Silicon dioxide is a silicon oxide made up of linear triatomic molecules in which a silicon atom is covalently bonded to two oxygens.
How much products actually contain
No product states its amount yet.
Of the products containing it, 3,852 list it before the 1% line and 464 after it (usually 1% or less).
Products using this ingredient
12 of 4,243 confirmed · likeliest to carry enough first · See all 4,243
numbuzinnumbuzin No.1 Pantothenic Skincare 100 Powder
tartetarte fake awake™ duochrome liner
wet n wildwet n wild Chameleon Chrome Eyeshadow | Comet Couture
wet n wildwet n wild Chameleon Chrome Eyeshadow | Lunar Voltage
wet n wildwet n wild Chameleon Chrome Eyeshadow | Meteor Muse
wet n wildwet n wild Chameleon Chrome Eyeshadow | Moon Flare
wet n wildwet n wild Chameleon Chrome Eyeshadow | Nebula Rush
wet n wildwet n wild Chameleon Chrome Eyeshadow | Starlight Fever
tartetarte smooth operator™ Amazonian clay finishing powder
R+CoR+Co PICTURE THIS Dry Texture Balm
Juvia's PlaceJuvia's Place Culture Multi-Chrome Shadow
COSRXCOSRX Poreless Clarifying Charcoal Mask Pink
Definition
Silicon dioxide is a silicon oxide made up of linear triatomic molecules in which a silicon atom is covalently bonded to two oxygens.
Source: PubChem
Silicon dioxide
Cosmetic roles
Makes a clear formula opaqueOPACIFYINGAbsorbs water or oilABSORBENTScrubs physicallyABRASIVEStops powders from cakingANTICAKING
Safety & regulatory references
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
More data — names, identifiers, properties, test records, literature
Names & identifiers
SOLUM DIATOMEAEINCISilicaSynonym
- CAS No.chemical registry number
- 7631-86-9
- EC No.EU chemical inventory number
- 231-545-4
- DTXSIDUS EPA chemical ID
- DTXSID1029677
- DTXCIDUS EPA compound ID
- DTXCID009677
- IUPAC
- Silanedione
- Molecular formula
- O2Si
- Molecular weight
- 60.083 g/mol
Measured properties
- Appearance
- Transparent to gray, odorless powder. Irritating to the skin and eyes on contact. Inhalation will cause irritation in the respiratory tract. [Note: Amorphous silica is the non-crystalline form of SiO2.] · Dry Powder, Other Solid, Large Crystals, CBI
- Odour
- Odorless · odourless
- Boiling point
- 4046 °F at 760 mmHg (NIOSH, 2024) · 4046 °F
- Melting point
- 3110 °F (NIOSH, 2024) · 3110 °F
- Solubility
- Insoluble (NIOSH, 2024) · The solubility of the various phases of silicas is very complex and depends upon several factors. Solubility increases with temperature and pH and is affected by the presence of trace metals. Particle size influences the rate of solubility. /Silica/
- pH
- 3.5-4.4
- Melting/freezing point
- &, gt, 1600 ℃
- Initial boiling point and range
- &, gt, 2230 ℃
- Relative density
- 2.19-2.66
- Molecular weight
- 60.09
Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.
Source: PubChem · KOSHA safety data sheets (Korea)
What products actually use it for
What the 656 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.
- Processing aids not otherwise specified100
- Filler99
- Anti-caking agent54
- Pigment38
- Degradant/impurity (EPA)32
- No specific technical function31
- Viscosity modifier29
- Thickening agent26
54 other uses
- Defoamer17
- Absorbent16
- Abrasive15
- Binder15
- Monomers14
- Surface modifier11
- Adsorbent10
- Conductive agent9
- Anti-adhesive/cohesive9
- Flow promoter9
- Opacifer9
- Adhesion/cohesion promoter8
- Dispersing agent7
- Crystal growth modifiers (nucleating agents)6
- Wetting agent (non-aqueous)6
- Dye5
- Catalyst5
- Lubricating agent4
- Emulsifier4
- Antioxidant4
- Drier4
- Intermediate4
- Hardener4
- Soil amendments3
- Fragrance3
- Dehydrating agent (desiccant)3
- Surfactant (surface active agent)2
- Photosensitive agent2
- Anti-slip agent2
- Propellants, non-motive (blowing agents)2
- Fixing agent (mordant)2
- Insulators2
- Plating agent2
- Plasticizer2
- Chemical reaction regulator2
- Semiconductor and photovoltaic agent2
- Softener and conditioner2
- Fuel2
- Stabilizing agent2
- Anti-static agent2
- Solids separation (precipitating) agent, not other2
- Flavouring and nutrient1
- Corrosion inhibitor1
- pH regulating agent1
- Density modifier1
- Ion exchange agent1
- Bleaching agent1
- Etching agent1
- Flux agent1
- Dusting agent1
- Swelling agent1
- Waterproofing agent1
- Pharmaceutical disintegrant (EPA)1
- Humectant1
Source: US EPA CompTox dashboard
Irritation and sensitisation studies
7 skin studies and 9 eye studies are on record.
Classed as low10
The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.
See all 16 studies
- Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to - Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · other guideline: National standard protocol (No. IPC/05-92) corresponding to US EPA according to - Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to EPA OPPTS 870.2500 (Acute Dermal Irritation) according to - Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to - Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to other guideline: Patch-Test; Hazardous Substances, Part 191, Section 11, FDA, Washington, 1965 according to - Classification not possible
Skin Sensitization · Screening - Not classified
Skin Irritation · Screening - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · other guideline: Federal Hazardous Substance Act (1973) according to - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · other guideline: Draize-Test; Hazardous Substances, Part 191, Section 12, Federal Register, Vol. 37, No. 83, FDA, Washington 1972 according to - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to EPA OPPTS 870.2400 (Acute Eye Irritation) according to - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · no guideline available other guideline: Draize-Test equivalent or similar to - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · other guideline: Draize-Test; Hazardous Substances, Part 191, Section 12, Federal Register, Vol. 37, No. 83, FDA, Washington according to - Category 2
Eye Irritation · Screening - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) equivalent or similar to - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to EU Method B.5 (Acute Toxicity: Eye Irritation / Corrosion) according to - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to
Source: US EPA CompTox dashboard