444278

Decamethylcyclopentasiloxane

97%

• Synonym(s): 2,2,4,4,6,6,8,8,10,10-Decamethylcyclopentasiloxane, Cyclic dimethylsiloxane pentamer, Cyclo-decamethylpentasiloxane, Cyclomethicone pentamer 245, Decamethylpentacyclosiloxane
• Empirical Formula (Hill Notation): C₁₀H₃₀O₅Si₅
• CAS Number: 541-02-6
• Molecular Weight: 370.77
• Beilstein: 1800166
• EC Number: 208-764-9
• MDL number: MFCD00046966
• UNSPSC Code: 12352103
• PubChem Substance ID: 24868110
• NACRES: NA.22

Properties

• Assay: 97%
• form: liquid
• refractive index: n20/D 1.396 (lit.)
• bp: 90 °C/10 mmHg (lit.)
• density: 0.958 g/mL at 25 °C (lit.)
• SMILES string: C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1
• InChI: 1S/C10H30O5Si5/c1-16(2)11-17(3,4)13-19(7,8)15-20(9,10)14-18(5,6)12-16/h1-10H3
• InChI key: XMSXQFUHVRWGNA-UHFFFAOYSA-N

Description

General description

Decamethylcyclopentasiloxane (D₅) is used in personal care products including skin creams, cosmetics, shampoos, deodorants and conditioners. D₅ is also used in various applications such as industrial cleaning fluids and dry cleaning solvents.

Application

Decamethylcyclopentasiloxane (D₅) can be used as:

• A greener solvent in synthetic chemistry applications.
• A monomeric unit for polymerization by various base catalysts to obtain polysiloxane polymer.

Safety Information

• Storage Class Code: 10 - Combustible liquids
• WGK: WGK 2
• Flash Point(F): 163.4 °F - closed cup
• Flash Point(C): 73 °C - closed cup
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves