Advanced Silicone Formulation Science

Hydroxy Silicone Oil For Cosmetics And Personal Care

Next-Generation Hydroxy-Terminated Polydimethylsiloxane (OH Silanol Fluids): Enhancing Skin Feel, Film Permeability, Hair Cuticle Repair, and Superior Sensory Performance Across Modern Cosmetic Formulations.

Cosmetic & Personal Care Functional Silicone Fluids

Explore high-purity silanol and organosilicon solutions engineered to deliver lightweight emolliency, silkiness, and advanced barrier functionality.

OH-Hydroxy Terminated Silicone Fluid for Cosmetics

Primary Silanol Base

BY-209 Amino-Modified Conditioning Fluid

Intensive Hair Care

Hydrogen-Terminated Intermediate Fluid

Synthesis & Emulsion Grade

Vinyl Silicone Oil CAS Number: 70900-21-0

Vinyl Silicone Oil (CAS: 70900-21-0)

Silicone Elastomer Crosslinker

Fundamental Chemistry & Functional Characteristics in Personal Care

A comprehensive scientific breakdown of α,ω-dihydroxypolydimethylsiloxane (INCI: Dimethiconol) and its unique rheological impact on cosmetic matrices.

Terminal Silanol (Si-OH) Reactivity

Unlike non-functional dimethyl fluids, hydroxy silicone oil contains active terminal hydroxyl groups attached to the silicon backbone. This enables mild hydrogen bonding with keratin and skin lipids, providing superior substantive film formation without occlusive pore clogging.

Exceptional Sensory & Slip Profile

Delivers an ultra-soft, velvety, non-greasy after-feel. Its low surface tension (approx. 21–22 mN/m) facilitates rapid spreading, pigment wetting, and an instant cushion effect on the epidermis that elevates consumer perceptions of luxury beauty formulations.

Breathable Moisture Shield

Forms a semi-permeable, flexible barrier that retards transepidermal water loss (TEWL) while allowing physiological oxygen and water vapor exchange. This preserves skin homeostasis and shields hair strands from humidity-induced frizzing.

Hydroxy Silicone Oil (chemically identified as α,ω-dihydroxypolydimethylsiloxane or hydroxyl-terminated polydimethylsiloxane, often designated under the cosmetic nomenclature INCI: Dimethiconol) represents a pivotal specialty raw material in high-performance cosmetic design. The distinguishing biochemical attribute of this organosilicon polymer lies in its terminal silanol groups (-Si(CH₃)₂OH), which impart an amphiphilic character when interacting with surface hydroxyls, keratinaceous structures, and polar lipid matrixes.

While traditional inert polydimethylsiloxanes (PDMS) act purely through hydrophobic physical deposition, hydroxy-functional fluids introduce tailored interfacial compatibility. In cosmetic chemistry, viscosities vary across an extensive spectrum—ranging from low-viscosity volatile diluent companions (20–100 cSt) used for immediate dry-touch sensory transformation, to ultra-high-molecular-weight gum matrices (viscosities exceeding 500,000 to 2,000,000 cSt) dispersed in volatile silicones or cosmetic alkanes. These high-viscosity silanol fluids provide unprecedented shear-thinning characteristics, durable lubricity, and split-end encapsulation.

Formulation Synergy Insight

When combined with silicone resins (e.g., MQ resins) or amino-modified silicones, Hydroxy Silicone Oil forms continuous, elastic cross-linked meshworks on skin and hair shafts upon the evaporation of volatile carriers. This synergy yields transfer-proof cosmetic pigments, water-resistant sunscreen barriers, and heat-protective hair wraps resilient up to 230°C.

In-Depth Application Scenarios Across Cosmetic Segments

Explore how formulators deploy hydroxy silicone fluids to overcome technical formulation hurdles across haircare, skincare, makeup, and body treatments.

1. Advanced Hair Care & Cuticle Restoration

In premium hair serums, leave-in repair treatments, and salon conditioning balms, hydroxy silicone oil functions as the foundational sealing agent for damaged hair shafts. Hair weathering, chemical processing (bleaching, perming), and heat styling deplete the F-layer (18-methyleicosanoic acid lipid layer), leaving cuticles lifted and hydrophilic.

Hydroxy-terminated fluids selectively adhere to negative charges and damaged micro-fissures along the cortex. They seal split ends instantly through capillary bridging, lower wet and dry combing resistance by up to 85%, and dramatically diminish styling friction without accumulating heavy, greasy residues.

2. High-Performance Skincare & Anti-Aging

Modern anti-aging serums, peptide recovery creams, and optical-blurring primers utilize hydroxy silicone fluids to bridge the gap between active ingredient bioavailability and sensory pleasure. Hydroxy fluids create an imperceptible silky elastomer cushion that fills fine lines and textural imperfections via soft-focus optical scattering.

Furthermore, their chemical stability ensures that fragile actives like Retinol, Vitamin C derivatives, and biomimetic ceramides remain protected against environmental oxidation and premature aqueous degradation within anhydrous or water-in-silicone (W/Si) emulsion chassis.

3. Color Cosmetics & Long-Wear Foundations

Uniform pigment suspension is essential in high-definition foundations, concealers, liquid blushes, and transfer-resistant lip lacquers. Silanol fluids act as exceptional wetting agents for surface-treated metal oxide pigments (Titanium Dioxide, Iron Oxides) and cosmetic micas.

They prevent pigment agglomeration during homogenizing, eliminate streaking during product spread, and dry down into an elastic, hydrophobic film that repels perspiration, sebum sebum breakthroughs, and humidity, ensuring true-to-color 16-to-24 hour wear durability.

4. Suncare & Advanced Body Formulations

Modern SPF photoprotection mandates high water resistance without the tacky, suffocating feel traditionally caused by organic UV filters. Incorporating hydroxy silicone fluids into sunscreen emulsions creates a cohesive, uniform photoprotective veil over micro-topographical skin folds.

In men's grooming and shaving balms, it minimizes razor friction, curtails micro-lesions, and leaves a comforting post-shave protective matrix. In deodorants and antiperspirants, it suppresses the crystalline chalkiness of aluminum salts while optimizing glide.

Commercial Specifications & Formulation Engineering Matrix

Standard technical benchmarks and typical analytical data for cosmetic-grade hydroxy silicone fluids.

Physical / Chemical Parameter	Standard Low Viscosity Grade	Medium Viscosity Emulsion Grade	High-Molecular Gum Blend Grade	Functional Analytical Test Method
Appearance	Clear, colorless transparent liquid	Clear, viscous fluid	Viscous, crystal-clear liquid gum	Visual / Optical Inspection
Kinematic Viscosity (25°C, cSt)	50 – 200 cSt	750 – 5,000 cSt	50,000 – 1,000,000+ cSt	GB/T 265 / ASTM D445
Hydroxyl Group Content (-OH %)	1.5% – 3.2%	0.5% – 1.2%	0.05% – 0.25%	Chemical Titration / FT-IR
Refractive Index ($n_D^{25}$)	1.4000 – 1.4035	1.4020 – 1.4045	1.4030 – 1.4060	Abbe Refractometer (ASTM D1218)
Volatile Cyclic Siloxanes (D4+D5+D6)	< 0.1% (Low VOC)	< 0.1% (Compliant)	< 0.1% (Ultra-Clean)	Headspace GC-MS Detection
Recommended Dosage in Personal Care	1.0% – 5.0% (Lotions/Toners)	2.0% – 8.0% (Conditioners/Creams)	0.5% – 3.0% (Hair Serums/Primers)	Formulation Benchmarking

Emulsification & Processing Best Practices

Hydroxy silicone oils are soluble in low-molecular-weight cyclomethicones, hexamethyldisiloxane, phenyl trimethicone, isododecane, and most cosmetic fatty esters (such as Isopropyl Myristate and C12-15 Alkyl Benzoate). In Oil-in-Water (O/W) emulsions, pre-mixing the hydroxy fluid with the oil phase before homogenization at 65°C–75°C ensures homogeneous droplet dispersion without phase inversion.

For cold-process formulations (serums and gel-creams), hydroxy silicone oil can be effectively stabilized using synthetic polymeric thickeners (e.g., Acrylates/C10-30 Alkyl Acrylate Crosspolymer) or high-shear silicone emulsifiers, preserving formulation transparency and rheological stability.

Regulatory Compliance & Purity Safety

As international regulations (such as EU REACH Annex XVII) enforce stringent thresholds on volatile cyclotetrasiloxane (D4), cyclopentasiloxane (D5), and cyclohexasiloxane (D6) below 0.1% w/w, high-vacuum stripped hydroxy silicone oils represent an indispensable, safe alternative for global cosmetic compliance.

Cosmetic-grade hydroxy silicone oils are toxicologically inert, non-irritating to ocular and dermal tissues, non-sensitizing, and non-comedogenic. They do not penetrate the stratum corneum barrier, ensuring ultimate safety across leave-on face care, sensitive baby creams, and delicate lip cosmetics.

Global Market Trends & Future Innovations in Personal Care Silicones

Understanding industrial dynamics, sustainable synthesis routes, and formulation evolutions for 2025–2030+.

Clean Beauty & Eco-Conscious Syntheses

The transition towards low-carbon footprint processing has spurred next-generation catalysis that minimizes byproduct formation. Hydroxy silicone oils are increasingly combined with biodegradable plant-derived hemisqualane and bio-based esters to yield sustainable, hybrid sensory performance.

Rise of "Skinification" in Hair Care

Consumers increasingly demand skincare-grade ingredients within hair therapies. Silanol polymers, celebrated for cellular non-toxicity and biomimetic conditioning, lead the transformation of premium scalp care emulsions, thermal defense sprays, and post-coloration gloss elixirs.

Cross-Functional Multi-Tasking Systems

The rise of minimalist cosmetic routines (skinimalism) requires single formulations to deliver hydration, environmental pollution defense, sun filter stabilization, and velvet texture. Hydroxy fluids serve as the primary multifunctional chassis across these hybrid cosmetics.

About Bayee Chemical

A trusted global supplier with over 25 years of chemical manufacturing, quality control, and supply chain excellence.

Welcome to Hangzhou Bayee Chemical Co., Ltd.

Hangzhou Bayee Chemical Co., Ltd. started chemical products exporting from 2001, manufacturers based exporter focused in chemical products covering Silicone series, Phosphorus series including Silicone Monomers, Cyclosiloxane, Silicone Oils, Agro Chemicals, Fire Retardants & Auxiliaries etc.

Company has direct Import & Export right, Dangerous Cargo Permission Certificate. Based on 20+ years exporting history and persistent improvements, we have now grown and developed into a well known & good reputation exporter with ISO 9001:2015, AAA Credit certified company, also granted by local government as Healthy Enterprise, and A level Tax Ranking.

Business Licence No. / Social Credit Code: 91330108759549090L
Dangerous Cargo Certificate No.: [2025] 06002608
Import & Export Certificate No.: 02306457
AAA Credit Rating No.: BRC24AAA10012R2S
ISO:9001 Certificate: BRC2024Q10513R2S

25⁺

Years of Excellence

R&D and production experience

Strategic Production Bases & Quality Control Infrastructure

Based on strategic factories in Zhejiang, Jiangsu, Shandong, Anhui, Jiangxi, Hubei, Hunan, Hebei and Henan provinces etc, we export not only good quality products, competitive EXW costs, but also honesty, safety and international philosophies to customers.

We work tightly with competitive production sites across whole China, who have special advantages, located in professional industrial areas, close to raw material bases, locally supplied with energy - gas or steam pipe connected with neighbour enterprises in same areas to reduce transportation costs. Our factories have advanced ideas in technique crafts for higher yield production, unit consumption reducing from raw materials, also re-used the by-products for own downstream production for other products.

By the way, we always keep close observation about raw material changing trend, react actively with factories shoulder by shoulder from organizing raw material at good times to secure more competitive production costs and share spaces with customers helping win their market shares. At the same time, we have wide connection with Chinese powerful chemical institute organizations for testing and supervising quality control in production process.

Global Business & Distribution Footprint

Delivering high-purity organosilicon and specialty chemicals to formulation leaders across all continents.

Up till now we’ve developed and supplied to many countries and areas all over the world, with main markets in European countries (Germany, Italy, UK, Spain, Ukraine, Russia, Poland, etc.), USA, South America, Mid East, South-east Asia, Australia, etc. Also seeking more strategic partners and customers under mutual benefits and work through the whole purchasing chain.

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