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15721-05-8 Usage


Heptamethylcyclotetrasiloxane, also known as HMCTS, is an organosiloxane compound with the chemical formula (CH3)3SiO)2Si(CH3)2O. It is a colorless liquid with a low odor and is known for its unique properties, such as low toxicity, high thermal stability, and excellent lubricating characteristics.


Used in Chemical Research:
Heptamethylcyclotetrasiloxane is used as a research compound for studying the structure-activity relations of organosiloxanes. Its unique molecular structure allows scientists to explore the properties and potential applications of this class of compounds.
Used in Pharmaceutical Industry:
In the pharmaceutical industry, Heptamethylcyclotetrasiloxane is used in the study of the female reproductive system. Its properties make it a valuable tool for understanding the interactions between organosiloxanes and biological systems, which can lead to the development of new drugs and therapies for various conditions related to the female reproductive system.

Check Digit Verification of cas no

The CAS Registry Mumber 15721-05-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,7,2 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 15721-05:
88 % 10 = 8
So 15721-05-8 is a valid CAS Registry Number.



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 14, 2017

Revision Date: Aug 14, 2017


1.1 GHS Product identifier

Product name 2,2,4,4,6,6,8-heptamethyl-1,3,5,7,2,4,6,8λ<sup>3</sup>-tetraoxatetrasilocane

1.2 Other means of identification

Product number -
Other names Heptamethylcyclotetrasiloxane

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:15721-05-8 SDS

15721-05-8Relevant articles and documents

Synthesis of high-purity heptamethylchlorocyclotetrasiloxane


, p. 921 - 922 (2007/10/03)

The procedures of preparation of heptamethylcyclotetrasiloxane (CH3)7Si4O4H in a 60% yield, its exhaustive purification, and its chlorination to form (CH3)7Si4O4Cl in a quantitative yield were developed. The composition of heptamethylchlorocyclotetrasiloxane and the content of alkali and heavy metal impurities in this compound, permissible for materials used in electronics, were determined by elemental analysis, gas-liquid chromatography, flame photometry, and atomic absorption analysis.


Chernyshev, E. A.,Mudrova, N. A.,Krasnova, T. L.,Petrunin, A. B.

, p. 634 - 635 (2007/10/02)


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