Octadecamethylcyclononasiloxane

Name: Octadecamethylcyclononasiloxane
Brand: Zemixal
SKU: ZX-031208

Reference StandardAvailable on request

Order Octadecamethylcyclononasiloxane (CAS 556-71-8) online at Zemixal. Request a quote with price, lead time and documents.

Pack sizes

Octadecamethylcyclononasiloxane chemical structure

CAS number556-71-8

FormulaC₁₈H₅₄O₉Si₉

Molar mass667.4 g/mol

Physical formSolid

HS code38229090

InChIKeyISXOGOLHEGHGQF-UHFFFAOYSA-N

IUPAC name2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16,18,18-octadecamethyl-1,3,5,7,9,11,13,15,17-nonaoxa-2,4,6,8,10,12,14,16,18-nonasilacyclooctadecane

About Octadecamethylcyclononasiloxane

Zemixal lists Octadecamethylcyclononasiloxane for laboratories that identify, quantify or control Decamethylcyclopentasiloxane and its related substances. For your records (Reference Standard), the material is defined by CAS 556-71-8, formula C18H54O9Si9 and molar mass 667.4 g/mol. It is handled as a solid.

Where it is used

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Storage and safety notes

It carries the GHS signal word Warning (H319), so wear gloves and eye protection and work with good ventilation.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and custom quantities are quoted on request. You receive a certificate of analysis with characterisation data with each order. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Decamethylcyclopentasiloxane

See every impurity, metabolite and related compound we list for this API.

Decamethylcyclopentasiloxane standards

Typical uses

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Applications

Pharmaceutical Manufacturing and QC Research Labs and Universities

Specifications and identifiers

Specifications of Octadecamethylcyclononasiloxane
Product name	Octadecamethylcyclononasiloxane
Catalogue number	ZX-031208
CAS number	556-71-8
IUPAC name	2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16,18,18-octadecamethyl-1,3,5,7,9,11,13,15,17-nonaoxa-2,4,6,8,10,12,14,16,18-nonasilacyclooctadecane
Molecular formula	C₁₈H₅₄O₉Si₉
Molar mass	667.4 g/mol
Exact mass	666.1691
Grade	Reference Standard
Physical form	Solid
H-bond donors / acceptors	0 / 9
Topological polar surface area	83.1 Å²
HS code	38229090
InChIKey	ISXOGOLHEGHGQF-UHFFFAOYSA-N
SMILES	C[Si]1(O[Si](O[Si](O[Si](O[Si](O[Si](O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)(C)C)(C)C)(C)C)(C)C)(C)C)C
PubChem CID	11172
Synonyms	Cyclononasiloxane, octadecamethyl-, Octadeamethyl-cyclononasiloxane, Octadecamethylnonasiloxane, 2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16,18,18-Octadecamethylcyclononasiloxane #

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

Irritant or harmful

Signal word Warning

H319Causes serious eye irritation

Precautionary statements P264 + P265, P280, P305 + P351 + P338, P337 + P317

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of Octadecamethylcyclononasiloxane
10 mg	Quoted on request
25 mg	Quoted on request
50 mg	Quoted on request
100 mg	Quoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about Octadecamethylcyclononasiloxane

Which CAS number identifies Octadecamethylcyclononasiloxane?

Octadecamethylcyclononasiloxane is registered under CAS 556-71-8. You may also see it listed as Cyclononasiloxane, octadecamethyl-, Octadeamethyl-cyclononasiloxane, Octadecamethylnonasiloxane. Our catalogue number for this item is ZX-031208.

What are the formula and molar mass of Octadecamethylcyclononasiloxane?

For Octadecamethylcyclononasiloxane, its formula is C18H54O9Si9 and its molar mass is 667.4 g/mol. The systematic (IUPAC) name is 2,2,4,4,6,6,8,8,10,10,12,12,14,14,16,16,18,18-octadecamethyl-1,3,5,7,9,11,13,15,17-nonaoxa-2,4,6,8,10,12,14,16,18-nonasilacyclooctadecane. InChIKey ISXOGOLHEGHGQF-UHFFFAOYSA-N lets you match it in any structure database.

How is Octadecamethylcyclononasiloxane used in pharmaceutical QC?

Octadecamethylcyclononasiloxane is a characterised reference material linked to Decamethylcyclopentasiloxane. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.

What grade and pack sizes are available for Octadecamethylcyclononasiloxane?

This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg. Larger quantities and custom packing can be quoted on request.

Which documents come with Octadecamethylcyclononasiloxane?

Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.

Can Zemixal ship Octadecamethylcyclononasiloxane to my country?

Yes. Because Octadecamethylcyclononasiloxane is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

More Decamethylcyclopentasiloxane standards

Have a list of compounds to price?

Paste up to 200 CAS numbers into Bulk CAS lookup, or send one enquiry for everything in your quote list. We reply with price, lead time and documents.

Bulk CAS lookup Open quote list