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GB/T 20436-2025 English PDF

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US$329.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 20436-2025: Dimethylsiloxane cyclics mixture
Status: Valid

GB/T 20436: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 20436-2025	329	Add to Cart	4 days	Dimethylsiloxane cyclics mixture	Valid
GB/T 20436-2006	189	Add to Cart	3 days	Dimethylsioloxane cyclics mixture	Valid

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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Older Standard (superseded by this standard): GB/T 20436-2006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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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 20436-2025_English be delivered?

Answer: Upon your order, we will start to translate GB/T 20436-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 20436-2025_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 20436-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 20436-2025?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 20436-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.