Good Cosmetic Ingredient NOAEL Data

Tetrahydro-2-isobutyl-4-methyl-2H-pyran

Also known as: 2H-Pyran, tetrahydro-4-methyl-2-(2-methylpropyl)-, 2-Isobutyl-4-methyl-tetrahydro-pyran, Dihydrorose oxide, Pyran, tetrahydro-2-isobutyl-4-methyl-, Tetrahydro-4-methyl-2-(2-methylpropyl)-2H-pyran (+5 more)

INCI: TETRAHYDRO-2-ISOBUTYL-4-METHYL-2H-PYRAN (FRAGRANCE INGREDIENT)

Tetrahydro-2-isobutyl-4-methyl-2H-pyran (CAS 13477-62-8) is a cosmetic cosmetic ingredient functioning as Fragrance ingredient. NOAEL 500 mg/kg bw/day (cross-referenced against ToxValDB ECHA IUCLID); EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.

View industrial chemical safety profile for CAS 13477-62-8 →

Auto-generated CPSR Part A draft with source citations
Function
Fragrance ingredient
Safety Rating
GOOD

Chemistry & Identifiers

Formula
C10H20O
MW
156.26 g/mol
EC Number
236-770-1
PubChem CID
114530
IUPAC Name
4-methyl-2-(2-methylpropyl)oxane
InChIKey
LETLQGKRPMMKKC-UHFFFAOYSA-N

Regulatory Status

EU EU Status permitted
US US Status permitted
US Notes Permitted; RIFM safety assessment concluded safe as described

For full compliance data across multiple jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety, dermal absorption, and sensitization profile summaries for Tetrahydro-2-isobutyl-4-methyl-2H-pyran.

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

2 study endpoints found for Tetrahydro-2-isobutyl-4-methyl-2H-pyran. NOAEL (No Observed Adverse Effect Level) values are used to calculate the Margin of Safety per SCCS methodology.

Endpoint Value Route Species Study Type Source
NOAEL =500 mg/kg bw/day oral Rat subchronic ToxValDB_ECHA_IUCLID
NOAEL =1000 mg/kg bw/day oral Rat short-term ToxValDB_ECHA_IUCLID

Pre-Calculated Safety Assessment

Pre-calculated NOAEL → SED → MoS audit trail for Tetrahydro-2-isobutyl-4-methyl-2H-pyran across SCCS product categories, with measured dermal absorption where available.

ECHA REACH Registration

European Chemicals Agency REACH dossier and Substances of Very High Concern listing.

Registration Type
Full
Tonnage Band
1 - 10 tonnes
Substance Type
SUBSTANCE
SVHC Candidate
No

Function Categories & List Membership

Cosmetic/Chemical Function Categories
Fragrance
Regulatory List Membership (1)
IFRA Fragrance Transparency List

Expert Verdict

Expert safety assessment and concern-level summary for Tetrahydro-2-isobutyl-4-methyl-2H-pyran.

Regulatory Flags

potential-allergen fragrance-component ifra_fragrance

NOAEL Studies Summary

View details ->

Public NOAEL study rows linked to Tetrahydro-2-isobutyl-4-methyl-2H-pyran by CAS number or substance name.

Studies
2
Lowest NOAEL
500 mg/kg bw/day
Highest NOAEL
1000 mg/kg bw/day
ToxValDB_ECHA_IUCLID

Known Synonyms

2H-Pyran, tetrahydro-4-methyl-2-(2-methylpropyl)- 2-Isobutyl-4-methyl-tetrahydro-pyran Dihydrorose oxide Pyran, tetrahydro-2-isobutyl-4-methyl- Tetrahydro-4-methyl-2-(2-methylpropyl)-2H-pyran EC No.: 236-770-1 EINECS 236-770-1 2-(2′-Methylpropyl)-4-methyltetrahydropyran 236-770-1 Rose dihydrooxide

Chemical Function

Fragrance

Regulatory Lists

IFRA Transparency

Australian Status

AICIS status: listed

Frequently Asked Questions

Is Tetrahydro-2-isobutyl-4-methyl-2H-pyran safe in cosmetics?

Tetrahydro-2-isobutyl-4-methyl-2H-pyran has a safety rating of "GOOD" in our database. EU status: permitted. US status: permitted. 2 toxicological study endpoint(s) are available in our database.

Is Tetrahydro-2-isobutyl-4-methyl-2H-pyran allowed in the EU?

Tetrahydro-2-isobutyl-4-methyl-2H-pyran EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Tetrahydro-2-isobutyl-4-methyl-2H-pyran do in cosmetics?

Tetrahydro-2-isobutyl-4-methyl-2H-pyran functions as: Fragrance ingredient. It is classified as a cosmetic ingredient in our database. CAS number: 13477-62-8.

What is the NOAEL for Tetrahydro-2-isobutyl-4-methyl-2H-pyran?

The NOAEL (No Observed Adverse Effect Level) for Tetrahydro-2-isobutyl-4-methyl-2H-pyran is =500 mg/kg bw/day based on a subchronic study via oral route in Rat. A total of 2 study endpoints are available. Source: ToxValDB_ECHA_IUCLID.

Is Tetrahydro-2-isobutyl-4-methyl-2H-pyran used outside cosmetics?

Tetrahydro-2-isobutyl-4-methyl-2H-pyran also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.

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