GB/T 10705-2008Chemical reagent - 5-Sulfosalicylic acid dihydrate (English PDF)

Foreword

This standard replaces GB/T 10705-1989 "Chemicals

--- 5-sulfosalicylic acid," compared with the GB/T 10705-1989 major change Of the following.

--- Standard name changed to "dihydrate, 5-sulfosalicylic acid (5-sulfosalicylic acid)";

--- Clarity test specifications by a "qualified" to "3", "5" (1989 version 3.3, Chapter 4 of this edition);

--- Modify the method for the determination of salicylic acid using a spectrophotometer (1989 version 4.3.8, this version 5.12);

--- Water insoluble matter, burning residue, chlorides, sulfates, heavy metals and chemical reagents five common methods instead Determination (1989 edition 4.3.2,4.3.3,4.3.4,4.3.5,4.3.7, Excerpts 5.6,5.7,5.8,5.9,5 .11). The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee Chemistry Chemicals Branch (SAC/TC63/SC3) centralized. This standard is drafted by: Nanjing Chemical Reagent Co., Ltd. The main drafters of this standard. Wang Hao, Gao Wei more. This standard was first published in 1959, the first revision in 1976, the Second Amendment in 1981, in 1989 the third revision. Chemicals 5-sulfosalicylic acid dihydrate (5-sulfosalicylic acid) Molecular formula. C7H6O6S · 2H2O Structure. Molecular weight. 254.22 (according to 2005 international relative atomic mass)

1 Scope

GB/T 10705-2008 is the Chinese national standard on chemical reagent - 5-sulfosalicylic acid dihydrate, in the field of chemical technology. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 15 May 2008 by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; Standardization Administration of China, and has been in force since 1 November 2008. Classification: ICS 71.040.30, CCS G63. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This standard specifies the chemical reagent in 5-sulfosalicylic acid dihydrate traits, specifications, testing, packaging and inspection rules and signs. This standard applies to testing chemical reagent 5-sulfosalicylic acid dihydrate in.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. Preparation of

GB/T 601 chemical reagent standard titration solution

GB/T 602 Determination of impurities in chemical reagents prepared standard solution ( GB/T 602-2002,

ISO 6353-1. 1982, NEQ) with

GB/T 603 chemical reagent test method Preparations of articles ( GB/T 603-2002,

ISO 6353-1 with. 1982, NEQ)

GB/T 6682 analytical laboratory use specifications and test methods ( GB/T 6682-2008, ISO 3696. 1987, MOD)

GB/T 9721 Chemicals General molecular absorption spectrophotometry (UV and visible part)

GB/T 9728 General method for determination of chemical reagents sulfate ( GB/T 9728-2007, ISO 6353-1. 1982, NEQ)

GB/T 9729 General method for determination of chloride Chemicals ( GB/T 9729-2007, ISO 6353-1. 1982, NEQ)

GB/T 9735 General method for determination of heavy metals Chemicals ( GB/T 9735-2008, ISO 6353-1. 1982, NEQ)

GB/T 9738 Determination of water insoluble chemical reagent - General method ( GB/T 9738-2008, ISO 6353-1. 1982, NEQ)

GB/T 9741-2008 Determination of residue on ignition Chemicals General method ( ISO 6353-1. 1982, NEQ)

GB 15346 chemical reagent packaging and marking

3 Characters

This reagent is a white crystalline powder, soluble in water.

4 Specification

Specifications 5-sulfosalicylic acid dihydrate in Table 1.