八甲基环四硅氧烷

Name: 八甲基环四硅氧烷
Brand: 济南圣和化工有限公司

CAS 556-67-2C8H24O4Si4MW 296.61

八甲基环四硅氧烷（CAS 556-67-2）属有机化学品类产品，分子式 C8H24O4Si4，分子量 296.61。济南圣和化工有限公司常年现货供应该产品，常规纯度按批次COA提供(不公开发布)，可按客户需求安排分装包装，欢迎邮件或来电询价。

产品概览

CAS号	556-67-2
分子式	C8H24O4Si4
分子量	296.61
熔点	17.5 °C
沸点	175 °C
纯度	按批次COA提供(不公开发布)
包装	按订单/批次确认(不公开发布)
应用领域	有机化学品
类别	有机化学品

应用领域

有机化学品

该产品的下游应用集中在有机化学品。不同客户工艺差异较大，我们支持按需提供样品与小批量试用。

包装与储存

包装规格按订单/批次确认(不公开发布)

纯度规格按批次COA提供(不公开发布)

储存条件密封、阴凉干燥处保存

运输常规化工运输

样品可协商提供

交期现货/按订单安排

采购提示：本产品按按订单/批次确认(不公开发布)起订发货，收到货物后请先核对包装完好性再行入库。储存条件为阴凉干燥、密封保存；如需 MSDS 或运输说明，可在询价时一并索取。

质量与文件

每批产品随货提供 COA（分析证书）；可按需提供 MSDS/技术数据表及第三方检测报告。纯度与包装以批次 COA 及订单确认为准。

关于供应商

济南圣和化工有限公司位于山东济南，主营化工原料供应，精选产品齐全，覆盖有机化学品、无机化学品、食品添加剂、医药中间体等多个大类。我们随货提供 COA 分析证书，一个工作日内回复报价，欢迎国内外采购方长期合作。

常见问题

八甲基环四硅氧烷的 CAS 号是多少？

八甲基环四硅氧烷的 CAS 号为 556-67-2。

该产品的纯度和包装规格是什么？

常规纯度规格为按批次COA提供(不公开发布)，包装为按订单/批次确认(不公开发布)，随货提供 COA。

八甲基环四硅氧烷有什么用途？

主要应用于有机化学品。

如何购买或获取报价？

请发送邮件至 info@591daili.com 或通过 WhatsApp 联系，注明产品名称、CAS 号与需求数量，一个工作日内回复报价。供应商：济南圣和化工有限公司。

PubChem 公开数据

Description

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].

Identification

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

Computed Descriptors

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

Physical & Chemical Properties

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

Physical description & handling notes

CBI; Liquid; Liquid; Other Solid
Colorless liquid; mp = 17.5 deg C; [ICSC]
COLOURLESS OILY LIQUID.
Oily liquid
Smooth, viscous liquid
In synthetic seawater water, 0.033 mg/L at 25 °C

Regulatory Status

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 Hazard Classification

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]

Documented Uses

Used to make methyl silicon oils, silicone fluids, and elastomers; Also used in a variety of applications including fermentation processes, instant coffee production, paper coatings and sizing, diet soft drinks, waste yeast tanks, food washing solutions, adhesives, textiles, de-asphalting, boiler treatments, detergents, cleaning solutions, surfactants, cosmetic products, and polishes; [HSDB]
Pulp and Paper Processing [Category: Industry]
Textiles (Fiber & Fabric Manufacturing) [Category: Industry]
Working with Glues and Adhesives [Category: Other]
Preparation of methyl silicon oils.
Field of application: Fuel additives; cleaning/washing agents; impregnation materials; adhesives; binding agents; surface treatment; construction materials; paints; lacquers and varnishes; fillers; reprographic agents; process regulators; anti-set-off; anti adhesive agents. /From table/

Synonyms

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

Frequently Asked Questions

What are the CAS number and molecular formula of Octamethyl cyclotetrasiloxane?

CAS 556-67-2; molecular formula C8H24O4Si4; molecular weight — g/mol.

What other names is Octamethyl cyclotetrasiloxane known by?

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.

What is the regulatory status of Octamethyl cyclotetrasiloxane?

Documented regulatory listings: FDA Cumulative Estimated Daily Intake (CEDI): FCS; OCTAMETHYLCYCLOTETRASILOXANE (D4); CIR / INCI: Cosmetics ingredient -> Conditioning/Emollient; Moisturizing/Humectant.

Is Octamethyl cyclotetrasiloxane classified as hazardous?

0.1% of GHS notifications report no hazard classification (2 of 4700).

What are the key physical properties of Octamethyl cyclotetrasiloxane?

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.