けい酸
Orthosilicic acid
基本情報
- CAS
10193-36-9- 標準SMILES
O[Si](O)(O)O- InChIKey
RMAQACBXLXPBSY-UHFFFAOYSA-N- 分子式
- H4O4Si
- 平均分子量
- 96.11 g/mol
- 単同位体質量
- 95.98788514
概要
Silicic acid is a silicon oxoacid. It is a conjugate acid of a trihydrogensilicate(1-).
名称と識別子
- 優先名称
- Orthosilicic acid
- IUPAC
- silicic acid
- 現地名
- けい酸
- 英語名
- tetrahydroxysilane
- 分子式
- H4O4Si
- 分子量
- 96.11
名称と別名
Orthosilicic acidMonosilicic acidSilicon tetrahydroxideSilicasolTetrahydroxysiliconsilanetetrolKieselsaeureSilicic acid (Si(OH)4)Silicic acid (ortho)OrthokieselsaeureEINECS 233-477-0UNII-623B93YABH
名称をさらに表示
テトラヒドロキシシランシランテトラオールけい素テトラヒドロキシドテトラヒドロキシけい素オルトけい酸けい酸silicicacisiliclc acidMONOSILICICACIDtetrahydroxysilane
tetrahydroxidosilicon623B93YABHH4SiO4Silicon hydroxide (Si(OH)4)CHEBI:26675ORTHOSILICIC ACID (H4SIO4)(Si(OH)4)[Si(OH)4]
データベース識別子
- 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
物性
構造計算による物性
- 極性表面積
- 80.9 Ų
- 水素結合供与体数
- 4
- 水素結合受容体数
- 4
- 回転可能結合数
- 0
- 重原子数
- 5
- 形式電荷
- 0
- 複雑度
- 19.1
実験および物理化学的性質
Chemical ClassesMineral Dusts -> Other Mineral Dusts
CosmeticsBulking; Opacifying; Anticaking; Viscosity controlling; 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]
物理化学的性質
- 沸点
- 153 · 153-156 °C(Press: 2 Torr)
- 比重(密度)
- 2.63 g/cm3 · 2.63 g/cm3
- 蒸気圧
- 1.333 hPa · 1.333hPa at 25℃
- 酸解離定数(Pka)
- 12.39 · 12.39±0.53(Predicted)
- 外見
- 溶液中にのみ存在する
- 色
- exists only in solution
- 水溶解度
- 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℃
- EPAの化学物質情報
- Silicic acid (H4SiO4) (10193-36-9)
安全と法規制
安全情報は参考情報です。供給元の安全データシート（SDS）、適用法令、専門家による評価に代わるものではありません。
GHS分類
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]
危険有害性情報
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)
REACH registered substance: Tetrahydroxysilane (EC: 233-477-0)
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
安全と保護具
Protective Action Criteria (PAC)
18 [mg/m3]
200 [mg/m3]
1200 [mg/m3]
毒性情報
Adverse EffectsFibrogenic - Inducing tissue injury and fibrosis (scarring).
安全データ
- tsca
- TSCA listed
化学と産業
用途と製造
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 -> Bulking; Opacifying; Anticaking; Viscosity controlling; Abrasive; Absorbent
General Manufacturing Information
Paint and Coating Manufacturing
Silicic acid: ACTIVE
Silicic acid (H4SiO4): ACTIVE
応用分野
解説ケイ酸狭義では，オルトケイ酸H4SiO4をさすが，一般には組成がnSiO2･mH2Oで示される物質をさす．代表的なものは，オルトケイ酸H4SiO4と，メタケイ酸 (H2Si2O3)n である．二ケイ酸H2Si2O5のようなオリゴマーも確認されている．そのほか，分子がきわめて大きいシリカゲルやオパールがある．また，水ガラスなどの水溶液に酸を加えて生じる組成不定のゲル状の物質も一種の高分子のケイ酸である．森北出版「化学辞典（第2版）
上流・下流製品情報
上流原料
下流製品
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