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GB/T 638-2018 English PDF

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GB/T 638-2018: Chemical reagent -- Stannous chloride dihydrate
Status: Valid

GB/T 638: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 638-2018English199 Add to Cart 3 days [Need to translate] Chemical reagent -- Stannous chloride dihydrate Valid GB/T 638-2018
GB/T 638-2007English279 Add to Cart 3 days [Need to translate] Chemical reagent -- Tin (11) chloride dihydrate Obsolete GB/T 638-2007
GB/T 638-1988English199 Add to Cart 2 days [Need to translate] Chemical reagent--Tin (2) chloride dihydrate Obsolete GB/T 638-1988

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Basic data

Standard ID GB/T 638-2018 (GB/T638-2018)
Description (Translated English) Chemical reagent -- Stannous chloride dihydrate
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G62
Classification of International Standard 71.040.30
Word Count Estimation 10,138
Date of Issue 2018-06-07
Date of Implementation 2019-01-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 638-2018: Chemical reagent -- Stannous chloride dihydrate

---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.
Chemical reagent--Stannous chloride dihydrate ICS 71.040.30 G62 National Standards of People's Republic of China Replace GB/T 638-2007 Chemical reagent Stannous chloride dihydrate (stannous chloride) (ISO 6353-2.1983, Reagentsforchemicalanalysis- Part 2.Specifications-Firstseries, NEQ) Published on.2018-06-07 2019-01-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 638-2007 "chemical reagent stannous chloride (II) chloride (thin chloride)", and GB/T 638-2007 Compared to the main technical changes are as follows. --- Increased sodium, potassium, calcium three specifications and determination methods (see Chapter 4, 5.6, 5.7, 5.8); ---Modified packaging and logo (see Chapter 7, Chapter 7 of the.2007 edition); --- Cancel hydrogen sulfide without sediment (Chapter 4, 5.11 of the.2007 edition). This standard uses the redrafting method reference ISO 6353-2.1983 "Chemical Analysis Reagents Part 2. Specifications 1 Series" in R38 The preparation of "stannous chloride dihydrate" is not equivalent to ISO 6353-2.1983. This standard was proposed by the China Petroleum and Chemical Industry Federation. This standard is under the jurisdiction of the National Chemical Standardization Technical Committee (SAC/TC63). This standard was drafted. Guangdong Guanghua Technology Co., Ltd., Chongqing Chuandong Chemical (Group) Co., Ltd. The main drafters of this standard. Zhou Lang, Zhang Min, Zhang Jianfeng, Chen Qunqing, Zhang Zhibin, Wang Lu. The previous versions of the standards replaced by this standard are. ---GB/T 638-1965, GB/T 638-1978, GB/T 638-1988, GB/T 638-2007. Chemical reagent Stannous chloride dihydrate (stannous chloride)

1 Scope

This standard specifies the properties, specifications, tests, inspection rules, packaging and marking of the chemical reagent stannous chloride dihydrate (stannous chloride). This standard applies to the chemical reagent stannous chloride dihydrate (stannous chloride).

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. Preparation of GB/T 601 chemical reagent standard titration solution Preparation of standard solution for GB/T 602 chemical reagent impurity determination Preparation of preparations and products used in GB/T 603 chemical reagent test method GB/T 610-2008 General method for determination of arsenic in chemical reagents GB/T 6682 Analytical laboratory water specifications and test methods GB/T 9723-2007 General rules for chemical reagents for flame atomic absorption spectrometry GB/T 9728 chemical reagent sulfate determination method GB 15346 chemical reagent packaging and marking HG/T 3484 Chemical Reagent Standard Glass Emulsion and Clarity Standard HG/T 3921 Chemical Reagent Sampling and Acceptance Rules

3 traits

This product is colorless crystal, which is hydrolyzed in water to form an insoluble basic salt. It is dissolved in dilute hydrochloric acid solution and gradually oxidized in air. Molecular formula. SnCl2·2H2O Relative molecular mass. 225.62 (according to the international relative atomic mass in.2013) CAS No.. 10025-69-1

4 specifications

The specifications of stannous chloride dihydrate are shown in Table 1. Table 1 Specifications of stannous chloride dihydrate Name analysis Content (SnCl2·2H2O), w/% ≥98.0 ≥97.0 Clarity test/number ≤ 3 ≤ 5 Insoluble matter of hydrochloric acid, w/% ≤0.005 ≤0.01

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