Basic information
- Standard SMILES
O=[Si](O)O- InChIKey
IJKVHSBPTUYDLN-UHFFFAOYSA-N- Molecular formula
- H2O3Si
- Average molar mass
- 78.099 g/mol
- Monoisotopic mass
- 77.97732045
Overview
See also: Silicate (annotation moved to).
Names & identifiers
- Preferred name
- Metasilicic acid
- IUPAC
- dihydroxy(oxo)silane
- English name
- Silicic acid
- Molecular formula
- H2O3Si
- Molecular weight
- 78.1
Names & synonyms
Show more names
Database identifiers
- CAS
1343-98-2、7699-41-4- PubChem CID
- 14768
- DTXSID
DTXSID30872499- UNII
- 4OI8D3YOH1
- EC Number
- 231-716-3
- Nikkaji
- J215.993G
Properties
Computed structural properties
- Topological polar surface area
- 57.5 Ų
- Hydrogen bond donors
- 2
- Hydrogen bond acceptors
- 3
- Rotatable bonds
- 0
- Heavy atoms
- 4
- Formal charge
- 0
- Complexity
- 26.3
Physicochemical properties
- Melting point
- 1704 ℃ · 1704℃
- solubility
- 2 O; · insoluble in H2O; soluble in HF
- form
- powder
- color
- White
- PH
- 1 · pKa1= 9.65, pKa2 = 13.09(25℃)
- Dielectric constant
- 2 · 2.0(Ambient)
- InChI
- 1S/H2O3Si/c1-4(2)3/h1-2H
- InChIKey
- IJKVHSBPTUYDLN-UHFFFAOYSA-N
- SMILES
- O[Si](O)=O
- CAS DataBase Reference
- 7699 · 7699-41-4(CAS DataBase Reference)
- EWG's Food Scores
- 1 · 1
- FDA UNII
- 4 OI8D3YOH1 · 4OI8D3YOH1
- EPA Substance Registry System
- Silicic acid (H2SiO3) (7699-41-4)
- Cosmetics Info
- Hydrated Silica
- UNSPSC Code
- 23201100 · 23201100
- NACRES
- 54 · SB.54
- Symbol(GHS)
- 7 · GHS07
- Signal word
- Warning
- Hazard statements
- 319 · H319-H335
- Precautionary statements
- 261 · P261-P264-P271-P280-P304+P340+P312-P305+P351+P338
- target organs
- Respiratory system
- PPE
- 95 · dust mask type N95 (US), Eyeshields, Gloves
- Hazard Codes
- Xi
- Risk Statements
- 36 · 36/37
- Safety Statements
- 22 · 22-26-36
- OEB
- B
- OEL
- 6 mg/m3 · TWA: 6.0 mg/m3
- WGK Germany
- 3 · 3
- RTECS
- 8853000 · VV8853000
- TSCA
- TSCA listed
- Storage Class
- 11 · 11 - Combustible Solids
- Hazard Classifications
- 2 STOT · Eye Irrit. 2STOT SE 3
Safety & regulation
GHS classification
GHS Classification
This chemical does not meet GHS hazard criteria for 4.8% (5 of 105) of reports.
Warning
H319 (90.5%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
P261, P264+P265, P271, P280, P304+P340, P305+P351+P338, P319, P337+P317, P403+P233, P405, and P501 (click each P-code to see the statement)
Aggregated GHS information provided per 105 reports by companies from 7 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard information
Regulatory Information
Chemical: Silicic acid (H2SiO3)
Silicic acid (H2SiO3): 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.
Safety data
- OEB
- B
- OEL
- TWA: 6.0 mg/m3
- PPE
- dust mask type N95 (US), Eyeshields, Gloves
- wgk
- 3
- tsca
- TSCA listed
- rtecs
- VV8853000
- risk_code
- 36/37
- Signal word
- Warning
- Symbol(GHS)
- GHS07
- hazard_code
- Xi
- safety_code
- 22-26-36
- Storage Class
- 11 - Combustible Solids
- target organs
- Respiratory system
- Hazard statements
- H319-H335
- Hazard Classifications
- Eye Irrit. 2STOT SE 3
- Precautionary statements
- P261-P264-P271-P280-P304+P340+P312-P305+P351+P338
Chemistry & industry
Uses & manufacturing
Applications
DescriptionSilicic acid is the general name that refers to the group of chemical compounds of the element hydrogen, silicon, and oxygen with the formula [SiOx(OH)4-2x]n. H4SiO4 is the most predominant form. Silicic acid is a hydrated form of silicon dioxide. It belongs to the family of Miscellaneous Silicates. These are inorganic compounds in which the largest metallic oxoanion is silicate, to which either no atom or a non metal atom is bonded. Silicic acid is contained in many foods, such as grain, fruit and vegetables (borage). It is commonly used in the manufacture of toothpastes and as a stationary phase for chromatography.It is utilized for the manufacture catalyst and catalyst carrier. It is involved in tungsten filament production as chemical reagent and flux. Further, it is used for oil and wax decoloring.
UsesLaboratory reagent and reinforcing agent in rubber.
UsesSilicic acid is used in protein chromatography. Silicic acid has been used in a study to demonstrate the anti-biofilm potential of a glycolipid surfactant produced by a tropical marine strain of Serratia marcescens. Silicic acid has also been used to study the antioxidant activity of fresh and processed Jalapeno and Serrano peppers.
Upstream & downstream products
Upstream raw materials
Downstream products
Suppliers50 total
Additional notes
DefinitionThe jellylike precipitate obtained when sodium silicate solution is acidified. The proportion of water varies with the conditions of preparation and decreases gradually during drying and ignition, until relatively pure silica remains. During drying the je
Related reactions
Linked notes
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