

FAQ (Frequently Asked Questions)
1. What is Phenyl Trimethicone?
Phenyl Trimethicone is a silicone-based fluid (a siloxane) modified with phenyl groups. It’s a clear, non-greasy liquid used as an emollient, occlusive, conditioning agent, and antifoaming additive in
2. What are the CAS Number and INCI Name of Phenyl Trimethicone?
CAS Number: 73559‑47‑4
INCI Name: Phenyl Trimethicone
3. What benefits does Phenyl Trimethicone offer in personal care products?
Silky, Lightweight Emollient: Gives skin and hair a soft, smooth feel without greasiness
High Gloss & Shine: Phenyl groups enhance refractive index, providing shine in hair, lip, and skin products
Occlusive Moisture Barrier: Forms a breathable film that locks in hydration while allowing gas exchange
Anti‑Foaming & Spreadability: Reduces foam and improves product texture and application
4. In which types of products is Phenyl Trimethicone commonly used?
Phenyl Trimethicone is versatile and appears in:
Skin Care & Color Cosmetics: Foundations, primers, creams, lotions, lip glosses, highlighters, and eye makeup to deliver shine, slip, and a smooth finish
Hair Care: Conditioners, shine serums, styling products, and heat-protection fluids for smooth character and gloss
Sun Care & Shaving Products: Enhances water resistance, spreadability, and skin feel
5. Is Phenyl Trimethicone safe for personal care use?
Yes. The Cosmetic Ingredient Review (CIR) Expert Panel has classified phenyl trimethicone as safe at typical cosmetic usage levels (up to approx. 36%) based on a range of toxicological and human patch-testing studies
6. Can Phenyl Trimethicone cause skin irritation or clog pores?
It is non-comedogenic and generally non‑irritating—even on sensitive or acne-prone skin . Still, it’s always best practice to conduct a patch test, especially for sensitive skin.
7. How does Phenyl Trimethicone compare to other silicones?
It delivers a drier, non‑sticky finish and higher gloss than dimethicone, with excellent spread and anti‑tack properties. It also offers better heat and oxidation resistance.
8. Are there any environmental or handling concerns?
Phenyl Trimethicone is stable, resistant to heat/oxidation, and generally safe in formulations. It’s not water-soluble and should be handled according to standard manufacturing and safety guidelines.
9. Typical usage levels for Phenyl Trimethicone?
Formulators typically use it at 0.5–10% in products—5–7% is common in hair oils and gloss-enhancing
10. Are there alternatives to Phenyl Trimethicone?
Yes, depending on formulation goals:
Other Silicones: Dimethicone, cyclomethicone (for smoother feel but less gloss).
Natural Oils: Jojoba, almond, or argan oil (softer feel, less shine).