Orthosilicic acid
[CAS# 10193-36-9]

Identification

• Name: Orthosilicic acid
• Synonyms: Silicon tetrahydroxide; Tetrahydroxysilane; Tetrahydroxysilicon
• Molecular Formula: H₄O₄Si
• Molecular Weight: 96.11
• CAS Registry Number: 10193-36-9 (62647-18-1)
• EC Number: 233-477-0

Properties

• Solubility: Freely soluble (164 g/L) (25 ºC), Calc.^*
• Density: 2.63 g/cm^3**
• Boiling point: 153-156 ºC (2 Torr)^***
• Refractive index: 1.421 (589.3 nm 20 ºC)^***

^* Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (©1994-2015 ACD/Labs)

^** Scavnicar, S.; Bulletin de la Societe Francaise de Mineralogie et de Cristallographie 1957, V80, P308-17.

^*** Liu, Sheng-Lieh; Journal of the Chinese Chemical Society (Taipei, Taiwan) 1962, VSer. II 8(384-7), P1961.

Safety Data

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Serious eye damage	Eye Dam.	1	H318
Specific target organ toxicity - single exposure	STOT SE	3	H335
Skin corrosion	Skin Corr.	1B	H314
Skin corrosion	Skin Corr.	1	H314