In the personal-care "volatile cyclic + high-MW silicone gum sol" spectrum, the "D4/D5 cyclic blend anti-freeze window" and "13% ultra-high-viscosity dimethiconol (hydroxyl-terminated PDMS gum) dissolved state" jointly dictate initial spread on skin/hair, post-volate water/soap-wash substantivity of residual film, and detackification boundary of greasy formulas. Pure D5 dissolves gum but leaves thin film easily washed off; gum alone >1M cSt is unpumpable. As water-resistant sunscreens, self-tanners, split-end serums, and rich face creams demand "cyclics as carrier + 13% gum as long-wear film + fp -18℃ + 13% NV metered," sourcing an INCI Cyclopentasiloxane(and)Cyclotetrasiloxane(and)Dimethiconol, clear-hazy viscous liquid, NV 13%, viscosity 6000mm²/s, flash 52℃, SG 0.960, nD 1.397, fp -18℃, D4<43% has become the core gap for domestic DC-1401-grade substantive conditioner localization. Addressing this "gum-carrier film" pain point, Anhui IOTA Silicone Oil Co., Ltd. (IOTA) officially launches IOTA-1401 Cyclopentasiloxane (and) Cyclotetrasiloxane (and) Dimethiconol (clean substitute for Dow XIAMETER™ PMX-1401 / Silway 5401). Characterized by "clear-to-hazy viscous liquid, NV 13%, viscosity 6000mm²/s (25℃), closed-cup flash 52℃, SG 0.960 (25/16℃), nD 1.397, fp -18℃, D4<43%, store ≤25℃ sealed original, 190kg iron/950kg IBC," and backed by "D4/D5 anti-freeze carrier + 13% hydroxyl-ended gum sol + post-volate wash-resistant film," it serves as the "suspension-gum silicone anchor" for active delivery and velvet touch in creams/makeup/sunscreen/split-end care. Molecular Architecture: D4/D5 Anti-Freeze Carrier + 30% Gum Sol + Volate-Leave-Film 3D Logic The core competitiveness of IOTA-1401 stems from its "13% ultra-high-viscosity dimethiconol (α,ω-dihydroxy PDMS gum, apparent 6000cSt by cyclic dilution) dissolved in specially blended cyclotetrasiloxane (D4) + cyclopentasiloxane (D5)" clear suspension architecture:

• D4/D5 Anti-Freeze Carrier: Pure D5 fp ~-38℃, pure D4 ~17.5℃; D4 kept <43% with D5 drives blend fp to -18℃—borrows D4 higher bp to slow overall evap (longer film than pure D5) while preventing D4 crystallization; cyclic surface tension ~20mN/m acts as "mover" spreading gum into skin ridges/hair cuticles.
• 13% Hydroxyl Gum Sol: Dimethiconol –OH ends make it more surface-substantive and keratin-affinic than dimethicone; 13% is the balance of "pourable viscous" vs. "enough film"—below 8% film too thin, above 18% pasty; 6000cSt is the flow sweet-spot at this loading.
• Volate-Leave Wash-Resistant Film: After application D4/D5 escape in minutes, 13% gum stays on skin/hair as breathable (non-occlusive), water-soak-resistant, soap-wash-resistant physical film; sunscreen/emollient/moisturizer embedded inside gain substantivity—effective after 3 washes.

Performance Leap: From "Pure D5 Thin Fast-Film" to "13% Gum Wash-Stable Film" Incorporating IOTA-1401 enables qualitative leaps:

• Water-Resistant Sunscreen: 3-8%—measured SPF +10-15% (uniform fewer holes), >75% SPF retention after 40min water immersion (pure D5 ~50%), no white run on sweat.
• Self-Tanner (DHA): 2-6%—gum film slows DHA diffusion into sweat glands, more even tone, less streaking, no abrupt fade after shower.
• Split-End Serum: 3-10%—gum anchors at split cuticle, wet-comb drag -40%+, dry gloss up, still sleek after 2 washes (plain silicone gone after 1).
• Rich Face/Lip Cream: 1-5% with lanolin/squalane—gum detackifies "greasy" into "velvet," no comedogenic闷闭口.

Application Penetration: From Sunscreen to Split Ends IOTA-1401 covers sectors triply sensitive to "long substantivity + velvet touch + greasy-detack":

• Skincare: Creams, lotions, sunscreens, self-tanners, night creams, lip care.
• Color: Foundation, primer, long-wear lipstick, eye-liner gel (sebum-migration resistant).
  / Haircare: Conditioner, hair oil, split-end repair, post-color care.
• Body: Water-resistant body SPF, silky body lotion, roll-on (control residue if leave-on).

IOTA Technical Guide: Oil-Phase Direct, Add <50℃

• Emulsion: Direct to oil phase (1-8%); if oil phase melts >60℃, add slowly with high shear after emulsion forms and temp drops below 50℃—prevents cyclic flash-off and gum agglomeration.
• Anhydrous/Oil Base: Add other cosmetic raw materials (esters/waxes/oils) slowly INTO IOTA-1401 (reverse order), not vice-versa—ultra-high-MW gum has one-way compatibility, reverse mix avoids lumps.
• Dosage: Skincare 1-5%, sunscreen 3-8%, makeup 2-6%, haircare 3-10%; >10% risks pilling, defoaming, heavy film.
• Taboo Red Line: Flash 52℃ closed, flammable, keep from open flame/static/>60℃ long heat; D4<43% but still REACH/(EU)2024/1328 watched—EU leave-on SKUs D4/D5/D6 each <0.1% from 2027-06-06, this product not directly usable, switch to iso-dodecane/linear volatile gum carrier; store ≤25℃ sealed original, use soon after opening.
• Storage: 190kg iron / 950kg IBC; ≤25℃ original unopened (typ. 24mo); manage as flammable liquid, non-toxic non-corrosive, away from heat/spark.

Industry experts note that under high-tier water-resistant sunscreen, haircare "split-end repair" positioning, and rich-cream detackification trends, 13% gum suspended in D4/D5 substantive conditioners are upgrading from "Dow PMX-1401 followers" to "wash-stable substantivity reference carriers." IOTA-1401, with its "13% NV + 6000cSt + D4<43% + fp -18℃ + PMX-1401 parity" hard metrics, fills the domestic supply chain gap for DC-1401-grade suspension gum in sunscreen/self-tan/hair-repair fields, providing a mass-producible path to replace imported Dow XIAMETER PMX-1401, Momentive Silway 5401 for downstream daily-chem plants; meanwhile reminds formulators—it solves wash-stable substantivity and velvet feel, not the EU 2027 leave-on D4/D5 cliff; export SKUs must parallel-build iso-dodecane gum-carrier routes. This confirms domestic personal-care silicones are advancing steadily along "pure D5 volatile → D5/D6 blend → D4/D5 carrying 13% dimethiconol gum," with growing technical say in wash-stable substantivity key carriers.