Basic information
- CAS
10193-36-9- Standard SMILES
O[Si](O)(O)O- InChIKey
RMAQACBXLXPBSY-UHFFFAOYSA-N- Molecular formula
- H4O4Si
- Average molar mass
- 96.11 g/mol
- Monoisotopic mass
- 95.98788514
Overview
Silicic acid is a silicon oxoacid. It is a conjugate acid of a trihydrogensilicate(1-).
Names & identifiers
- Preferred name
- Orthosilicic acid
- IUPAC
- silicic acid
- English name
- tetrahydroxysilane
- Molecular formula
- H4O4Si
- Molecular weight
- 96.11
Names & synonyms
SILICIC ACIDOrthosilicic acidMonosilicic acidSilicon tetrahydroxideSilicasolTetrahydroxysiliconSilicic acid (Si(OH)4)Silicic acid (ortho)silanetetrolKieselsaeureOrthokieselsaeureEINECS 233-477-0
Show more names
silicicacisiliclc acidMONOSILICICACIDtetrahydroxysilane
UNII-623B93YABHtetrahydroxidosilicon623B93YABHH4SiO4Silicon hydroxide (Si(OH)4)CHEBI:26675ORTHOSILICIC ACID (H4SIO4)(Si(OH)4)
Database identifiers
- CAS
10193-36-9、1343-98-2- PubChem CID
- 14942
- DTXSID
DTXSID5058721- ChEBI
CHEBI:26675- UNII
- 623B93YABH
- EC Number
- 215-683-2、233-477-0
- Nikkaji
- J148.210F
Properties
Computed structural properties
- Topological polar surface area
- 80.9 Ų
- Hydrogen bond donors
- 4
- Hydrogen bond acceptors
- 4
- Rotatable bonds
- 0
- Heavy atoms
- 5
- Formal charge
- 0
- Complexity
- 19.1
Experimental & physicochemical properties
Chemical ClassesMineral Dusts -> Other Mineral Dusts
CosmeticsViscosity controlling; Anticaking; Bulking; Opacifying; Abrasive; Absorbent
Density2.2 @25 °C
Melting Point1610 °C
Vapor Pressure10 [mm Hg] @1732 °C
Food Contact SubstancesFCS -> FDA Inventory of Food Contact Substances Listed in 21 CFR
Physical Description
Dry Powder
White solid; [Merck Index] Powder; [Sigma-Aldrich MSDS]
Physicochemical properties
- Boiling point
- 153 · 153-156 °C(Press: 2 Torr)
- Density
- 2.63 g/cm3 · 2.63 g/cm3
- vapor pressure
- 1.333 hPa · 1.333hPa at 25℃
- pka
- 12.39 · 12.39±0.53(Predicted)
- form
- exists only in solution
- color
- exists only in solution
- Water Solubility
- 100 ng/L · 100ng/L at 25℃
- Henry's Law Constant
- 2.3 · 2.3×1010 mol/(m3Pa) at 25℃, Plyasunov (2012)
- LogP
- -1 at · -1 at 25℃
- FDA UNII
- 623 B93YABH · 623B93YABH
- EPA Substance Registry System
- Silicic acid (H4SiO4) (10193-36-9)
- Symbol(GHS)
- 5 · GHS05
- Signal word
- Danger
- Hazard statements
- 314 · H314
- Precautionary statements
- 260 · P260-P264-P280-P301+P330+P331-P303+P361+P353-P363-P304+P340-P310-P321-P305+P351+P338-P405-P501
- TSCA
- TSCA listed
- REACH Registrations
- Active
Safety & regulation
GHS classification
GHS Classification
This chemical does not meet GHS hazard criteria for 100% (168 of 168) of all reports.
Not Classified
Aggregated GHS information provided per 168 reports by companies from 1 notifications to the ECHA C&L Inventory.
This chemical does not meet GHS hazard criteria for 0.7% (1 of 135) of reports.
Danger
H314 (99.3%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
Hazard information
Regulatory Information
Chemical: Silicic acid (H4SiO4)
Chemical: Silicic acid
Silicic acid is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Silicic acid are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)
Status: Active Update: 08-07-2021 https://echa.europa.eu/registration-dossier/-/registered-dossier/32043
Silicic acid (H4SiO4): Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.
Silicic acid: Does not have an individual approval but may be used under an appropriate group standard
Hazards SummaryCauses lung changes including focal fibrosis in intermittent inhalation studies of rats; [RTECS] A skin and strong eye irritant; Targets the lungs; [Sigma-Aldrich MSDS]
Hazard Classes and Categories
Skin Corr. 1 (99.3%)
Not Classified
Safety & protection
Protective Action Criteria (PAC)
18 [mg/m3]
200 [mg/m3]
1200 [mg/m3]
Toxicology
Adverse EffectsFibrogenic - Inducing tissue injury and fibrosis (scarring).
Safety data
- tsca
- TSCA listed
- Signal word
- Danger
- Symbol(GHS)
- GHS05
- Hazard statements
- H314
- REACH Registrations
- Active
- Precautionary statements
- P260-P264-P280-P301+P330+P331-P303+P361+P353-P363-P304+P340-P310-P321-P305+P351+P338-P405-P501
Chemistry & industry
Uses & manufacturing
Uses
Opal is the natural form; Used as a sorbent for column chromatography; Approximate molecular formula of H2-Si-O3; [Merck Index] A hydrated form of silicon dioxide. It is commonly used in the manufacture of TOOTHPASTES and as a stationary phase for CHROMATOGRAPHY. [ChemIDplus] Gel forms are used to absorb vapors and as insecticide carriers; [REPROTOX] Permitted for use as an inert ingredient in non-food pesticide products; [EPA]
U.S. Production2023: 50,000 - <250,000 lb
Industry UsesSolvent
Household ProductsInformation on 9 consumer products that contain Silicic acid in the following categories is provided:
Use ClassificationCosmetics -> Viscosity controlling; Anticaking; Bulking; Opacifying; Abrasive; Absorbent
General Manufacturing Information
Paint and Coating Manufacturing
Silicic acid: ACTIVE
Silicic acid (H4SiO4): ACTIVE
Upstream & downstream products
Upstream raw materials
Downstream products
Suppliers7 total
成都健腾生物技术有限公司028-85159085 · [email protected]
杭州摩库生物医药科技有限公司+86-057181025280; +8617767106207 · [email protected]
陕西缔都新材料有限公司029-63373950 17392216152 · [email protected]
淄博容纳生物科技有限公司+86-86-13583358881 +8618560316533 · [email protected]
池州凯隆进出口贸易有限公司[email protected]
河南天孚化工有限公司+86-0371-55170693 +86-19937530512 · [email protected]
DAYANG CHEM (HANGZHOU) CO.,LTD+86-88938639 +86-17705817739 · [email protected]
Additional notes
DefinitionChEBI: Silicic acid is a silicon oxoacid. It is a conjugate acid of a trihydrogensilicate(1-).
Related reactions
51 records
Compound notes
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