In personal care fields such as skin care, sun care, color cosmetics, deodorants, antiperspirants, and hair conditioning, the four-dimensional indicators of "volatility — spreadability — silky feel — formulation compatibility" of oil-phase ingredients have always been the core contradiction restricting end-product experience and consumer satisfaction. Traditional cyclic silicones (e.g., D6), while spreadable, face increasing regulatory pressure. Ordinary methyl silicones, while inert, have high molecular weight and low volatility, leaving a greasy film and lacking a fresh silky feel. Some synthetic esters, though light, fail to balance the low surface tension and gloss unique to silicones. With the Clean Beauty trend and continuous upgrading of comprehensive demands for "non-comedogenic, silky smooth, highly compatible", finding a methyl trimethicone with "MT structure, viscosity 1.5 mm²/s, specific gravity 0.85, refractive index 1.385, content >99%" has become the core proposition for the refinement of domestic personal care silicones. Addressing this, Anhui IOTA Silicone Oil Co., Ltd. officially launches IOTA 9229 Methyl Trimethicone (INCI Name: Methyl Trimethicone). Characterized by "colorless transparent liquid; viscosity 1.5 mm²/s (25°C); refractive index 1.385 (25°C); specific gravity 0.85 (25°C); content >99%; MT-structured volatile siloxane; colorless, odorless, non-irritating; low surface tension", backed by "MT structure low surface tension + high volatility no residue + silky spread", it serves as the "silky choice" for personal care, achieving the leap from "traditional silicone greasy residue" to "MT siloxane silky fresh". System Positioning: MT-Structured Volatile Siloxane vs. Traditional Cyclic Silicone / Ordinary Methyl Silicone IOTA 9229 belongs to the methyl trimethicone (MT structure) system, distinct from traditional cyclic silicones and ordinary linear methyl silicones. Cyclic silicones (D6) are cyclic polymers, volatile but regulated. Ordinary dimethicone is a linear high polymer, non-volatile and prone to residue. The MT structure innovatively introduces trimethicone units into the main chain — the low molecular weight MT structure grants unique volatility, completely evaporating with no residue; meanwhile, extremely low surface tension brings excellent spreadability, giving skin a soft silky feel, thoroughly avoiding the application shortcomings of traditional silicones. Molecular Architecture: MT Structure Low Surface Tension + High Volatility No Residue + Silky Spread The core competitiveness of IOTA 9229 stems from the precision molecular design of methyl trimethicone:

• MT Structure Low Surface Tension: The molecular configuration of MT structure gives extremely low surface tension, enabling easy and uniform spreading on skin and hair, forming an ultra-thin breathable film; low surface tension also brings excellent wettability, improving formulation application performance.
• High Volatility No Residue: As a volatile siloxane, viscosity is only 1.5 mm²/s (25°C), low molecular weight, rapidly volatilizing after application without leaving an oily film or sticky feel, giving formulations a fresh and breathable skin feel.
• Silky Spread: During spreading, molecular arrangement is orderly, producing a unique silky touch; refractive index 1.385 gives high optical transparency, not affecting formulation appearance, reducing oiliness in color cosmetics and presenting a natural satin glow.

Performance Leap: From "Greasy Residue" to "Silky Fresh Highly Compatible" Introducing IOTA 9229 brings a qualitative leap to personal care formulations:

• Excellent Spreadability: Low surface tension, extremely easy to spread on skin, improving application uniformity and reducing "pilling" risk.
• High Compatibility: Highly compatible with various cosmetic ingredients (organic UV filters, pigments, oils, etc.), acting as a bridging ingredient to improve multi-phase formulation stability.
• Volatile No Residue: Completely volatile, no oily film residue, light and fresh non-greasy feel, suitable for oily/combination skin and summer formulations.
• Silky Skin Feel: Gives skin a soft silky feel, improving touch and enhancing product premiumness.
• High Purity Safety: Content >99%, colorless, odorless, non-irritating, physiologically inert, suitable for sensitive skin and children's care products.
• Low Density Light Texture: Specific gravity 0.85 (25°C), giving formulations an airy light texture.

Application Penetration: From Skin Care to Hair Conditioning The application boundary of IOTA 9229 covers all personal care scenarios requiring "fresh + silky + highly compatible":

• Skin Care & Sun Care (Main Battlefield): As carrier oil to improve spreadability of creams and lotions; in sunscreens to disperse organic UV filters, enhancing SPF while eliminating white cast, providing fresh silky touch.
• Color Cosmetics: Used in foundations, eyeshadows, lipsticks, etc., improving pigment dispersion, providing silky application and long-lasting wear; low refractive index reduces oiliness, presenting a satin finish.
• Deodorants & Antiperspirants: As volatile carrier, quickly volatilizing to leave a dry film, reducing sticky discomfort.
• Hair Conditioning: Used in shampoos, conditioners, hair masks, improving wet and dry combability, reducing frizz, imparting silky shine and soft touch to hair.
• Emulsion Carrier: Can be used in water-based systems via emulsification, expanding to more aqueous personal care formulations.

IOTA Technical Guide: Light Silky, Compatibility First

• Application: Can be used directly as carrier, main raw material, or additive; recommended usage adjusted per actual use; excellent compatibility with organic UV filters, pigments, oils for easy compounding.
• ⚠️ Taboo: Avoid prolonged contact with strong acids/bases; store in dry cool place, away from fire; sealed packaging to prevent contamination.
• Storage: Sealed in dry cool place, avoid direct sunlight and high temperature; shelf life 24 months.
• Handling: Colorless transparent liquid, viscosity 1.5 mm²/s convenient for metering and pumping; refractive index 1.385 for optical testing; specific gravity 0.85 for density verification; packaging: 20 L and 200 L iron drums, and other custom options.

Industry Insight: In personal care silicones, the molecular design of methyl trimethicone — "MT structure low surface tension + high volatility no residue + silky spread" — is the key path to achieving the trinity of "fresh feel + silky touch + high compatibility" — the introduction of MT structure solves the industry pain point of traditional methyl silicones: "greasy residue", while the ultra-low viscosity of 1.5 mm²/s ends the application shortcoming of volatile silicones: "insufficient spreadability". IOTA 9229, with "INCI Methyl Trimethicone + viscosity 1.5 mm²/s + specific gravity 0.85 + refractive index 1.385 + content >99%" hard metrics, fills the key supply chain link for domestic MT-structured siloxane in personal care (skin care/sun care/color cosmetics/deodorants/hair conditioning), providing a mass-producible silky high-performance silicone oil for downstream daily chemical enterprises. This confirms that domestic personal care silicones are leaping toward "cyclic silicone → linear silicone → MT-structured siloxane" in terms of silky feel and freshness, with growing technical say in high-end personal care fields.