With continuous innovation in skincare and hair‑care formulations, phenyl methyl silicone oil (INCI name: Phenyl Trimethicone, CAS#73559‑47‑4, chemical name: polymethylphenylsiloxane) is a modified silicone fluid dedicated to cosmetic applications, and has gained growing adoption in personal‑care systems. Also known as cosmetic‑grade methyl‑phenyl silicone oil, it addresses certain compatibility limitations of conventional dimethyl silicone oil, featuring alcohol solubility, easy emulsification and low‑tack sensory performance. It serves as a key functional additive for mid‑to‑high‑end personal‑care formulations.

1. Core Performance Benefits

1. Easy emulsification for standard manufacturing: It can be emulsified via general‑purpose cosmetic emulsification techniques without specialized modification equipment, lowering formulation‑debugging barriers.
2. Broad ingredient compatibility: It shows good miscibility with most cosmetic oils and organic components, minimizing risks of phase separation or precipitation and expanding raw‑material options for formulators.
3. Oxidation‑resistance for system stability: Its molecular structure delivers anti‑oxidative properties, helping maintain formulation stability throughout shelf‑life.
4. Non‑greasy feel and anti‑tack performance: It reduces stickiness derived from organic formulation ingredients, delivering smooth skin feel without heavy greasy residues.
5. Gloss‑boosting conditioning effect: It brings gloss and softness to hair strands in hair‑care products. When applied on skin, it forms a thin protective film to improve sensory experience.
6. Excellent alcohol solubility: Soluble in 95% ethanol at ambient temperature; up to 50 wt% solubility can be achieved at 4 °C, making it suitable for alcohol‑containing cosmetic systems.

2. Main Application Areas

• Skin care: Lotions, creams, shaving lotions. Works as a water‑proof additive to mitigate tackiness and improve spreadability.
• Hair care: Hair sprays, hair‑fixing products, hair gloss agents to achieve smooth and shiny hair performance.

3. Typical Technical Specifications (Cosmetic Grade @25℃)

Note: Refractive index acts as a rapid screening indicator for incoming phenyl silicone oil materials. The phenyl substitution ratio directly governs refractive index, solubility and sensory behavior. Refractive‑index testing is recommended for preliminary incoming‑quality verification.

FAQ

Q1: Are phenyl‑methyl silicone oil and phenyl silicone oil identical?
A: They belong to the same family of silicone fluids and are different industry aliases. Procurement decisions shall rely on measured phenyl‑segment content instead of product trade‑names only.

Q2: Is this material suitable for high‑alcohol formulations?
A: It features favorable ethanol solubility and maintains decent dissolution even under low‑temperature conditions, suitable for alcohol‑containing skincare & hair‑care formulas.

Q3: What are critical storage considerations?
A: Hermetic sealing is mandatory. Storage temperature should preferably stay below 25 °C. High‑temperature or open‑air storage shortens valid shelf‑life.

Q4: Can cosmetic‑grade phenyl‑methyl silicone oil be used in pharmaceutical preparations?
A: No. This grade is exclusively developed for cosmetic use and is not allowed for medical or pharmaceutical purposes。