formula and molecular weight
03 · GHS classification
Bis(α,α-dimethylbenzyl)… hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Bis(α,α-dimethylbenzyl)… pictograms and signal word
Bis(α,α-dimethylbenzyl)… hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Organic peroxides or Self-reactive substances and mixtures | Category Type C and D or Type E and F | H242 | GHS02 |
| Skin corrosion/irritation GHS chapter 3.2 | Category 2 | H315 | GHS07 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 2A | H319 | GHS07 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 2 | H411 | GHS09 |
Where two values are shown with “or”, the hazard statement is shared by more than one category or by more than one class, and the code alone does not say which. H272, for example, belongs to oxidising liquids and to oxidising solids — the physical state decides. The binding answer for a specific entry is in the CLP Annex VI table itself.
Bis(α,α-dimethylbenzyl)… hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H242 | Heating may cause a fire. |
| H360D | May damage the unborn child. |
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
| H411 | Toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to Bis(α,α-dimethylbenzyl)…. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Bis(α,α-dimethylbenzyl)…
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Bis(α,α-dimethylbenzyl… issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Bis(α,α-dimethylbenzyl)… precautionary statements
CLP Annex VI assigns 12 precautionary statements to Bis(α,α-dimethylbenzyl)…. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Disposal
What has to happen to the contents and the empty container.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Bis(α,α-dimethylbenzyl)… name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | бис(α,α-диметилбензил)пероксид |
| Spanish español | Peróxido de bis(α,α-dimetilbencilo) |
| Czech čeština | bis(α,α-dimethylbenzyl)peroxid |
| Danish dansk | bis(α,α-dimethylbenzyl) peroxid |
| German Deutsch | Bis(α,α-dimethylbenzyl)peroxid |
| Estonian eesti | Bis(α,α-dimetüülbensüül)peroksiid |
| Greek ελληνικά | δις(α,α-διμεθυλοβενζυλο)υπεροξείδιο |
| English English | bis(α,α-dimethylbenzyl) peroxide |
| French français | peroxyde de bis(α,α-diméthylbenzyle) |
| Croatian hrvatski | bis(α,α-dimetilbenzil)-peroksid |
| Italian italiano | perossido di bis(α,α-dimetilbenzile) |
| Latvian latviešu | bis(α,α-dimetilbenzil)peroksīds |
| Lithuanian lietuvių | bis(α,-dimetilbenzil)peroksidas |
| Hungarian magyar | bisz(α,α-dimetilbenzil)-peroxid |
| Maltese Malti | perossidu bis(α,α-dimetilbenżil) |
| Dutch Nederlands | bis(α,α-dimethylbenzyl)peroxide |
| Polish polski | nadtlenek bis(α,α-dimetylobenzylu) |
| Portuguese português | peróxido de bis(α,α-dimetilbenzilo) |
| Romanian română | peroxid de bis(α,α-dimetilbenzil) |
| Slovak slovenčina | bis (1-fenyl-1-metyletyl)peroxid |
| Slovenian slovenščina | bis(α,α-dimetilbenzil) peroksid |
| Finnish suomi | bis(α,α-dimetyylibentsyyli)peroksidi |
| Swedish svenska | bis(.alfa.,.alfa.-dimetylbensyl)peroxid dikumylperoxid |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Bis(α,α-dimethylbenzyl)… GHS label elements
Everything CLP Annex VI fixes for Bis(α,α-dimethylbenzyl)…, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Bis(α,α-dimethylbenzyl)…
- Heating may cause a fire.
- May damage the unborn child.
- Causes skin irritation.
- Causes serious eye irritation.
- Toxic to aquatic life with long lasting effects.
- Wash … thoroughly after handling.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF ON SKIN:
- IF IN EYES:
- Get medical advice/attention.
- If skin irritation occurs:
- If eye irritation persists:
- Remove contact lenses, if present and easy to do. Continue rinsing.
- Wash with plenty of water/…
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Bis(α,α-dimethylbenzyl)… in the GHS label constructor →
07 · Health hazards
Bis(α,α-dimethylbenzyl)… health hazards and exposure limits
Bis(α,α-dimethylbenzyl)… hazard summary
Causes somnolence in lethal-dose feeding studies of rats; Causes methemoglobinemia in subcutaneous injections of cats and rats; [RTECS] A strong oxidizer; May ignite on contact with organic substances; [Hawley] A skin, eye, and respiratory tract irritant; [ICSC] A skin, eye, and mucous membrane irritant; Increased methemoglobinemia in rats after 4 month feeding studies; [HSDB] A strong oxidizing agent; Explosive; [CAMEO] An irritant; [MSDSonline]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Bis(α,α-dimethylbenzyl)… 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.
Bis(α,α-dimethylbenzyl)… boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 130 °C (266 °F) | decomposes, at 760 mmHg | CAMEO |
| 100 °C (212 °F) | at 0.2 mmHg (reduced pressure) | HSDB |
Bis(α,α-dimethylbenzyl)… melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 40 °C (104 °F) | HSDB | |
| 39 °C (102.2 °F) | ICSC |
Bis(α,α-dimethylbenzyl)… density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.02 g/cm³ | HSDB | |
| 1 g/cm³ | ICSC |
Bis(α,α-dimethylbenzyl)… solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Solubility in water: none | ICSC | |
| less than 1 mg/mL at 73 °F (NTP, 1992) | at 22.78 °C | CAMEO | |
| In water, 0.4 mg/L at 25 °C | at 25 °C | HSDB |
Bis(α,α-dimethylbenzyl)… flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 71.11 °C (160 °F) | HSDB | |
| 71 °C (159.8 °F) | ICSC |
Bis(α,α-dimethylbenzyl)… lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Severe explosion hazard when shocked, exposed to heat, or by spontaneous chemical reaction. | Organic peroxides | HSDB |
Bis(α,α-dimethylbenzyl)… vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 9.3 (air = 1) | CAMEO |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Bis(α,α-dimethylbenzyl)… fire and explosion behaviour
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Bis(α,α-dimethylbenzyl)… fire potential
... May ignite organic materials on contact.
Source: Hazardous Substances Data Bank (HSDB)
Fire and explosion
Seven organic peroxides were tested for propagation and power of explosion, and for shock sensitivity. Tert-butylperoxybenzoate and dibenzoylperoxide showed high shock sensitivity and explosive powers of 40 and 25% of TNT respectively. Di-tert-butylperoxide showed medium sensitivity and a power of 30% TNT. Cumyl hydroperoxide (80% in cumene), dibenzoylperoxide (75% in water), dicumyl peroxide and dilauroyl peroxide did not propagate explosion.
Source: HSDB
10 · Handling and storage
Bis(α,α-dimethylbenzyl)… storage and handling
Bis(α,α-dimethylbenzyl)… safe storage
Fireproof. Separated from combustible substances, reducing agents, strong oxidants, strong acids, bases and heavy metals. Cooled. Keep in the dark. Well closed. Keep under inert gas.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Bis(α,α-dimethylbenzyl)… storage conditions
Store in original container. Keep container tightly closed in a dry and well-ventilated place. Recommended storage temperature 2-8 °C.
Source: Hazardous Substances Data Bank (HSDB)
Bis(α,α-dimethylbenzyl)… incompatible materials
Reacts violently with acids, bases, reducing agents, and heavy metals.
Source: Hazardous Substances Data Bank (HSDB)
Bis(α,α-dimethylbenzyl)… reactivity
The explosive instability of the lower dialkyl peroxides (e.g., dimethyl peroxide) and 1,1-bis-peroxides decreases rapidly with increasing chain length and degree of branching, the di-tert-alkyl derivatives being amongst the most stable class of peroxides. Though many 1,1-bis-peroxides have been reported, few have been purified because of the higher explosion hazards compared with the monofunctional peroxides. It is unlikely that this derivative would be particularly unstable compared to other peroxides in its class [Bretherick 2nd ed., p 44 1979].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Bis(α,α-dimethylbenzyl)… in the storage compatibility matrix →
11 · Questions
Bis(α,α-dimethylbenzyl)… — frequently asked questions
What is the CAS number of Bis(α,α-dimethylbenzyl)…?
The CAS number of Bis(α,α-dimethylbenzyl)… is 80-43-3. Its EC number is 201-279-3.
What is the chemical formula of Bis(α,α-dimethylbenzyl)…?
The molecular formula of Bis(α,α-dimethylbenzyl)… is C18H22O2 and its molecular weight is 270.4 g/mol.
What does a Bis(α,α-dimethylbenzyl)… label have to show?
Under CLP Annex VI the label for Bis(α,α-dimethylbenzyl)… carries the pictograms Flame, Health hazard, Exclamation mark and Environment and the signal word is Danger.
Is Bis(α,α-dimethylbenzyl)… flammable?
Yes. CLP Annex VI assigns Bis(α,α-dimethylbenzyl)… H242 — heating may cause a fire. The flash point reported for it is 71.11 °C (160 °F) (HSDB).
Is Bis(α,α-dimethylbenzyl)… a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Bis(α,α-dimethylbenzyl)…. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
What is the boiling point of Bis(α,α-dimethylbenzyl)…?
The boiling point reported for Bis(α,α-dimethylbenzyl)… is 130 °C (266 °F), decomposes, at 760 mmHg (CAMEO).
What is the melting point of Bis(α,α-dimethylbenzyl)…?
The melting point reported for Bis(α,α-dimethylbenzyl)… is 40 °C (104 °F) (HSDB).
How should Bis(α,α-dimethylbenzyl)… be stored?
Store in original container. Keep container tightly closed in a dry and well-ventilated place. Recommended storage temperature 2-8 °C. (Hazardous Substances Data Bank (HSDB))
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