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Hydrophobic Silica Powder is a silicon oxide made up of linear triatomic molecules in which a silicon atom is covalently bonded to two oxygens.
Hydrophobic Silica Powder may be synthesized by high temperature hydrolysis of SiCl4 in O2(N2)/H2 flame.
Hydrophobic Silica Powder is amorphous in nature and possesses very high specific area.
CAS Number: 112945-52-5
Molecular Formula: O2Si
Molecular Weight: 60.08
EINECS Number: 231-545-4
Synonyms: Silicon dioxide, Silica, Dioxosilane, 7631-86-9, Silicic anhydride, Diatomaceous silica, Wessalon, Zorbax sil, Silica amorphous, Silica colloidal, Sillikolloid, Extrusil, Santocel, Sipernat, Acticel, Carplex, Neosil, Neosyl, Porasil, Silikil, Siloxid, Zipax, colloidal silica, White carbon, Silicone dioxide, Cab-o-sil M-5, Vulkasil S, Snowtex O, Corasil II, Tokusil TPLM, Dri-Die, Manosil VN 3, Ultrasil VH 3, Ultrasil VN 3, Carplex 30, Carplex 80, Snowtex 30, Zeofree 80, Aerosil K 7, Min-U-Sil, Syton 2X, Positive sol 232, Aerogel 200, Aerosil 300, Aerosil 380, Amorphous silica dust, Ludox HS-40, Silanox 101, Vitasil 220, Positive sol 130M, Silicon dioxide (amorphous), Aerosil A 300, Aerosil E 300, Silicon dioxide fumed, Nalfloc N 1050, Quso 51, Quso G 30, Aerosil 200, SG-67, CHEBI:30563, ETJ7Z6XBU4, HK 400, CI 7811, U 333, INS-551, DTXSID1029677, INS NO.551, E-551, Precipitated amorphous silica, Sandstone, Silicea, Silica marina, Naturasil Scars, Olea Olidental, Super-cel, Fire Agate, Red Jasper, Red Quartz, Tigers Eye, Chrysolith 6X, Dioxide Silicon, Silicea 3X, Silicea 6X, Dental type silica, Honest-Paste Kids, Quartz 8, Silicea 12X, Silicea 30C, Silicea 30X, Aventurine 8101, Chrysoprase 8113, Quartz 30, Sandstone 8144, Aerosil 130, Hairballs, Silicea 200C, Silicea 200X, Skin Eruptions, Syloid 244, Aerosil 380, Carneol 8109, Citrine 8114, Fire Agate 8116, Red Jasper 8138, Red Quartz 8139, Silicea 8012, Tigers Eye 8152, Rose Quartz 8142, Quso G32, Naturasil Stretch Marks, RefChem:6681, Cab-O-Sil M-5P, Silica 6 Special Order, SILICEA 200CK, G32 Quso, Quso F-22, Quso G 32, silica (silicon dioxide), OPRECARE 12, OPRECARE 24, TONICPET 12, Jasper 17 SO, Quartz 60 SO, Silica 20 SO, Silica 30 SO, 28TAK Doux Tooth, Scar Removal Sheets, Silicea Organic Cane Sugar, Tooth Note Aqua Mint, 2080 Dentistry Night Fresh, Fruity Scrub Body Exfoliation, Phyenlimcide Toothpaste, Rxhomeo Combo 21, 2080 Dentistry Night Repair, Dr. Zenni Kids Toothpaste, DTXCID009677, Cinis comp 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Silica (SiO2), Hollow Silica Nanospheres, Aerosil M-300, Nyacol 830, Sibelite M3000, M4000, M6000, Quazo Puro, Caswell 734A, Sicron F300, Sikron F100, Spectrosil, Accusand, Coesite, Fuselex, Nalcast, Nyacol 1430, Optocil, Quartzine, Quarzsand, Rancosil, Suprasil, Tridimite, Silica amorphous fused, Siltex, Vitreous silica, Magnetic SiO2 particles, Tridymite dust, W12 filler, beta-Quartz, Fused quartz, MIN-U-Sil alpha quartz, Quartz-beta, Amorphous quartz, Dri-Die insecticide 67, Nalco 1050, Quazo puro, Silica amorphous fumed, Vitrified silica, Chromosorb P, MFCD00217788, Pyrogenic colloidal silica, Hydrophobic silica 2482, Silica fused, Suprasil W, Vitreosil IR, Borsil P, Silane dioxo-, SiO2 nanopowder 10–20 nm, Crystallized SiO2, CP-SilicaPLOT, Sea sand, Silicon oxide di-, Quarz sand German, S-Col, Admafine SO25H, SO25R, SO32H, SO-C2, SO-C3, Cristobalite asbestos, Keatite, Silica amorphous cryst-free, Stishovite, ED-C silica, Fuselex ZA30, As1 silica, CCRIS 2475, CCRIS 3699, DQ12, Agate (SiO2), Fumed synthetic silica, Tridymite crystalline, FB5 silica, Fuselex RD120, Silica gel 60 (40–63 μm), Corning 7940, Microcrystalline quartz, O2Si, Synthetic amorphous silica fumed, Denka F90, FB30, FB44, FB74, FS30, Dri-Die 67, Silica gel 60 (70–200 μm), Silica spherical 40–75 μm, WGL300, Cryptocrystalline quartz, FB20 silica, C18 silica packing, Elsil 100, F44 filler, SF35, Elsil BF100, F125 silica, F160 silica, Fuselex RD 40-60, Silica amorphous fused, Silica colloidal anhydrous, Silicon dioxide chemically prepared, EINECS 231-545-4, EINECS 238-455-4, EINECS 238-878-4, EINECS 239-487-1, UNII-ETJ7Z6XBU4, Silica crystalline quartz, Silicon dioxide vitreous, EPA Pesticide Code 072605, Magnetic Silica Microspheres, Silica 2482 hydrophobic, Silica crystalline quartz, Silica crystalline, Quartz crystalline, CAB-O-SIL N-70TS, Silica crystalline tridymite, Kieselgel, Silicagel, AF-SO25R, Quartz silica crystalline, Quarzglas, Silica flour, silica-gel, fused silica, Silica fumed, 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Hydrophobic Silica Powder is can be wetted by water, and dispersed in water forming a suspension.
When it firstly produced from oxyhydrogen flame，the moisture content is very low take XYSIL200 for example, it is around 0.48 wt%.
If exposed into air for about 30 seconds to 180 seconds, this number will be double or even tripled.
Hydrophobic Silica Powder is a finely divided form of silicon dioxide whose surface contains abundant hydroxyl groups that strongly attract and interact with water molecules.
These hydroxyl groups make the surface highly polar, enabling the powder to disperse easily in aqueous systems and absorb moisture from the environment.
Because of this strong affinity with water, hydrophilic silica is widely used in formulations that require rapid wetting, thickening, or moisture control.
The material is typically produced as fumed silica or precipitated silica, both of which have extremely high surface areas due to their nanometer-sized primary particles.
This high surface area allows the powder to form three-dimensional hydrogen-bond networks that increase viscosity, stabilize dispersions, and prevent liquid separation in many products.
As a result, hydrophilic silica is a key ingredient in adhesives, coatings, sealants, and numerous polymeric systems where rheology control is required.
Hydrophobic Silica Powder acts as an efficient anti-caking agent by absorbing excess moisture and preventing powders from clumping together during storage or transport.
This property makes it valuable in food products, pharmaceuticals, cosmetics, and industrial powders where free-flowing consistency is essential.
Its ability to interact with moisture without dissolving ensures long-term stability and consistent product performance.
In cosmetics and personal-care applications, hydrophilic silica improves texture, enhances spreadability, and increases the stability of emulsions and creams.
Its moisture-attracting surface helps maintain smooth consistency while preventing phase separation between oils and water-based components.
Because of these stabilizing properties, it is frequently used in foundations, lotions, sunscreens, and skin-care formulations.
Hydrophilic silica also functions as a reinforcing filler in rubber, resins, and composite materials by increasing strength, stiffness, and durability.
Its fine particle structure forms strong intermolecular interactions within polymer matrices, improving mechanical properties without adding significant weight.
This makes it suitable for use in automotive components, sealants, and industrial elastomers where enhanced performance is required.
The material is widely used in chromatography as a highly porous support that provides strong interactions in normal-phase separations.
Its hydrophilic surface enables selective retention of polar analytes, making it essential for analytical and preparative separation techniques.
The consistent particle structure ensures reproducibility, high resolution, and stable chromatographic performance.
Hydrophobic Silica Powder is also employed in electronics and semiconductor processing as a polishing and planarization aid due to its hardness and purity.
These properties allow it to remove microscopic irregularities without introducing contamination, which is critical for producing high-performance microchips and optical components.
Its controlled particle size distribution ensures extremely precise polishing outcomes in advanced manufacturing.
Orthorhombic structures are the product of stretching a cubic lattice along two of its orthogonal pairs, resulting in a rectangular prism shaped crystal structure.
The hydrophobic groups are normally alkyl or polydimethylsiloxane chains.
Hydrophobic Silica Powder displays water resistant properties because of its nanostructure and chemical properties.
When applied to a surface of a material, the nanoparticles adhere to the host material and prevent liquids from permeating the rough texture.
The water only comes into contact with the tips of the nanoparticles coating the outside of the material.
Due to lack of attraction, the water is repelled from the hydrophobic silica.
Hydrophilic fumed silica refers to high-purity amorphous silica micro powder directly generated by the high-temperature hydrolysis of volatile chlorosilanes in a hydrogen-oxygen flame.
Hydrophobic Silica Powder undergoes accumulation, purification, collection, compression, and packaging without any other chemical treatment.
The particle surface retains a large number of silanol groups (Si–OH), which endow it with excellent hydrophilicity.
This loose white powder can be wetted by water and disperses well in water.
Hydrophobic Silica Powder is based on hydrophilic fumed silica powder products after-treated with HMDS (hexamethyldisilazane) and DDS (Dimethyldichlorosilane) based superficial treatment, or structure modified.
Hydrophobic Silica Powder is a form of silicon dioxide (commonly known as silica) that has hydrophobic groups chemically bonded to the surface.
Hydrophobic Silica Powder has an orthorhombic crystal structure (its space group name is Pmna under the bipyramidal point group).
Hydrophobic Silica Powder can be processed in different ways; such as fumed silica, precipitated silica, and aerosol assisted self assembly, all existing in the form of nanoparticles.
Hydrophobic Nano Silica/Silicon Dioxide/SiO2 Powder (Oil Soluble) is a specialized nanomaterial designed for use in oil-based systems.
With its hydrophobic nature and nano-sized particles, this powder enhances the properties and stability of oil-based formulations across various applications.
Hydrophobic fumed silica is generally a post-treated product.
Hydrophobic Silica Powder hydrophobic silicas is produced by the chemical reaction of hydrophilic silica with reactive silanes or silicone fluids, like chlorosilanes, hexamethyldisilazane and polydimethysiloxane.
They have water-repellent properties and are no longer dispersible in water.
Hydrophobic Silica Powders are widely used in silicone adhesives & sealants, silicone elastomers, coatings & inks, composites, personal care cosmetics and fire extinguisher.
They are used to for rheology control (thickening, anti-sag, anti-setting, thixotropy), reinforcing (improve strength).
Hydrophobic Silica Powders are very effective thixotropic in polar adhesives and sealants like isocyanate resins, epoxy resins, silicone resins, polyurethane resins and vinylester resins.
And they can be used for reinforcing silicones without thickening.
Hydrophobic Silica Powder, the noncrystalline form of SiO2, is a transparent to gray, odorless, amorphous powder
Hydrophobic Silica Powder is a submicroscopic fumed silica with a particle size of about 15 nm.
Hydrophobic Silica Powder is a light, loose, bluish-white-colored, odorless, tasteless, amorphous powder.
Melting point : >1600 °C
Density : 2.3 lb/cu.ft at 25 °C (bulk density) (lit.)
Refractive index : n20/D 1.46 (lit.)
Solubility : Practically insoluble in organic solvents, water, and acids except HF; soluble in hot alkali hydroxide; forms colloidal dispersion with water; Aerosil water solubility 150 mg/L at 25–8 °C (pH 7)
Form : Powder
Specific Gravity : 2.2
Hydrolytic Sensitivity : 5 – forms reversible hydrate
InChI : InChI=1S/O2Si/c1-3-2
InChIKey : VYPSYNLAJGMNEJ-UHFFFAOYSA-N
SMILES : Si=O
Hydrophobic Silica Powder is frequently added to suppository formulations containing lipophilic excipients to increase viscosity, prevent sedimentation during molding, and decrease the release rate.
Hydrophobic Silica Powder is also used as an adsorbent during the preparation of wax microspheres; as a thickening agent for topical preparations; and has been used to aid the freeze-drying of nanocapsules and nanosphere suspensions.
Initially, Hydrophobic Silica Powder is hydrophilic due to the presence of the silanol (Si-OH) groups on the surface of the particle.
These silanol groups can chemically react with various reagents to render the silica hydrophobic.
There are many different methods of processing silica to become hydrophobic, mainly by adding hydrocarbon groups.
Hydrophobic Silica Powder, also known as pyrogenic silica because it is produced in a flame, consists of microscopic droplets of amorphous silica fused into branched, chainlike, three-dimensional secondary particles which then agglomerate into tertiary particles.
The resulting powder has an extremely low bulk density and high surface area.
Its three-dimensional structure results in viscosity-increasing, thixotropic behavior when used as a thickener or reinforcing filler.
Hydrophobic Silica Powder is hygroscopic but adsorbs large quantities of water without liquefying.
When used in aqueous systems at a pH 0–7.5, colloidal silicon dioxide is effective in increasing the viscosity of a system.
However, at a pH greater than 7.5 the viscosityincreasing properties of colloidal silicon dioxide are reduced; and at a pH greater than 10.7 this ability is lost entirely since the silicon dioxide dissolves to form silicates.
Hydrophobic Silica Powder should be stored in a well-closed container.
Hydrophobic Silica Powder has a wide range of hydrophilic fumed silica for sale with different surface area.
Hydrophobic Silica Powder high purity hydrophilic fumed silica is manufactured by hydrolysing volatile chlorosilanes in an oxyhydrogen flame.
In chemical terms, the loose white silicone powder consists of highly pure amorphous silicon dioxide.
Hydrophobic Silica Powder is wetted by water and can be dispersed in water.
They have good temperature resistance, chemical resistance and thixotropic properties.
Hydrophobic Silica Powder possesses an exceptional ability to create thixotropic structures, meaning it can increase viscosity under static conditions while thinning under shear.
This behavior allows formulations such as gels, coatings, and sealants to remain stable in storage yet spread or pump easily when mechanical force is applied.
Such thixotropic control is essential for applications requiring precise flow characteristics, including paints, printing inks, and chemical grouts.
The powder exhibits excellent compatibility with a wide range of water-based systems due to its strong affinity with polar solvents.
Because it disperses readily in aqueous media, it can be used to stabilize suspensions, improve homogeneity, and prevent sedimentation of pigments or active ingredients.
This makes Hydrophobic Silica Powder valuable in agricultural chemicals, waterborne coatings, and pharmaceutical suspensions where phase separation must be avoided.
Hydrophobic Silica Powderalso reduces syneresis, which is the separation of liquid from gels or pastes, by forming a stable network within the formulation.
This structural network traps water and prevents it from migrating or pooling during storage or temperature fluctuations.
As a result, products such as food gels, cosmetic creams, and pharmaceutical ointments remain uniform and visually appealing over time.
In controlled-release formulations, Hydrophobic Silica Powder can encapsulate or adsorb active compounds onto its highly porous surface.
This adsorption allows drugs, fragrances, or nutraceuticals to be released slowly and consistently when exposed to moisture or biological fluids.
Such controlled-release behavior enhances product performance and improves user experience in both therapeutic and consumer applications.
The powder’s exceptionally low bulk density enables it to be used as a lightweight filler that increases volume without significantly adding weight.
This characteristic is especially advantageous in plastics, rubbers, and construction materials where density reduction can improve handling, reduce transportation costs, and enhance shock absorption.
Its ability to maintain structural integrity while remaining lightweight offers numerous design benefits in modern material engineering.
Hydrophobic Silica Powder also provides excellent matting properties in coatings by scattering light uniformly across the surface.
This uniform light scattering produces a smooth, low-gloss finish desirable in furniture coatings, architectural paints, and premium surface treatments.
Its fine particle structure ensures consistent optical effects without compromising transparency or color fidelity.
In thermal insulation systems, Hydrophobic Silica Powder contributes to reduced thermal conductivity thanks to its porous and amorphous internal structure that inhibits heat transfer.
This insulating effect is useful in industrial applications such as refractory coatings, thermal management components, and fire-protection materials.
Its stability at high temperatures ensures long-term performance even under demanding operational conditions.
Hydrophobic Silica Powder also plays an essential role in environmental remediation technologies by acting as a highly efficient adsorbent.
Its porous structure and hydrophilic surface allow it to capture polar contaminants, heavy metals, and organic pollutants from water or industrial effluents.
This adsorption capability helps improve water quality and supports sustainable treatment processes in environmental engineering.
Fumed silicas by Hydrophobic Silica Powder, a reliable silicone manufacturing company, are widely used in adhesives & sealants, silicone elastomers, coatings & inks, composites, personal care cosmetics and fire extinguisher.
Hydrophobic Silica Powder fumed silicas are used to for rheology control (thickening, anti-sag, anti-setting, thixotropy), reinforcing (improve strength).
Hydrophobic Silica Powder fumed silicas provide good scratch and abrasion resistance, free-flow and anti-caking, corrosion resistance, and enhanced adsorbency.
Silica particles can become hydrophobic through plasma polymerization.
In this process, plasma polymerized 1,7-octadiene (ppOD) (related to the diene hydrocarbons) is used to deposit polymer films onto the silica particles.
The ppOD films are deposited through the use of radio frequencies, along with a reactor containing a rotating chamber.
Using low specific energy plasma conditions, the ppOD films chemically render the silica particles hydrophobic.
By using the ppOD films, the hydrophilic polar Si-OH groups in the polymer itself are concealed by non-polar CxHy hydrocarbon groups, so when it's applied as a film to the silica particles, they become hydrophobic as well.
Hydrophobic Silica Powder supplied by SiSiB are useful for thickening non-polar solvents such as xylene, styrene and mineral spirits.
When fumed silica is dispersed in a non-polar liquid, the silanol groups on the surface of different particles can interact through hydrogen bonding to form a bridge.
A three-dimensional structure is formed with a thickening effect.
Hydrophobic Silica Powder is used as a mineral, natural or synthetic fiber.
A potential danger to those involved in the production and handling of fumed silica for paint pigments or catalysts.
Diatomaceous earth is used in clarifying liquids, in manufacture of fire brick and heat insulators; used as a filtering agent; as a filler in construction materials; pesticides, paints, and varnishes.
A potential danger to those involved in mining of diatomaceous earth or fabrication of products there from.
Hydrophobic Silica Powder is a noncombustible solid. Generally unreactive chemically.
Incompatible with fluorine, oxygen difluoride, chlorine trifluoride.
Soluble in molten alkalis and reacts with most metallic oxides at high temperature.
Hydrophobic Silica Powderis widely used in pharmaceuticals, cosmetics, and food products.
Its small particle size and large specific surface area give it desirable flow characteristics that are exploited to improve the flow properties of dry powders in a number of processes such as tableting and capsule filling.
Hydrophobic Silica Powder is also used to stabilize emulsions and as a thixotropic thickening and suspending agent in gels and semisolid preparations.
With other ingredients of similar refractive index, transparent gels may be formed.
The degree of viscosity increase depends on the polarity of the liquid (polar liquids generally require a greater concentration of colloidal silicon dioxide than nonpolar liquids).
Viscosity is largely independent of temperature.
However, changes to the pH of a system may affect the viscosity1.
In aerosols, other than those for inhalation, Hydrophobic Silica Powder is used to promote particulate suspension, eliminate hard settling, and minimize the clogging of spray nozzles.
Hydrophobic Silica Powder is also used as a tablet disintegrant and as an adsorbent dispersing agent for liquids in powders.
Uses Of Hydrophobic Silica Powder:
Hydrophobic Silica Powder is widely used as a thickening and rheology-control agent in water-based systems because its surface strongly interacts with polar solvents.
This allows manufacturers to precisely adjust viscosity in products such as paints, inks, adhesives, and sealants without altering their chemical composition.
By controlling flow and stability, it ensures consistent performance during application and long-term storage.
Hydrophobic Silica Powder is extensively utilized as an anti-caking and free-flow agent in powdered foods, pharmaceuticals, and nutritional supplements.
The powder absorbs excess moisture on particle surfaces and prevents clumping, allowing granules to remain dry, uniform, and easily pourable.
This improves shelf stability and enhances the handling characteristics of hygroscopic materials.
In cosmetics and personal care products, Hydrophobic Silica Powder improves texture, spreads evenly, and enhances the sensory feel of creams, lotions, and makeup.
It absorbs oils and water efficiently, creating matte finishes and long-lasting formulations that resist separation.
Its fine particle structure also contributes to silky skin feel and smooth product application.
Hydrophobic Silica Powder serves as a carrier or adsorbent for active ingredients in pharmaceuticals, agrochemicals, and fragrances.
Its high surface area allows it to hold significant amounts of actives and release them in controlled and predictable ways.
This controlled-release property is essential for delivering consistent therapeutic, functional, or aromatic effects.
In the food industry, Hydrophobic Silica Powder is used as a stabilizer and dispersing agent for flavors, colorants, and nutrient additives.
It prevents phase separation in emulsions and enhances uniform distribution of ingredients in beverages, sauces, and specialized nutrition products.
Its inert nature ensures that it does not alter taste, color, or nutritional content.
Hydrophobic Silica Powder is used as a matting agent in coatings where a low-gloss or satin appearance is desirable.
Its ability to scatter light uniformly across surfaces creates a controlled matte finish without compromising durability or color depth.
This makes it valuable in architectural paints, furniture coatings, and industrial surface treatments.
In catalysis and chemical processing, Hydrophobic Silica Powder functions as a support material for catalysts due to its high porosity and stable surface chemistry.
It provides an optimal environment for catalytic reactions by enhancing surface contact between reactants and active sites.
Its thermal stability and chemical resistance allow it to perform reliably in demanding industrial processes.
Hydrophobic Silica Powder is used in chromatography as a stationary phase because of its consistent pore structure and strong affinity for polar molecules.
This property enables precise separation and purification of chemical compounds in laboratory and industrial settings.
Its uniform particle size distribution provides reproducible flow characteristics and accurate analytical results.
The material is used in rubber and plastics as a reinforcing filler that improves tensile strength, hardness, and abrasion resistance.
Its hydrophilic nature interacts strongly with polar polymer matrices, enhancing mechanical performance and product durability.
This makes it suitable for manufacturing specialized elastomers, seals, gaskets, and industrial polymer components.
Hydrophobic Silica Powder plays a role in environmental technologies where it acts as an adsorbent for contaminants in wastewater and industrial effluents.
Its porous structure captures polar molecules and dissolved impurities, improving purification efficiency.
This capability supports sustainable water treatment and pollution-control processes.
Hydrophobic Silica Powder is used to solve technical problems in a number of products including, but not limited to, paints, inks, adhesives, plastics, coatings, toners, defoamers, silicone rubber, sealants, cosmetics, food additives, polyester resins, cable gels, and greases.
It's often manufactured as both single and multiphase composites in order to enhance properties such as dispersion, stability behavior, resistance to water, and functionality.
Hydrophobic Silica Powder has been added to aerogels to increase their ability to adsorb organic pollutants without disrupting the network structure.
Hydrophobic Silica Powder can be used to treat other surfaces to become hydrophobic, this is due to the morphology of the silica particles once they adhere to their host.
The silica particles then alter the surface of its host material resulting in a hydrophobic surface.
Aggregated fumed silica can be applied to large surfaces to render them hydrophobic.
Micro and nanoscale structures, resembling ball and block like forms, are attributed to the hydrophobic characteristics.
Due to the change in the original surface's texture, the roughness of the surface causes its hydrophobicity to increase.
This is because when water comes into contact with the rough surface, it only touches the tips of the rough texture and doesn't permeate any deeper through the rest of the air occupied structure.
The water can't spread through the surface, thus yielding hydrophobic properties.
Hydrophobic Silica Powder has interesting thickening and thixotropic properties, and an enormous external surface area.
Hydrophobic Silica Powder is produced by a vapor phase hydrolysis process using chlorosilanes or substituted silanes such as, silicon tetrachloride in a flame of hydrogen and oxygen.
This material is formed and collected in a dry state.
Hydrophobic Silica Powder contains no detectable crystalline silica.
Safety Profile Of Hydrophobic Silica Powder:
Hydrophobic Silica Powder should therefore not be administered parenterally.
Hydrophobic Silica Powder can pose inhalation hazards because its very fine particles can become airborne easily during handling or processing.
When inhaled in significant quantities, these tiny particles may irritate the respiratory tract and cause symptoms such as coughing, dryness, or mild breathing discomfort.
Repeated or prolonged exposure to high dust levels can increase the risk of inflammation or chronic respiratory irritation in sensitive individuals.
Although hydrophilic silica is generally considered chemically inert, it can cause mechanical irritation to the eyes if dust comes into contact with the surface of the eye.
This irritation may manifest as redness, tearing, or a gritty sensation that can persist until the particles are washed out thoroughly.
Proper protective eyewear is recommended during handling to prevent accidental exposure.
Skin contact with Hydrophobic Silica Powder typically does not cause chemical burns or toxicity, but it may lead to dryness or physical irritation due to its highly absorbent surface.
This drying effect results from the powder removing natural oils and moisture from the skin, which may lead to flaking or mild discomfort with repeated contact.
Wearing gloves can help prevent chronic dryness or irritation in occupational settings.
Poison by intraperitoneal, intravenous, and intratracheal routes.
Moderately toxic by ingestion an inhalation hazard.
Much less toxic than crystalhe forms questionable carcinogen with experimental carcinogenic data.
Hydrophobic Silica Powder is widely used in oral and topical pharmaceutical products and is generally regarded as an essentially nontoxic and nonirritant excipient.
However, intraperitoneal and subcutaneous injection may produce local tissue reactions and/or granulomas.
