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GB/T 21840-2025 English PDF

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US$289.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 21840-2025: Vulcanizing accelerator - N-tert-butyl-1, 3-benzothiazole-2-sulfenamide(TBBS)
Status: Valid

GB/T 21840: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 21840-2025	289	Add to Cart	3 days	Vulcanizing accelerator - N-tert-butyl-1, 3-benzothiazole-2-sulfenamide(TBBS)	Valid
GB/T 21840-2008	130	Add to Cart	Auto, < 3 mins	Vulcanizing accelerator TBBS	Valid

Similar standards

GB/T 40409 GB/T 8826 GB/T 31332 GB/T 26527 GB/T 21841

Basic data

Standard ID: GB/T 21840-2025 (GB/T21840-2025)
Description (Translated English): Vulcanizing accelerator - N-tert-butyl-1, 3-benzothiazole-2-sulfenamide(TBBS)
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G71
Classification of International Standard: 83.040.20
Word Count Estimation: 14,198
Date of Issue: 2025-08-01
Date of Implementation: 2026-02-01
Older Standard (superseded by this standard): GB/T 21840-2008
Issuing agency(ies): State Administration for Market Regulation, Standardization Administration of China

GB/T 21840-2025: Vulcanizing accelerator - N-tert-butyl-1, 3-benzothiazole-2-sulfenamide(TBBS)

---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/GBT21840-2025
ICS 83.040.20 CCSG71 National Standard of the People's Republic of China Replaces GB/T 21840-2008 Vulcanization accelerator N-tert-butyl-1, 3-Benzothiazole-2-sulfenamide (TBBS) Released on August 1, 2025 Implementation on February 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 21840-2008 "Vulcanization Accelerator TBBS". Compared with GB/T 21840-2008, except for the structural adjustment and In addition to editorial changes, the main technical changes are as follows. --- Added a chapter on terms and definitions (see Chapter 3); --- Added technical requirements for vulcanization accelerator TBBS granular type (see Table 1); --- Changed the technical indicators of initial melting point, methanol insoluble matter and purity (see Table 1, Table 1 of the.2008 edition); --- Added instrumental method for determining initial melting point (see 5.3.2); --- Changed the test method for purity (see 5.9.1, 4.8 of the.2008 edition); --- Added titration method for purity determination (see 5.9.2). 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 Rubber and Rubber Products of Standardization (SAC/TC35). This document was drafted by. Shandong Yanggu Huatai Chemical Co., Ltd., Shandong Shangshun Chemical Co., Ltd., and Sennics Technology Co., Ltd. Co., Ltd., Kemai Chemical Co., Ltd., Ningbo Aikemu New Materials Co., Ltd., Henan Kailun Chemical Co., Ltd., Shandong Sidi Er Chemical Technology Co., Ltd., Puyang Kemaowei New Materials Co., Ltd., Henan Yongxin Chemical Co., Ltd., Hebi Hengli Rubber and Plastic Co., Ltd., Shanxi Chemical Research Institute (Co., Ltd.). The main drafters of this document are. Wang Wenbo, Shi Lilong, An Fang, Wang Caipeng, Yang Chunxia, Li Fengwei, Bai Chunmei, Yi Yuqiong, Wang Kuiliang, Tian Xu, Gan Zhonghao, Song Kuijing, and Wang Yanbin. This document was first published in.2008 and this is the first revision. Vulcanization accelerator N-tert-butyl-1, 3-Benzothiazole-2-sulfenamide (TBBS) Warning. Personnel using this document should have practical experience in regular laboratory work. This document does not address all possible safety issues. The user is responsible for taking appropriate safety and health measures and ensuring that the conditions stipulated by relevant national laws and regulations are met.

1 Scope

This document specifies the principles and methods of vulcanization accelerator N-tert-butyl-1,3-benzothiazole-2-sulfenamide (hereinafter referred to as vulcanization accelerator TBBS). It also describes the corresponding batching rules, sampling, test methods, and stipulates the marking, packaging, transportation and storage. content. This document applies to the detection of vulcanization accelerator TBBS made by oxidation of tert-butylamine and vulcanization accelerator MBT. Chemical name. N-tert-butyl-1,3-benzothiazole-2-sulfenamide Molecular formula.C11H14N2S2 Structural formula. Relative molecular mass. 238.37 (according to the 2022 international relative atomic mass) CAS No..95-31-8

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/T 191 Pictorial symbols for packaging, storage and transportation 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 617-2006 General method for determination of melting point range of chemical reagents GB/T 6679 General Rules for Sampling of Solid Chemical Products GB/T 6682 Specifications and test methods for water used in analytical laboratories GB/T 8170-2008 Rules for rounding off values and expression and determination of limit values GB/T 11409-2008 Test methods for rubber antioxidants and vulcanization accelerators GB/T 21184-2007 Test method for sulfenamide accelerators in rubber compounding ingredients

3 Terms and Definitions

There are no terms or definitions that require definition in this document. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 21840-2025_English be delivered?

Answer: Upon your order, we will start to translate GB/T 21840-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 21840-2025_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 21840-2025_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 21840-2025?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 21840-2025 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.