Official EU label nameGlossary entry 21240

PIPERONYL BUTOXIDE

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

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Resolved identifiers

Resolved substance identity

CAS:51-03-6

EC:200-076-7

Ingredient index records:

PIPERONYL BUTOXIDE

Cosmetic functions: SKIN PROTECTING

1,3-Benzodioxole, 5-[[2-(2-butoxyethoxy)ethoxy]methyl]-6-propyl-

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1 matched or reported name

PIPERONYL BUTOXIDE

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name PIPERONYL BUTOXIDE.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 51-03-6

CAS 51-03-6PubChem CID 5794

Piperonyl Butoxide

Piperonyl butoxide is a pale yellow to light brown liquid with a mild odor and a faint bitter taste. (NTP, 1992) — CAMEO Chemicals

IUPAC name: 5-[2-(2-butoxyethoxy)ethoxymethyl]-6-propyl-1,3-benzodioxole

Molecular formula: C19H30O5
Molecular weight: 338.4 g/mol
Exact mass: 338.20932405 Da
XLogP3: 3.7
Topological polar surface area: 46.2 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 5
Covalent units: 1
Defined stereocentres: 0

Also known as

ButacideButocideButoxidePyrenone 606Butyl carbitol 6-propylpiperonyl etherButoxide (synergist)6-Propylpiperonyl butyl diethylene glycol etherButoxide, Piperonyl

16 more reported names

NCI-C02813FMC 5273NIA 5273Piperonyl butoxydeENT 14,2502-(2-Butoxyethoxy)ethyl 6-propylpiperonyl etherNSC-8401Piperonyl butoxide, technical1,3-Benzodioxole, 5-((2-(2-butoxyethoxy)ethoxy)methyl)-6-propyl-LWK91TU9AH3,4-Methylenedioxy-6-propylbenzyl n-butyl diethyleneglycol etherPiperonyl butoxide technical6-(Propylpiperonyl)-butyl carbityl etherButyl-carbityl (6-propylpiperonyl) ether1,3-Benzodioxole, 5-[[2-(2-butoxyethoxy)ethoxy]methyl]-6-propyl-alpha-(2-(2-n-Butoxyethoxy)-ethoxy)-4,5-methylenedioxy-2-propyltoluene

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External database identifiers

ChEBI:CHEBI:32687
ChEMBL:CHEMBL1201131
EPA DTXSID:DTXSID1021166
PubMed:39255949
PubMed:36941454
PubMed:32767777
PubMed:32320717
PubMed:31642701
PubMed:30763314
PubMed:30572783
PubMed:30203046
PubMed:29183579
PubMed:29064635
PubMed:28903497
PubMed:28899750

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

Additional authoritative substance research

Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight

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 US EPA CompTox CTX APIs

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Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

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