What other records share CAS 127-43-5?

CAS 127-43-5 may appear across multiple EU annex records. The CAS lookup page shows all Annex II–VI entries sharing this identifier, useful for identifying cross-annex regulatory status of the same chemical substance.

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InventoryRef 4131602/03/2011

ALPHA-METHYL-BETA-IONONE

1-(2,6,6-Trimethyl-1-cyclohexenyl)pent-1-en-3-one; 5-(2,6,6-Trimethyl-1-cyclohexenyl)-4-penten-3-one; beta-Cetone; beta-Cyclocitrylidenebutanone; beta-Methylionone; Methyl-beta-ionone; beta-Iraldeine; homo-beta-ionone

ALPHA-METHYL-BETA-IONONE 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 127-43-5

CAS 127-43-5PubChem CID 5375218

Beta methyl ionone

1-(2,6,6-Trimethyl-1-cyclohexen-1-yl)-1-penten-3-one is a monoterpene. — ChEBI

IUPAC name: (E)-1-(2,6,6-trimethylcyclohexen-1-yl)pent-1-en-3-one

Molecular formula: C14H22O
Molecular weight: 206.32 g/mol
Exact mass: 206.167065321 Da
XLogP3: 3.4
Topological polar surface area: 17.1 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 1
Covalent units: 1
Defined stereocentres: 0

Also known as

beta-Methyliononebeta-Iraldeinebeta-Methyl iononeMethyl-beta-ionone.beta.-MethyliononeMethyl-.beta.-iononeCetone, beta-beta-Ionone, methyl-

16 more reported names

FEMA No. 27121-PENTEN-3-ONE, 1-(2,6,6-TRIMETHYL-1-CYCLOHEXEN-1-YL)-54PXU8D4R5(E)-1-(2,6,6-Trimethyl-1-cyclohexen-1-yl)pent-1-en-3-one5-(2,6,6-Trimethyl-1-cyclohexenyl)-4-penten-3-one.BETA.-CETONEEINECS 204-843-7EINECS 215-341-2EINECS 264-140-61322-71-0NSC 163995NSC-163995.BETA.-METHYL IONONEAI3-24259EC 264-140-63-Buten-2-one, 4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-, monomethyl deriv.

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:88921
EPA DTXSID:DTXSID401036355

Evidence from additional scientific databases

NIH PubChem PUG-View

Exact identifier match5375218

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

Boiling Point: 102.00 °C. @ 2.60 mm Hg Source: Human Metabolome Database (HMDB)
Boiling Point: 238-242 °C Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)

Density: 0.930-0.935 Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)

Physical Description: Liquid Source: EPA Chemical Data Reporting (CDR)
Physical Description: colourless to yellow liquid Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)

Refractive Index: 1.503-1.508 Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)

Solubility: (in ethanol) Source: Joint FAO/WHO Expert Committee on Food Additives (JECFA)

Signal: Warning Source: European Chemicals Agency (ECHA)
GHS Hazard Statements: H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]; H317 (100%): May cause an allergic skin reaction [Warning Sensitization, Skin]; 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: P261, P264, P272, P273, P280, P302+P352, P321, P332+P317, P333+P317, P362+P364, P391, 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 2 reports by companies from 1 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)
Signal: Warning Source: Hazardous Chemical Information System (HCIS), Safe Work Australia
GHS Hazard Statements: H315: Causes skin irritation [Warning Skin corrosion/irritation]; H317: May cause an allergic skin reaction [Warning Sensitization, Skin] Source: Hazardous Chemical Information System (HCIS), Safe Work Australia
Precautionary Statement Codes: P261, P264, P272, P280, P302+P352, P321, P332+P317, P333+P317, P362+P364, and P501 (click each P-code to see the statement) Source: Hazardous Chemical Information System (HCIS), Safe Work Australia

Consumer Uses: Fragrance Source: EPA Chemical Data Reporting (CDR)

Industry Uses: Fragrance Source: EPA Chemical Data Reporting (CDR)

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

Source	Result	Checked
NIH PubChem PUG-View	Exact match	2026-08-31

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 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Inventory details for ALPHA-METHYL-BETA-IONONE

INCI name

ALPHA-METHYL-BETA-IONONE

Description

Record provenance

Inventory reference: 41316
Imported identity: ALPHA-METHYL-BETA-IONONE
Source update: 02/03/2011

European Commission CosIng source notes

Annex records for ALPHA-METHYL-BETA-IONONE

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Key data

CAS

127-43-5

204-843-7

Restriction

—

Function

PERFUMING: Used for perfume and aromatic raw materials.

Official EU ingredient-name evidence

The ingredient name exactly matches the official 2025 EU glossary of common ingredient names.

#1478 · ALPHA-METHYL-BETA-IONONE

Ingredients with overlapping formulation functions

ALPHA-IONYL ACETATEPERFUMING

ALPHA-ISOMETHYL IONONEPERFUMING, SKIN CONDITIONING

ALPHA-METHYL-ALPHA-IONONEPERFUMING

ALPHA-METHYL-ALPHA-VINYL-BENZENEPROPANENITRILEPERFUMING

ALPHA-METHYLDECANENITRILEPERFUMING

ALPHA-PHELLANDRENEPERFUMING

ALPHA-PINANOLPERFUMING

ALPHA-SANTALOLPERFUMING

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 chemicals PubChem PUG REST EU Safety Gate cosmetic product alerts ECHA CHEM US EPA CompTox Cosmetic Ingredient Review safety assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal

How ALPHA-METHYL-BETA-IONONE appears in the CosIng inventory

The CosIng inventory lists ALPHA-METHYL-BETA-IONONE 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.

ALPHA-METHYL-BETA-IONONE 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

ALPHA-METHYL-BETA-IONONE 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, ALPHA-METHYL-BETA-IONONE carries the following function designation(s):

PERFUMING

CAS 127-43-5 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 ALPHA-METHYL-BETA-IONONE

This page reproduces the CosIng inventory entry for ALPHA-METHYL-BETA-IONONE 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 ALPHA-METHYL-BETA-IONONE 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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Tools & next steps

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Regulatory evidence by market

Chemical identity and properties

Beta methyl ionone

Evidence from additional scientific databases

NIH PubChem PUG-View

Boiling Point 2

Density 1

Physical Description 2

Refractive Index 1

Solubility 1

GHS Classification 7

Consumer Uses 1

Industry Uses 1