In skincare, color cosmetics, sun care, hair care and antiperspirants, traditional volatile silicones evaporate too fast with short fragrance retention and dry skin feel; pure high-viscosity silanol spreads poorly, feels heavy and sticky; alcohol-based antiperspirants cause burning and irritation; common silicones cannot balance fast-dry volatility with long-lasting film-forming, let alone split-end repair and water-wash resistance. For demands of "cyclopentasiloxane fast-dry carrier + high-viscosity polydimethylsiloxanol long-lasting film + 24h fragrance sustained-release + soft smooth non-burning", a strictly controlled blend of cyclopentasiloxane and polydimethylsiloxanol welds fast-dry and long-care at one formulation. Addressing this, Anhui IOTA Silicone Oil Co., Ltd. launches IOTA 1501 Cyclopentasiloxane (and) Polydimethylsiloxanol. Contains ~15% high-viscosity polydimethylsiloxanol in cyclopentasiloxane. Appearance clear viscous liquid. Non-volatile content 14-15%. Viscosity (25℃) 4500-8000 mm²/s. Refractive index (25℃) 1.396. Flash point >62℃. Forms protective layer, softens skin, repairs split ends, long-lasting water-wash resistance; in antiperspirants delivers up to 24h sustained fragrance release, fast-dry, non-burning, soft smooth skin feel, outperforming alcohol-based formulations; skin feel equivalent to comparable high-viscosity silicone fluids. Applications: skincare, color cosmetics, sun care, hair care, body wash, antiperspirants and deodorants. Storage: original unopened container at ≤25℃. Brand IOTA. System Positioning: Cyclopentasiloxane-Silanol Blend Among Cosmetic Silicone Systems Within cosmetic silicone families, IOTA 1501 is a cyclopentasiloxane-hosted high-viscosity silanol dispersion, distinct from pure cyclopentasiloxane (too volatile, no residue film, short retention), pure polydimethylsiloxanol (extremely viscous, impossible to formulate alone), alcohol-based antiperspirants (burning, irritation, fragrance fades fast), ordinary dimethicone (no sustained-release, weak film). IOTA 1501 uses cyclopentasiloxane for fast-dry volatile carrier and spreading power, ~15% high-viscosity polydimethylsiloxanol for durable protective film and fragrance reservoir, positioning as "skincare film-former and softener + color cosmetic fast-dry gloss modifier + split-end repair depositor + antiperspirant sustained-release carrier + body wash water-wash-resistant conditioner", rather than mere volatile solvent or thickener. Molecular Architecture: Cyclopentasiloxane Carrying High-Viscosity Silanol + Non-Volatile 14-15% + Viscosity 4500-8000 IOTA 1501 core is biphasic: continuous phase cyclopentasiloxane (decamethylcyclopentasiloxane), low viscosity, low surface tension, rapid spreading, fast-dry non-residue; dispersed phase ~15% high-viscosity polydimethylsiloxanol (hydroxy-terminated PDMS), high MW, viscosity 4500-8000 mm²/s, delivering film-forming, lubrication and sustained-release scaffold. After blending, cyclopentasiloxane carries silanol to uniformly spread on skin/hair, evaporates leaving continuous silanol film, achieving "fast-dry + long-retention" dual effect. Non-volatile 14-15% corresponds to precise silanol loading; RI 1.396 near skin natural gloss; flash point >62℃ ensures process safety. Performance Leap: From "Fast-Dry No Film, Alcohol Burning" to "Cyclopentasiloxane Polydimethanol, Sustained-Release Soft-Care" With IOTA 1501, four-way synergy: sustained-release—silanol film in antiperspirants acts as fragrance reservoir for up to 24h release, outperforming alcohol-based systems, spray-applied non-burning, soft smooth feel; soft care—protective film softens skin, fast-dry non-tacky, highly compatible with cosmetic ingredients; split-end repair—high-viscosity silanol deposits on hair ends, repairing splits, lifting gloss and smoothness; water-wash resistance—silanol film resists rinsing, functioning in body wash, leaving skin moisturized post-wash. Application Penetration: From Skincare Makeup to Antiperspirant Deodorant Full Coverage IOTA 1501 covers six core scenarios.

• Skincare: facial serums, body lotions—protective film and soft feel; non-occlusive, lifts formula luxury.
• Color cosmetics: foundation, concealer, primer—fast-dry and gloss tuning; improves spread and wear.
• Sun care: sunscreen creams—water-wash resistance and even spread; lifts outdoor water resistance and film uniformity.
• Hair care: masks, conditioners, leave-in—split-end repair; silanol deposits on ends, repairing damage.
• Body wash: cleansing—water-wash resistant conditioning; skin non-dry post-wash, lasting fragrance.
• Antiperspirants & deodorants: roll-on, spray—24h sustained fragrance; fast-dry non-burning, full replacement of alcohol systems.

⚠️ Taboo: cyclopentasiloxane is volatile organic, keep from fire (flash >62℃); note limited compatibility with some high-concentration esters and vegetable oils (e.g., isopropyl myristate, isopropyl palmitate), pre-test required; storage temperature ≤25℃ to prevent phase separation or ring opening; use soon after opening, original sealed light-proof. IOTA Technical Guide: Store ≤25℃ Original Sealed Container IOTA 1501 is clear viscous liquid. Add directly into oil phase or emulsification stage at 0.5%~10% depending on product type. In antiperspirants as fragrance sustained-release carrier and skin-feel modifier; in hair care for deposition repair; verify compatibility with target formulation before scale-up. Store in original unopened container at ≤25℃, avoid high temperature and prolonged open. Industry Insight: Silicone blend selection is not the higher silanol content the better, but using cyclopentasiloxane evaporation rate for dry time, silanol viscosity for film thickness and release duration, non-volatile content for film persistence, compatibility matrix for formulation stability. For cosmetic formulators, IOTA 1501 uses one cyclopentasiloxane polydimethylsiloxanol blend across fast-dry, soft care, sustained-release and repair, taking cyclopentasiloxane polydimethanol and sustained-release soft-care as batch-checkable anchors, securing sensory experience and functional duration simultaneously.