Common Name(s): Pentaerythrityl tetraisononanoate,pentaerythrityl tetraisononanoate,pentaerythrityl ester,tetrafunctional polyol emollient

CAS Number: N/a

DESCRIPTION

What It Does: Provides light elegant dry emolliency from the branched 9-carbon chain with the pentaerythrityl backbone's quaternary carbon centre providing exceptional oxidative stability — the neopentyl architecture sterically protecting ester bonds from hydrolysis and oxidation.

Why It's Used: Pentaerythrityl tetraisononanoate is selected for the pentaerythrityl skeleton's oxidative stability combined with branched c9 isononanoic emolliency — the quaternary carbon centre prevents beta-hydrogen elimination, making pentaerythrityl esters among the most stable emollients in demanding formulation environments.

How It Works: Pentaerythrityl quaternary carbon: no beta-h → elimination impossible → ester bond stability; branched c9 isononanoic chains → light elegant dry emolliency from the branched 9-carbon chain; four ester positions → structured branched molecular architecture.

Typically Found In: Premium emollient,long-wear formulas,high-temperature stable

TECHNICAL DETAILS

Primary Category: Functional ingredient – emollient

Secondary Functions: Barrier sealing,softening

Application Areas:

Typical Concentration Range: 1%–30%

SOURCING & ETHICS

Vegan Status: Conditional - supplier confirmation required

Halal Status: Unverified - supplier confirmation required

Source Notes: Plant-derived, synthetic or animal-derived. verify source. [audit 2026-07-29 rev2: the record's own source_notes does not assert a non-animal origin, or instructs the reader to verify with the supplier; "yes" asserts knowledge the record does not hold. determination requires shariah-panel sign-off.]

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 1/5 – low; formulation-dependent

Sensitivity Concerns: Non-irritating.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Excellent safety profile. ewg score: 1.

Works Well With: Humectants,ceramides,actives as carrier

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

Pentaerythrityl esters are the standard for high-temperature-stable emollients — the quaternary carbon architecture provides oxidation resistance at processing temperatures where conventional esters degrade.

Last Verified: 2026-03-22

Primary Sources: Cosing database,pentaerythrityl tetraisononanoate pentaerythrityl ester emollient review