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GB/T 20436-2025: Dimethylsiloxane cyclics mixture
Status: Valid GB/T 20436: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 20436-2025 | English | 329 |
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Dimethylsiloxane cyclics mixture
| Valid |
GB/T 20436-2025
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| GB/T 20436-2006 | English | 189 |
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Dimethylsioloxane cyclics mixture
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GB/T 20436-2006
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PDF similar to GB/T 20436-2025
Basic data | Standard ID | GB/T 20436-2025 (GB/T20436-2025) | | Description (Translated English) | Dimethylsiloxane cyclics mixture | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G17 | | Classification of International Standard | 71.080.99, 83.040 | | Word Count Estimation | 16,186 | | Date of Issue | 2025-06-30 | | Date of Implementation | 2026-01-01 | | Older Standard (superseded by this standard) | GB/T 20436-2006 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 20436-2025: Dimethylsiloxane cyclics mixture---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT20436-2025
ICS 71.080.99;83.040
CCSG17
National Standard of the People's Republic of China
Replaces GB/T 20436-2006
Dimethylsiloxane mixed ring
Released on June 30, 2025
Implementation on January 1, 2026
State Administration for Market Regulation
The National Standardization Administration issued
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 20436-2006 "Dimethylsiloxane Mixed Rings". Compared with GB/T 20436-2006, except for the structural adjustment
In addition to the integration and editorial changes, the main technical changes are as follows.
a) Added technical requirements for 1,5-dihydroxy-1,1,3,3,5,5-hexamethyltrisiloxane and silane (see Table 1, Appendix A and Appendix
B);
b) The test methods for total ring body and hexamethyldisiloxane were changed, and 1,5-dihydroxy-1,1,3,3,5,5-hexamethyltrisiloxane was added.
Test method for alkanes (see Appendix A, 4.5 of the.2006 edition);
c) The inspection rules have been changed (see 6.1, 5.1 of the.2006 edition).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Petroleum and Chemical Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Chemical Standardization (SAC/TC63).
This document was drafted by. Jiangxi Bluestar Spark Silicone Co., Ltd., Zhejiang Xin'an Chemical Group Co., Ltd., Hubei Xingrui Silicon Materials
Materials Co., Ltd., Tangshan Sanyou Silicon Industry Co., Ltd., Zhejiang Zhongtian Oriental Fluorosilicon Materials Co., Ltd., Luxi Chemical Group Co., Ltd.
Co., Ltd., Shandong Dongyue Organic Silicon Materials Co., Ltd., Yunnan Energy Investment Silicon Materials Technology Development Co., Ltd., Zhenjiang Jiangnan Chemical Co., Ltd.,
Sinopec (Beijing) Chemical Research Institute Co., Ltd., Zhejiang Kaihua Synthetic Materials Co., Ltd., Zhejiang Quzhou Guibao Chemical Co., Ltd., Guangzhou
Siluoke New Materials Co., Ltd.
The main drafters of this document are. Wang Haidong, Ouyang Wenwu, Chen Daowei, Li Shubing, Chen Xuejiang, Zhan Yonggang, Pang Yuna, Yi Gang, Zhang Bing,
Xue Xiaoli, Huang Yu, Xu Jianqing, Sun Dongming, Wu Hong, Kong Jianan, Ye Mingliang, Yan Changrui, Chen Lijun, Zhu Hongbin, Liu Yanan, Shi Kefei, Meng Qingxi,
Hu Jiaqi, Yip Shisheng, and Li Wenjing.
The previous versions of this document and the documents it replaces are as follows.
---First published in.2006 as GB/T 20436-2006;
---This is the first revision.
Dimethylsiloxane mixed ring
Warning---People who use this document should have practical experience in laboratory work. This document does not address all safety issues.
It is the responsibility of the operator to take appropriate safety and health measures and ensure compliance with relevant national laws and regulations.
1 Scope
This document specifies the technical requirements, test methods, inspection rules, and marking, packaging, transportation and
Storage.
This document is applicable to dimethylsiloxane mixed rings obtained by hydrolysis and cracking of dimethyldichlorosilane as raw material.
The siloxane mixed ring is mainly composed of hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane.
It is composed of an oxoalkane component (referred to as the total ring body).
Note. Molecular formula [(CH3)2SiO]nn=3~6.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB 190 Dangerous Goods Packaging Marking
GB/T 601 Preparation of standard titration solutions for chemical reagents
GB/T 603 Preparation of preparations and products used in test methods for chemical reagents
GB/T 3143 Determination of color of liquid chemical products (Hazen unit---platinum-cobalt color number)
GB/T 6488 Determination of refractive index of liquid chemical products
GB/T 6678 General Principles for Sampling of Chemical Products
GB/T 6680 General Rules for Sampling of Liquid Chemical Products
GB/T 6682 Specifications and test methods for water used in analytical laboratories
GB/T 8170 Rules for rounding off values and expression and determination of limit values
GB/T 9722 General rules for gas chromatography of chemical reagents
GB/T 14827 Determination of acidity and alkalinity of organic chemical products - Volumetric method
HG/T 4804-2015 Methyl high hydrogen silicone oil
3 Terms and Definitions
There are no terms or definitions that require definition in this document.
4 Technical Requirements
The quality of the dimethylsiloxane mixed ring body should meet the technical requirements shown in Table 1.
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