Common Name(s): Ppg-51,ppg-51,cosmetic functional ingredient,established active

CAS Number: N/a

DESCRIPTION

What It Does: Provides co-solvent, humectant, or emulsification function from the polypropylene glycol backbone's ether oxygen groups with moderate lipophilicity.

Why It's Used: Ppg-51 is selected for its ppg-51 propylene glycol chain — the 51-repeat methyl-substituted ether backbone provides high-mw lipophilic film former with w/o emulsification and water-repellent character, distinguishing it from both unsubstituted peg (fully hydrophilic) and organic glycols (no lipophilic tail).

How It Works: Ppg methyl group raises logp versus peg (ether oxygens provide hydrophilicity, methyl provides lipophilicity) — tunable from humectant to emulsifier with increasing mw.

Typically Found In: Cosmetic formulations

TECHNICAL DETAILS

Primary Category: Active ingredient – cosmetic active

Secondary Functions: Skin conditioning

Application Areas:

Typical Concentration Range: 0.1%–10%

SOURCING & ETHICS

Vegan Status: Conditional

Halal Status: Yes

Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Well-tolerated by most skin types.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.

Works Well With: Standard skincare actives

Avoid Combining With: No known significant incompatibilities

SCIENTIFIC NOTE

Safety documented in cosing at standard formulation concentrations.

Last Verified: Cosing database,ppg-51 technical review

Primary Sources: 2026-03-22