Hexamethylcyclotrisiloxane - ≥98%(GC) , CAS No.541-05-9

CAS: 541-05-9 Cat. No.: H156955 Molecular Weight: 222.46 Beilstein Registry Number: 4(4)4123 EC Number: 208-765-4
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GRADE & PURITY ≥98%(GC)
Synonyms
EPV75L8O0R | SCHEMBL29235 | CAS-541-05-9 | Dimethylsiloxane cyclic trimer | NCGC00164098-01 | H11267 | AKOS008901190 | SDK 10 | Hexamethylcyclotrisiloxane, analytical standard | LS 8120 | Q26840948 | DTXSID501337639 | HEXAMETHYLCYCLOTRISILOXANE | 2-(boc-a
Storage
Room temperature
Shipped In
Normal
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Size
Status
Price
Qty
5g
H156955-5g
2
$9.90
25g
H156955-25g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$18.90
100g
H156955-100g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$49.90
500g
H156955-500g
8-12 wks(?) Production requires sourcing of materials. We appreciate your patience and understanding.
$179.90
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Why this grade

≥98%(GC) for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Room temperature Ships Normal Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 11 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
EPV75L8O0R | SCHEMBL29235 | CAS-541-05-9 | Dimethylsiloxane cyclic trimer | NCGC00164098-01 | H11267 | AKOS008901190 | SDK 10 | Hexamethylcyclotrisiloxane, analytical standard | LS 8120 | Q26840948 | DTXSID501337639 | HEXAMETHYLCYCLOTRISILOXANE | 2-(boc-a
Specifications & Purity
≥98%(GC)
Storage
Room temperature
Shipped In
Normal
Purity
≥98%(GC)
Names and Identifiers
Pubchem Sid504752028
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/504752028
Canonical SmilesC[Si]1(O[Si](O[Si](O1)(C)C)(C)C)C
IUPAC Name2,2,4,4,6,6-hexamethyl-1,3,5,2,4,6-trioxatrisilinane
InChIKeyHTDJPCNNEPUOOQ-UHFFFAOYSA-N
INCHI1S/C6H18O3Si3/c1-10(2)7-11(3,4)9-12(5,6)8-10/h1-6H3
Isomeric SMILES C[Si]1(O[Si](O[Si](O1)(C)C)(C)C)C
WGK Germany 3
Molecular Weight 222.46
Beilstein 4(4)4123
Reaxy-Rn 1766829
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=1766829&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganometallic compounds
ClassOrganometalloid compounds
SubclassOrganosilicon compounds
Intermediate Tree Nodes Not available
Direct ParentOrganoheterosilanes
Alternative Parents Organic metalloid salts  Organic oxygen compounds  Hydrocarbon derivatives  
Molecular FrameworkAliphatic heteromonocyclic compounds
Substituents Organoheterosilane - Organic metalloid salt - Organic oxygen compound - Hydrocarbon derivative - Organic salt - Aliphatic heteromonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as organoheterosilanes. These are organosilicon compounds where the tetravalent silicon atom is linked to one or more heteroatoms.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

21 results found

Lot NumberCertificate TypeDateItem
D2607412Certificate of AnalysisMar 25, 2026 H156955
D2607413Certificate of AnalysisMar 25, 2026 H156955
D2607414Certificate of AnalysisMar 25, 2026 H156955
D2607416Certificate of AnalysisMar 25, 2026 H156955
D2607417Certificate of AnalysisMar 25, 2026 H156955
D2117118Certificate of AnalysisFeb 06, 2025 H156955
C2609045Certificate of AnalysisJul 01, 2024 H156955
D2516389Certificate of AnalysisJul 01, 2024 H156955
D2516631Certificate of AnalysisJul 01, 2024 H156955
D2516639Certificate of AnalysisJul 01, 2024 H156955
D2516642Certificate of AnalysisJul 01, 2024 H156955
L2215656Certificate of AnalysisNov 07, 2022 H156955
L2215655Certificate of AnalysisNov 07, 2022 H156955
L2215654Certificate of AnalysisNov 07, 2022 H156955
L2215653Certificate of AnalysisNov 07, 2022 H156955
L2215652Certificate of AnalysisNov 07, 2022 H156955
H2525097Certificate of AnalysisNov 07, 2022 H156955
E2421032Certificate of AnalysisNov 07, 2022 H156955
C2612211Certificate of AnalysisNov 07, 2022 H156955
I2220065Certificate of AnalysisNov 22, 2021 H156955
E2523022Certificate of AnalysisNov 22, 2021 H156955

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Chemical and Physical Properties
SolubilitySlightly soluble in water.
SensitivityMoisture sensitive
Flash Point(°F)95 °F
Flash Point(°C)35°C
Boil Point(°C)134°C
Melt Point(°C)63-67°C
Molecular Weight222.460 g/mol
XLogP3
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count3
Rotatable Bond Count0
Exact Mass222.056 Da
Monoisotopic Mass222.056 Da
Topological Polar Surface Area27.700 Ų
Heavy Atom Count12
Formal Charge0
Complexity139.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Documents & Articles
Citations of This Product
References
1. Sijia Zheng, Haiyan Xue, Ying Liu, Xing Yu, Zhihai Cao.  (2023)  Alveoli-Mimetic Synergistic Liquid and Solid Thermal Conductive Interface as a Novel Strategy for Designing High-Performance Thermal Interface Materials.  Small,      [PMID:38044278] [10.1002/smll.202306750]
2. Yueqin Li, Chen Chen, Lin Han, Zichun Lu, Ning Zhang, Runtian Miao.  (2023)  Lignosulfonate sodium assisted PEDOT-based all-gel supercapacitors with enhanced supercapacitance and wide temperature tolerance.  INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES,      [PMID:37924918] [10.1016/j.ijbiomac.2023.127852]
3. Sijia Zheng, Haiyan Xue, Jun Yao, Yang Chen, Michael A. Brook, Muhammad Ebad Noman, Zhihai Cao.  (2023)  Exploring Lipoic Acid-Mediated Dynamic Bottlebrush Elastomers as a New Platform for the Design of High-Performance Thermally Conductive Materials.  ACS Applied Materials & Interfaces,      [PMID:37590910] [10.1021/acsami.3c09826]
4. Mengdong Guo, Yue Huang, Zhongkai Chen, Yangping Zhang, Ya Zhang, Mingquan Zhu, Jie Zhang, Shengyu Feng.  (2021)  Preparation and Properties of Benzylsulfonyl-Containing Silicone Copolymers via Ring-opening Copolymerization of Macroheterocyclosiloxane and Cyclosiloxane.  CHEMISTRY-A EUROPEAN JOURNAL,  27  (29): (7897-7907).  [PMID:33783909] [10.1002/chem.202100309]
5. Yuan Yang, Yao Wang, Xiaoling Hou, Yao Lin, Lu Yang, Xiandeng Hou, Chengbin Zheng.  (2020)  Can low-temperature point discharge Be used as atomic emission source for sensitive determination of cyclic volatile methylsiloxanes?.  ANALYTICA CHIMICA ACTA,      [PMID:32534664] [10.1016/j.aca.2020.05.030]
6. Jiafeng Zou, Dandan Bao, Rui Ma, Zhihong Zhu, Xiaojie Chen, Jingjing Zhu, Xudong Fan, Ke Zhang, Hongyue Zheng, Fanzhu Li, Ji-Gang Piao.  (2020)  Green and Sustainable Self-Assembly Nanocomposite from Gentamicin Sulfate/Lignosulfonate with Efficient Antibacterial and Wound-Healing Activity.  ACS Sustainable Chemistry & Engineering,      [PMID:] [10.1021/acssuschemeng.0c00611]
7. Yangming Zou, Jingfan Zhang, Xiaorong Guo, Yujie Kang, Xin Tong, Wei Liu, Xinqi Di, Jun Sun, Hongfei Li, Xiaoyu Gu, Sheng Zhang.  (2025)  Enhancement of notched impact strength and flame retardancy in polycarbonate via micro-crosslinked polysiloxane.  COMPOSITES PART B-ENGINEERING,      [PMID:] [10.1016/j.compositesb.2025.112256]
8. Zichun Lu, Runtian Miao, Ning Zhang, Lingke Liu, Minjuan Gao, Xingyu Fan, Yueqin Li.  (2025)  One-Pot Ultrafast Fabricating of MXene-Based Conductive Hydrogel for Dual Strain-Temperature Sensors with Wide Temperature Tolerance.  ACS Applied Polymer Materials,      [PMID:] [10.1021/acsapm.5c01597]
9. Jinfeng Shi, Zhengyang Liu, Na Zhao, Shaofeng Liu, Zhibo Li.  (2022)  Controlled Ring-Opening Polymerization of Hexamethylcyclotrisiloxane Catalyzed by Trisphosphazene Organobase to Well-Defined Poly(dimethylsiloxane)s.  MACROMOLECULES,      [PMID:] [10.1021/acs.macromol.1c02654]
10. Xuewei Li, Beibei Li, Shurui Cai, Yu Zhang, Mingjie Xu, Chunmei Zhang, Bo Yuan, Ke Xing, Sheng Qin.  (2020)  Identification of Rhizospheric Actinomycete Streptomyces lavendulae SPS-33 and the Inhibitory Effect of its Volatile Organic Compounds against Ceratocystis fimbriata in Postharvest Sweet Potato (Ipomoea batatas (L.) Lam.).  Microorganisms,  (3): (319).  [PMID:32106520] [10.3390/microorganisms8030319]
11. Sijia Zheng, Huige Ren, Haiyan Xue, Lingqi Huang, Jianfeng Zhang, Zhihai Cao.  (2025)  α-Lipoic-Acid-Based Multi-Functional Silicone Composites for Soft Electronics.  ACS Sustainable Chemistry & Engineering,      [PMID:] [10.1021/acssuschemeng.4c09330]
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