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InventoryRef 9847507/07/2020

DIISOBUTYLENE

Diisobutylene is the organic compound that conforms to the formula:

DIISOBUTYLENE is listed in the EU CosIng inventory, but no direct annex records are linked on this page yet.

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Regulatory evidence by market

No rule for this ingredient has been imported for any of the 13 markets tracked here.

That describes this inventory, not the law. No imported rule is not evidence that an ingredient is permitted: a rule may exist under another name or identifier, or in a dataset not yet imported here.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 107-39-1
CAS 107-39-1PubChem CID 7868

2,4,4-Trimethyl-1-pentene

2,4,4,-Trimethyl-1-pentene is a hydrocarbon and component of gasoline. — Toxin and Toxin Target Database (T3DB)

IUPAC name
2,4,4-trimethylpent-1-ene
Molecular formula
C8H16
Molecular weight
112.21 g/mol
Exact mass
112.125200510 Da
XLogP3
3.7
Topological polar surface area
0.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
0
Covalent units
1
Defined stereocentres
0

Also known as

Diisobutylene1-Pentene, 2,4,4-trimethyl-2,2,4-Trimethyl-4-pentene1-Methyl-1-neopentylethyleneNSC-87012,4,4-trimethylpentene-1N69L73ADVFNSC-73942
16 more reported names
alpha-DiisobutyleneRefChem:9086782,4,4,-trimethyl-1-pentene203-486-42,4,4-TRIMETHYLPENTENE2,4-Trimethyl-1-pentene2,4-Trimethyl-4-pentene1-Pentene,4,4-trimethyl-HSDB 1442EINECS 203-486-4NSC 73942UNII-N69L73ADVFBRN 1098309a-DiisobutyleneAI3-300491-Methyl-1-neopentylethylene; 2,2,4-Trimethyl-4-pentene; NSC 73942; NSC 8701
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Evidence from additional scientific databases

NIH PubChem PUG-View
Exact identifier match7868

Attributed physical-property, hazard, environmental and use annotations.

  • Signal: Danger Source: Regulation (EC) No 1272/2008 of the European Parliament and of the Council
  • GHS Hazard Statements: H225: Highly Flammable liquid and vapor [Danger Flammable liquids]; H411: Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard] Source: Regulation (EC) No 1272/2008 of the European Parliament and of the Council
  • Precautionary Statement Codes: P210, P233, P240, P241, P242, P243, P273, P280, P303+P361+P353, P370+P378, P391, P403+P235, and P501 (click each P-code to see the statement) Source: Regulation (EC) No 1272/2008 of the European Parliament and of the Council
  • GHS Hazard Statements: H225: Highly Flammable liquid and vapor [Danger Flammable liquids]; H304: May be fatal if swallowed and enters airways [Danger Aspiration hazard]; H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects] Source: Regulation (EC) No 1272/2008 of the European Parliament and of the Council
  • Precautionary Statement Codes: P210, P233, P240, P241, P242, P243, P261, P271, P280, P301+P316, P303+P361+P353, P304+P340, P319, P331, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement) Source: Regulation (EC) No 1272/2008 of the European Parliament and of the Council
  • Signal: Danger Source: European Chemicals Agency (ECHA)
  • GHS Hazard Statements: H225 (100%): Highly Flammable liquid and vapor [Danger Flammable liquids]; H304 (12.6%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]; H336 (12.6%): May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]; H400 (11.6%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]; H411 (100%): Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard] Source: European Chemicals Agency (ECHA)
  • Precautionary Statement Codes: P210, P233, P240, P241, P242, P243, P261, P271, P273, P280, P301+P316, P303+P361+P353, P304+P340, P319, P331, P370+P378, P391, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement) Source: European Chemicals Agency (ECHA)
  • ECHA C&L Notifications Summary: Aggregated GHS information provided per 795 reports by companies from 6 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
  • Note: This chemical does not meet GHS hazard criteria for 17.2% (66 of 384) of reports. Source: European Chemicals Agency (ECHA)
  • GHS Hazard Statements: H225 (82.8%): Highly Flammable liquid and vapor [Danger Flammable liquids]; H304 (79.2%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]; H336 (78.9%): May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]; H400 (74.2%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]; H410 (74.2%): Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard] Source: European Chemicals Agency (ECHA)
  • ECHA C&L Notifications Summary: Aggregated GHS information provided per 384 reports by companies from 16 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.; Reported as not meeting GHS hazard criteria per 66 of 384 reports by companies.; There are 15 notifications provided by 318 of 384 reports by companies with hazard statement code(s).; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
  • Health Effects: Petroleum distillates are aspiration hazards and may cause pulmonary damage, central nervous system depression, and cardiac effects such as cardiac arrhythmias. They may also affect the blood, immune system, liver, and kidney. (A600, L1297) Source: Toxin and Toxin Target Database (T3DB)
  • NFPA Health Rating: 2 - Materials that, under emergency conditions, can cause temporary incapacitation or residual injury. Source: Hazardous Substances Data Bank (HSDB)
  • NFPA Fire Rating: 3 - Liquids and solids that can be ignited under almost all ambient temperature conditions. Materials produce hazardous atmospheres with air under almost all ambient temperatures or, though unaffected by ambient temperatures, are readily ignited under almost all conditions. Source: Hazardous Substances Data Bank (HSDB)
  • NFPA Instability Rating: 0 - Materials that in themselves are normally stable, even under fire conditions. Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Bioconcentration: An estimated log BCF of 2.80 was calculated for 2,4,4-trimethyl-1-pentene(SRC), using an estimated log Kow of 4.55(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is high. Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 275(SRC), determined from a structure estimation method(2), indicates that 2,4,4-trimethyl-1-pentene is expected to have moderate mobility in soil(SRC). Volatilization of 2,4,4-trimethyl-1-pentene from moist soil surfaces is expected to be an important fate process(SRC) given an estimated Henry's Law constant of 0.75 atm-cu m/mole(SRC), using a fragment constant estimation method(3). The potential for volatilization of 2,4,4-trimethyl-1-pentene from dry soil surfaces may exist based upon a vapor pressure of 44.7 mm Hg(4). 2,2,4-Trimethyl-1-pentene is expected to biodegrade slowly in soil based upon no biodegradation in the Japanese MITI test(5). Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 275(SRC), determined from a structure estimation method(2), indicates that 2,4,4-trimethyl-1-pentene is not expected to adsorb to suspended solids and sediment in water(SRC). Volatilization from water surfaces is expected(3) based upon an estimated Henry's Law constant of 0.75 atm-cu m/mole(SRC), developed using a fragment constant estimation method(4). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 1.08 hr and 4.19 days, respectively(SRC). 2,2,4-Trimethyl-1-pentene is expected to biodegrade slowly in water based upon no biodegradation in the Japanese MITI test(7). According to a classification scheme(5), an estimated log BCF of 2.80(SRC), from a log Kow of 4.55(7) and a regression-derived equation(6), suggests the potential for bioconcentration in aquatic organisms is high. Source: Hazardous Substances Data Bank (HSDB)
  • Environmental Fate: ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), 2,4,4-trimethyl-1-pentene, which has a vapor pressure of 44.7 mm Hg at 25 °C(2), is expected to exist solely in a vapor-phase in the ambient atmosphere. Vapor-phase 2,4,4-trimethyl-1-pentene is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC); the half-life for this reaction in air is estimated to be 0.3 hr(SRC), calculated from its estimated rate constant of 53.19X10-12 cu cm/molecule-sec at 25 °C(SRC), determined using a structure estimation method(3). The rate constant for the vapor-phase reaction of 2,2,4-trimethyl-1-pentene with ozone has been estimated as 1.2X10-17 cu cm/molecule-sec at 25 °C(3). This corresponds to an atmospheric half-life of about 23 hrs at an atmospheric concentration of 7X10+11 ozone molecules per cu cm(3). Source: Hazardous Substances Data Bank (HSDB)

Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record

Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.

Additional source coverage and match status
SourceResultChecked
EMBL-EBI ChEBINo exact record2026-08-31
NIH PubChem PUG-ViewExact match2026-08-31

A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for DIISOBUTYLENE

INCI name

DIISOBUTYLENE

Description

Diisobutylene is the organic compound that conforms to the formula:

Record provenance

Inventory reference
98475
Imported identity
DIISOBUTYLENE
Source update
07/07/2020
European Commission CosIng source notes
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Key data

CAS
107-39-1
EC
—
Restriction
—
Function
NOT REPORTED
No function currently reported.

Ingredients with overlapping formulation functions

DELTAMETHRINNOT REPORTED
DIALLYLDIMETHYL AMMONIUM CHLORIDENOT REPORTED
DIETHYL CARBONATENOT REPORTED
DIETHYLENETRIAMINENOT REPORTED
DIISOPROPYL HEPTYL PHOSPHINE OXIDENOT REPORTED
DILINOLEYL ALCOHOLNOT REPORTED
DIMER ROSINNOT REPORTED
DIMETHICONE METHACRYLATENOT REPORTED

Additional official and scientific sources

11 external databases to check this identity in

Each link searches that source for this identity. What each source is, and its legal weight

ECHA CHEM / Information on chemicalsPubChem PUG RESTEU Safety Gate cosmetic product alertsECHA CHEMUS EPA CompToxCosmetic Ingredient Review safety assessmentsFDA Global Substance Registration SystemILO/WHO International Chemical Safety CardsJapan NITE-CHRIPNIOSH Pocket Guide to Chemical HazardsOECD eChemPortal

How DIISOBUTYLENE appears in the CosIng inventory

The CosIng inventory lists DIISOBUTYLENE as a cosmetic ingredient and this page links it to 0 annex records. The inventory entry captures names and identifiers, while the annex records show where the substance is prohibited, restricted or positively listed in EU cosmetics law.

DIISOBUTYLENE is also tagged with 1 cosmetic function in the official data. Function labels describe intended use, but they do not replace regulatory review of linked annex records before formulation or labelling work.

Frequently asked questions

DIISOBUTYLENE is listed in the EU CosIng ingredient inventory with no direct annex restriction records linked at this time. Absence of an annex link does not guarantee unrestricted use — always verify against the current official CosIng database before formulating.

According to the EU CosIng inventory, DIISOBUTYLENE carries the following function designation(s):

CAS 107-39-1 may appear across multiple EU annex records. Viewing the CAS lookup page shows all Annex II–VI entries sharing this identifier, which is useful for identifying cross-annex regulatory status of the same chemical substance.
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Source note for DIISOBUTYLENE

This page reproduces the CosIng inventory entry for DIISOBUTYLENE from public European Commission cosmetic ingredient materials and shows linked identifiers even when no direct annex match is currently attached.

Use this inventory page to research DIISOBUTYLENE and compare linked records, but verify restrictions and legal status against the current official source text and law before making regulatory decisions.

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