Octamethyl cyclotetrasiloxane (CAS No. 556-67-2) is supplied by Jinan Shenghe Chemical Co., Ltd. with a typical purity of 按批次COA提供(不公开发布). Main applications include Organic Chemicals. Bulk quantities are available with COA; purity and packaging are subject to batch COA and order confirmation.
Organic Chemicals
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The CAS number of Octamethyl cyclotetrasiloxane is 556-67-2.
Typical purity is 按批次COA提供(不公开发布), supplied in 按订单/批次确认(不公开发布), with COA provided.
Main applications include Organic Chemicals.
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Octamethyl cyclotetrasiloxane · CAS 556-67-2 · C8H24O4Si4. UNII CZ227117JE. Boiling Point: 175 °C; Boiling Point: BP: 74 °C at 20 mm Hg; Boiling Point: 175 °C @760 [mm Hg].
| CAS Registry Number | 556-67-2 |
|---|---|
| PubChem CID | 11169 |
| Molecular formula | C8H24O4Si4 |
| IUPAC name | 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane |
| UNII (FDA) | CZ227117JE |
| Molecular Weight | 296.61 |
|---|---|
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 0 |
| Exact Mass | 296.07516538 |
| Monoisotopic Mass | 296.07516538 |
| Topological Polar Surface Area | 36.9 |
| Heavy Atom Count | 16 |
| Formal Charge | 0 |
| Complexity | 197 |
| Boiling Point | 175 °C |
|---|---|
| Boiling Point | BP: 74 °C at 20 mm Hg |
| Boiling Point | 175 °C @760 [mm Hg] |
| Melting Point | 17.5 °C |
| Flash Point | 55 °C (131 °F) - closed cup |
| Flash Point | 56 °C |
| Solubility | In water, 0.056 mg/L at 23 °C |
| Density | 0.9558 @25 °C |
| Vapor Pressure | 1.05 [mmHg] |
| Vapor Pressure | 1.05 mm Hg at 25 °C |
| Regulatory & Food Contact | FDA Cumulative Estimated Daily Intake (CEDI): FCS OCTAMETHYLCYCLOTETRASILOXANE (D4) CIR / INCI: Cosmetics ingredient -> Conditioning/Emollient; Moisturizing/Humectant CIR / INCI: Solvent; Emollient; Viscosity controlling; Antistatic; Humectant; Hair conditioning |
|---|---|
| GHS notification summary | 0.1% (2 / 4700) |
| GHS notification summary | 0.1% (2 / 4700) |
|---|---|
| Reported hazard statements | H410, H226 (72.1%), H361 (96%), H413 (89.7%) |
H361f ***: Suspected of damaging fertility [Warning Reproductive toxicity]
H410: Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]
OCTAMETHYLCYCLOTETRASILOXANE; 556-67-2; Cyclotetrasiloxane, octamethyl-; 2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane; Oktamethylcyklotetrasiloxan; OMCTS; Cyclic dimethylsiloxane tetramer; Cyclomethicone 4; NUC silicone VS 7207; Union carbide 7207; Silicone SF 1173; DTXSID7027205; KF 994; SF 1173; UC 7207; VS 7207
CAS 556-67-2; molecular formula C8H24O4Si4; molecular weight — g/mol.
OCTAMETHYLCYCLOTETRASILOXANE, 556-67-2, Cyclotetrasiloxane, octamethyl-, 2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane, Oktamethylcyklotetrasiloxan, OMCTS.
Documented regulatory listings: FDA Cumulative Estimated Daily Intake (CEDI): FCS; OCTAMETHYLCYCLOTETRASILOXANE (D4); CIR / INCI: Cosmetics ingredient -> Conditioning/Emollient; Moisturizing/Humectant.
0.1% of GHS notifications report no hazard classification (2 of 4700).
Boiling Point: 175 °C; Boiling Point: BP: 74 °C at 20 mm Hg; Boiling Point: 175 °C @760 [mm Hg]; Melting Point: 17.5 °C.
Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.
Supplier: Jinan Shenghe Chemical Co., Ltd. · Reply within one business day.