|
US$129.00 ยท In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 1646-2020: 2-Naphthol
Status: Valid GB/T 1646: Evolution and historical versions
PDF similar to GB/T 1646-2020
Basic data | Standard ID | GB/T 1646-2020 (GB/T1646-2020) | | Description (Translated English) | 2-Naphthol | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G56 | | Classification of International Standard | 71.100.01; 87.060.10 | | Word Count Estimation | 7,769 | | Date of Issue | 2020-11-19 | | Date of Implementation | 2021-10-01 | | Older Standard (superseded by this standard) | GB/T 1646-2012 | | Quoted Standard | GB/T 2386-2014; GB/T 6678-2003; GB/T 8170-2008; GB/T 9722-2006; GB 15258 | | Regulation (derived from) | National Standard Announcement No. 26 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard specifies the requirements, sampling, test methods, inspection rules, marking, labeling, packaging, transportation and storage of 2-naphthol. This standard applies to the quality control of 2-naphthol products. | GB/T 1646-2020: 2-Naphthol---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(2-naphthol)
ICS 71.100.01;87.060.10
G56
National Standards of People's Republic of China
Replace GB/T 1646-2012
2-naphthol
2-Naphthol
2020-11-19 released
2021-10-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 1646-2012 "2-Naphthol". Compared with GB/T 1646-2012, the main technical changes except for editorial changes
Change as follows.
--- Amend "CASRN" to "CAS Number" (see Chapter 1, Chapter 1 of the.2012 edition);
---Added thio-2-naphthol content control items and indicators (see Chapter 3, Chapter 3 of the.2012 edition);
---Modified the index of first-class products with low boiling content (see Chapter 3, Chapter 3 of the.2012 edition);
---Modified the index of qualified products with naphthalene content (see Chapter 3, Chapter 3 of the.2012 edition);
---Modified the indicators of first-class and qualified products with 2,2'-binaphthol content (see Chapter 3, Chapter 3 of the.2012 edition);
---Modified the indicators of qualified products with high boiling content (see Chapter 3, Chapter 3 of the.2012 edition);
---Modified the sampling volume (see Chapter 4, Chapter 4 of the.2012 edition);
---Modified the appearance evaluation method (see 5.2, 5.2 of the.2012 edition);
---Modified the specifications of the capillary column in the determination method of 2-naphthol purity and organic impurity content [see 5.3.2.3,.2012 edition
5.3.3e)];
---Modified the temperature programmed chromatographic conditions in the 2-naphthol purity and organic impurity content determination method (see 5.3.4,.2012 edition
5.3.4);
---Modified the solvent of the sample solution in the 2-naphthol purity and organic impurity content determination method (see 5.3.3,.2012 edition
5.3.2);
--- Deleted the "production license number" in the logo (see 7.1 of the.2012 edition);
--- Modified the allowable difference of net content of packaging (see 7.3,.2012 edition of 7.3).
This standard was proposed by the China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of the National Dyestuff Standardization Technical Committee (SAC/TC134).
Drafting organizations of this standard. Shandong Century Sunshine Technology Co., Ltd., Inner Mongolia Meilijian Technology Chemical Co., Ltd., Tangshan Baoxiang Chemical Industry
Products Co., Ltd., Shenyang Chemical Research Institute Co., Ltd., Shenyang Shenhua Institute Testing Technology Co., Ltd., National Dyestuff Quality Supervision and Inspection Center.
The main drafters of this standard. Fu Xiaomei, Zhao Zhimin, Zhang Zhengfu, Hou Yahui, Xue Yan, He Jinghua, Pu Aijun, Zhang Yongquan, Ji Lanqin.
The previous versions of the standard replaced by this standard are as follows.
---GB 1646-1979, GB 1646-1989, GB/T 1646-1994, GB/T 1646-2003, GB/T 1646-2012.
2-naphthol
1 Scope
This standard specifies the requirements, sampling, test methods, inspection rules, marking, labeling, packaging, transportation and storage of 2-naphthol.
This standard applies to the quality control of 2-naphthol products.
Structural formula.
Molecular formula. C10H8O
Relative molecular mass. 144.17 (according to.2019 international relative atomic mass)
CAS Number. 135-19-3
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 2386-2014 Determination of moisture in dyes and dye intermediates
GB/T 6678-2003 General Rules for Sampling of Chemical Products
GB/T 8170-2008 Numerical rounding rules and the expression and determination of limit values
GB/T 9722-2006 Chemical reagent gas chromatography general rules
GB 15258 Regulations for the preparation of chemical safety labels
3 requirements
The quality requirements of 2-naphthol should meet the requirements of Table 1.
Table 1 Quality requirements of 2-naphthol
Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 1646-2020_English be delivered?Answer: Upon your order, we will start to translate GB/T 1646-2020_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 1646-2020_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 1646-2020_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+ countriesQuestion 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 [email protected]. 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 1646-2020?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 1646-2020 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.
|