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Octamethylcyclotetrasiloxane, 98% Product Code.: 11412288
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Octamethylcyclotetrasiloxane, 98%

Product Code. p-7022452
100 g, 100g
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500 g
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500g
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Product Code. 11412288

Brand: Thermo Scientific Alfa Aesar A15240.22

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Description

CAS: 556-67-2 | C8H24O4Si4 | 296.616 g/mol

Octamethylcyclotetrasiloxane is used to prepare silicone oil, silicone rubber and silicone resin having different degrees of polymerization through ring opening and polymerizing. It is also widely used in various fields viz. construction, electronics, textile, automobile, personal care, food, and machining. It is an organometallic reagent utilized for the preparation of siloxane polymers having high surface-hydrophobicity restoration.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
Octamethylcyclotetrasiloxane is used to prepare silicone oil, silicone rubber and silicone resin having different degrees of polymerization through ring opening and polymerizing. It is also widely used in various fields viz. construction, electronics, textile, automobile, personal care, food, and machining. It is an organometallic reagent utilized for the preparation of siloxane polymers having high surface-hydrophobicity restoration.

Solubility
Immiscible with water.

Notes
Incompatible with strong oxidizing agents, acids and bases.
TRUSTED_SUSTAINABILITY

Chemical Identifiers

CAS 556-67-2
Molecular Formula C8H24O4Si4
Molecular Weight (g/mol) 296.616
MDL Number MFCD00003269
InChI Key HMMGMWAXVFQUOA-UHFFFAOYSA-N
Synonym octamethylcyclotetrasiloxane, cyclotetrasiloxane, octamethyl, oktamethylcyklotetrasiloxan, cyclic dimethylsiloxane tetramer, omcts, nuc silicone vs 7207, union carbide 7207, silicone sf 1173, oktamethylzyklotetrasiloxan, unii-cz227117je
PubChem CID 11169
ChEBI CHEBI:25640
IUPAC Name 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane
SMILES C[Si]1(O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)C

Specifications

Boiling Point 175°C to 176°C
Melting Point 17°C to 18°C
Quantity 100 g
UN Number UN1993
Beilstein 1787074
Flash Point 56°C (132°F)
Merck Index 14,6747
Solubility Information Immiscible with water.
Formula Weight 296.62
Percent Purity 98%
Refractive Index 1.396
Sensitivity Moisture sensitive
Density 0.956
Chemical Name or Material Octamethylcyclotetrasiloxane
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Lot Number Certificate Type Date Product Code
Lot Number10255269 Certificate TypeCertificate of Analysis Date29/05/2025 Product CodeA15240.36,A15240.22
Lot Number62500200 Certificate TypeCertificate of Analysis Date17/05/2025 Product CodeA15240.36,A15240.22
Lot NumberR02I061 Certificate TypeCertificate of Analysis Date20/02/2024 Product CodeA15240.36,A15240.22
Lot Number10248183 Certificate TypeCertificate of Analysis Date02/10/2023 Product CodeA15240.36,A15240.22
Lot Number10246721 Certificate TypeCertificate of Analysis Date23/05/2023 Product CodeA15240.22

Safety and Handling

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Signal Word
  • Warning
 Hazard Category
  • LONG-TERM AQUATIC HAZARD Chronic 1
  • Flammable liquid Category 3
  • Reproductive toxicity Category 2
 Hazard Statement
  • H226-Flammable liquid and vapour.
  • H361f-Suspected of damaging fertility.
  • H410-Very toxic to aquatic life with long lasting effects.
 Precautionary Statement
  • P201-Obtain special instructions before use.
  • P210-Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P280-Wear protective gloves/protective clothing/eye protection/face protection.
  • P303+P361+P353-IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/ shower.
  • P308+P313-IF exposed or concerned: Get medical advice/attention.
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RUO – Research Use Only

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