PEG-100 STEARATE
What is PEG-100 STEARATE (CAS 9004-99-3) in cosmetics and what are its global regulatory limits?
PEG-100 STEARATE (CAS No. 9004-99-3) is a verified cosmetic ingredient primarily functioning as Cleansing in topical formulations. Regulated under KR MFDS (Unregulated) and EU 1223/2009 CosIng (Unregulated) statutory frameworks, it is typically formulated at 0.1–5.0% within an optimal stability window of pH 4.5–7.5.
7-Track Official Regulatory Label Names Matrix
Primary Statutory Gazette Only · Zero Machine Translation| Jurisdiction Track | Official Statutory Label Name | One-Click Copy |
|---|---|---|
| 1. Korea (MFDS Standard Name) | PEG-100 STEARATE (KR MFDS Registered) | |
| 2. Korea Former Nomenclature History | — | — |
| 3. European Union (EU CosIng Glossary) | PEG-100 STEARATE | |
| 4. United States (US PCPC / MoCRA INCI) | PEG-100 STEARATE | |
| 5. US FDA OTC Monograph Active Name | — (Cosmetic Inactive / Non-OTC) | — |
| 6. China (NMPA IECIC Standard Name) | PEG-100 硬脂酸酯 | |
| 7. Japan (JCIA Standard / MHLW Quasi-Drug) | PEG-100 STEARATE (Standard INCI Reference) |
Layer 1 — Statutory Regulatory Limits Across 6 Regions
| Region | Status | Max Limit | Conditions & Statutory Source |
|---|---|---|---|
| Korea (MFDS) | Unregulated | GMP | Listed in official cosmetic inventory |
| Europe (EU) | Unregulated | GMP | Listed in official cosmetic inventory |
| United States (FDA) | Unregulated | GMP | Listed in official cosmetic inventory |
| China (NMPA) | Listed / Allowed | GMP | IECIC Entry #494 |
| Japan (MHLW) | Unregulated | GMP | Listed in official cosmetic inventory |
| ASEAN (ACD) | Unregulated | GMP | Listed in official cosmetic inventory |
Layer 2 — Toxicological & Historical Safe Use Concentrations (CIR / SCCS / CN IECIC / IFRA)
“EU SCCS Safe Opinion Limit” is the toxicological safe threshold (MoS≥100), whereas “US CIR Reported Max Use” and “CN IECIC Historical Max Use” represent historical maximum concentrations in commercial products.
| Assessment Basis | Application Scope | Concentration Range | Verdict & Dossier Reference |
|---|---|---|---|
| CN IECIC Historical Max Use | leave_on | ≤ 10% | Safe (MoS≥100)NMPA IECIC (2025) Entry 00548 (2025) |
| CN IECIC Historical Max Use | rinse_off | ≤ 6% | Safe (MoS≥100)NMPA IECIC (2025) Entry 00548 (2025) |
Stratum Corneum Penetration Depth & Bio-Spicule Transdermal Delivery
Under passive topical application, molecules diffuse tortuously through intercellular lipids. Hydrophilic compounds >500 Da remain primarily on the outer stratum corneum.
pH Stability Window (0–14), Thermal Limit & HLB Colloidal Phase Behavior
Outside pH 4.5–7.5, risk of hydrolysis, viscosity loss, or ionic dissociation increases.
Thermally stable up to 70°C during standard emulsification.
Cellular & Molecular Target Mechanism Flow
Academic & Toxicological Synthesis
Tier 2 SynthesisSynthesized strictly from peer-reviewed PubMed abstracts and official toxicological dossiers linked to this ingredient.
Linked Peer-Reviewed Literature (NIH PubMed) (1)
Development and characterization of topical formulation for maintenance therapy containing sorbitan monostearate with and without PEG-100-stearate [PMID: 39282719 · 2025]
Basic therapy is an integral part of the treatment of chronic skin diseases. However, the formulation of skin products should be analysed with respect to the physical stability and tolerance by the patients before applying them to diseased skin. In particular, the suitability of the formulation for use on damaged skin should be taken into consideration so that no exacerbation of the condition is caused. The following approach investigated two formulations with the emulsifier sorbitan monostearate and one with the addition of polyethylene glycol 100 stearyl ether. The characterization included rheology, macroscopic and microscopic cream analysis compared to marketed products for basic therapy. Pyranine staining of stratum corneum (SC) and trans-epidermal water loss (TEWL) measurements were performed with ex vivo porcine SC to asses skin barrier function. The rheological characterization showed a gel-like, viscoelastic behaviour of the formulations and a viscosity in the same order of magnitude as the marketed products. Staining with pyranine revealed that skin damage caused by sodium lauryl sulfate was compensated by treatment with the developed formulations. Following the same trend, TEWL results clearly showed decreasing values, which evidence improved skin barrier function. In conclusion, the developed sorbitan monostearate formulations can potentially improve deficient skin barrier function as a part of basic therapy of skin diseases and act as a superior alternative to market products comprising a minimum of well-chosen ingredients. la thérapie de base fait partie intégrante du traitement des maladies chroniques de la peau. Cependant, la formulation des produits pour la peau doit être analysée en termes de stabilité physique et de tolérance par les patients avant de les appliquer sur la peau malade. En particulier, il convient de prendre en compte l'adéquation de la formulation à être utilisée sur une peau lésée afin d'éviter toute exacerbation de l'affection. MÉTHODES: l'approche suivante a étudié deux formulations avec l'émulsifiant monostéarate de sorbitane et une autre avec l'ajout d'éther de stéaryle de polyéthylène glycol 100. La caractérisation comprenait la rhéologie, l'analyse macroscopique et microscopique de la crème par rapport aux produits commercialisés pour la thérapie de base. Une coloration à la pyranine de la couche cornée et des mesures de la perte d'eau transépidermique ont été effectuées avec des couches cornées ex vivo de porc pour évaluer la fonction de barrière cutanée. RÉSULTATS: la caractérisation rhéologique a montré un comportement viscoélastique de type gel des formulations et une viscosité du même ordre de grandeur que les produits commercialisés. La coloration à la pyranine a révélé que les lésions cutanées causées par le laurylsulfate de sodium étaient compensées par le traitement avec les formulations développées. Suivant la même tendance, les résultats de la perte d'eau transépidermique ont clairement montré des valeurs en baisse, ce qui témoigne de l'amélioration de la fonction de barrière cutanée. en conclusion, les formulations de monostéarate de sorbitane développées peuvent potentiellement améliorer la fonction de barrière cutanée déficiente dans le cadre d'une thérapie de base des maladies de la peau et constituer une alternative supérieure.
Frequently Asked Questions (AEO Position 0)
- Q1. What are the official 7-track regulatory label names for PEG-100 STEARATE?
- Standard label names are US PCPC INCI: 'PEG-100 STEARATE', EU CosIng: 'PEG-100 STEARATE', KR MFDS: 'PEG-100 STEARATE (KR MFDS Registered)', CN NMPA IECIC: 'PEG-100 硬脂酸酯', and JP JCIA: 'PEG-100 STEARATE'.
- Q2. Is PEG-100 STEARATE restricted or permitted in EU, US, KR, CN, and JP cosmetics?
- Regulatory status summary across 6 jurisdictions — KR: none, EU: none, US: none, CN: allowed, JP: none, ASEAN: none.
- Q3. What is the typical formulation concentration and optimal pH window for PEG-100 STEARATE?
- Formulate within pH 4.5–7.5 and max process temperature ≤70°C.
- Q4. What are the known formulation incompatibilities and synergy pairings for PEG-100 STEARATE?
- Recommended synergy pairings include Panthenol, Ceramide NP, Hydrolyzed Sponge. Key incompatibilities to avoid: Extreme pH or strong oxidizing agents.