1,17-Dihydroxy octadecamethyl nonasiloxane

十八甲基-1,17-二氢氧基九硅氧烷

Also known as: Simethicone Impurity 23, 1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15,17,17-Octadecamethyl-1,17-nonasiloxanediol, bis[[[[[hydroxy(dimethyl)silyl]oxy-dimethylsilyl]oxy-dimethylsilyl]oxy-dimethylsilyl]oxy]-dimethylsilane, 1,17-Nonasiloxanediol, 1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15,17,17-octadecamethyl-

1,17-Dihydroxy octadecamethyl nonasiloxane (CAS 18678-58-5) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C18H56O10Si9 and a molecular weight of 685.40100 g/mol. It is also known as Simethicone Impurity 23, 1,1,3,3,5,5,7,7,9,9,11,11,13,13,15,15,17,17-Octadecamethyl-1,17-nonasiloxanediol and bis[[[[[hydroxy(dimethyl)silyl]oxy-dimethylsilyl]oxy-dimethylsilyl]oxy-dimethylsilyl]oxy]-dimethylsilane. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 18678-58-5
Jingsj CID: J-1166794-4
Molecular Formula: C₁₈H₅₆O₁₀Si₉
Chinese Name: 十八甲基-1,17-二氢氧基九硅氧烷
Molecular Weight: 685.40100 g/mol
Category: Aliphatic Hydrocarbons
Last updated: 8/21/2026

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Frequently Asked Questions

What is the CAS number of 1,17-Dihydroxy octadecamethyl nonasiloxane?

The CAS number of 1,17-Dihydroxy octadecamethyl nonasiloxane is 18678-58-5.

What are the molecular formula and molecular weight of 1,17-Dihydroxy octadecamethyl nonasiloxane?

1,17-Dihydroxy octadecamethyl nonasiloxane has molecular formula C18H56O10Si9 and molecular weight 685.40100 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "1,17-Dihydroxy octadecamethyl nonasiloxane (CAS 18678-58-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1166794-4 (accessed 2026-10-26).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.