8.14051

Hexamethyldisiloxane

for synthesis

• Synonyme(s) : Hexamethyldisiloxane, 2,2,4,4-Tetramethyl-3-oxa-2,4-disilapentane, HMDSO
• Formule linéaire : ((CH₃)₃Si)₂O
• Numéro CAS: 107-46-0
• Poids moléculaire : 162.38
• Numéro MDL: MFCD00008265
• Code UNSPSC : 12352103
• Numéro de classement CE : 203-492-7
• Nomenclature NACRES : NA.22

Propriétés

• Pression de vapeur: 20 hPa ( 20 °C)
• Niveau de qualité: 200
• Pureté: ≥98.5% (GC)
• Forme: liquid
• Température d'inflammation spontanée: 340 °C
• Puissance: >12160 mg/kg LD₅₀, oral (Rat); >2000 mg/kg LD₅₀, skin (Rat)
• Limite d'explosivité: 0.5-21.8 % (v/v)
• Point d'ébullition: 100 °C/1013 hPa
• Pf: -68 °C
• Température de transition: flash point 4 °C
• Solubilité: insoluble 0.00037 g/L
• Densité: 0.76 g/cm³ at 25 °C
• Température de stockage: 2-30°C
• InChI: 1S/C6H18OSi2/c1-8(2,3)7-9(4,5)6/h1-6H3
• Clé InChI: UQEAIHBTYFGYIE-UHFFFAOYSA-N

Description

Application

• Hexamethyldisiloxane coating by plasma to create a superhydrophobic surface for fabric masks: Research into the application of HMDSO plasma coatings to fabric masks to impart superhydrophobic properties, enhancing their resistance to moisture (Prado et al., 2022).
• PECVD of hexamethyldisiloxane coatings using extremely asymmetric capacitive RF discharge: Examines the deposition of HMDSO-based coatings via plasma-enhanced chemical vapor deposition, focusing on the influence of discharge asymmetry on the coating properties (Gosar et al., 2020).
• A ReaxFF-based molecular dynamics study of the pyrolysis mechanism of hexamethyldisiloxane: This study uses molecular dynamics to explore the pyrolysis processes of HMDSO, important for understanding its stability and decomposition under thermal stress (Chen et al., 2022).
• Thermal stability of hexamethyldisiloxane and octamethyltrisiloxane: Discusses the thermal stability of HMDSO compared to related siloxanes, providing valuable data for applications involving heat exposure (Keulen et al., 2018).

Remarque sur l'analyse

Assay (GC, area%): ≥ 98.5 % (a/a)
Density (d 20 °C/ 4 °C): 0.762 - 0.764
Identity (IR): passes test

Informations sur la sécurité

• Pictogrammes: GHS02,GHS09
• Mention d'avertissement: Danger
• Mentions de danger: H225 - H410
• Conseils de prudence: P210 - P233 - P240 - P241 - P242 - P273
• Classification des risques: Aquatic Acute 1 - Aquatic Chronic 1 - Flam. Liq. 2
• Code de la classe de stockage: 3 - Flammable liquids
• Classe de danger pour l'eau (WGK): WGK 2
• Point d'éclair (°F): 21.2 °F - closed cup
• Point d'éclair (°C): -6 °C - closed cup