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GB/T 696-2008 English PDF

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GB/T 696-2008: Chemical reagent -- Urea
Status: Valid

GB/T 696: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 696-2008169 Add to Cart 3 days Chemical reagent -- Urea Valid
GB/T 696-1994239 Add to Cart 2 days Chemical reagent. Urea Obsolete
GB 696-1977199 Add to Cart 2 days Chemical reagents--Urea Obsolete

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Basic data

Standard ID: GB/T 696-2008 (GB/T696-2008)
Description (Translated English): Chemical reagent -- Urea
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G63
Classification of International Standard: 71.040.30
Word Count Estimation: 7,740
Date of Issue: 2008-05-15
Date of Implementation: 2008-11-01
Older Standard (superseded by this standard): GB/T 696-1994
Quoted Standard: GB/T 601; GB/T 602; GB/T 603; GB/T 6682; GB/T 9728; GB/T 9729; GB/T 9735; GB/T 9738; GB/T 9739; GB/T 9741-2008; GB 15346; HG/T 3484; HG/T 3921
Regulation (derived from): National Standard Approval Announcement 2008 No.8 (Total No.121)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the chemical reagent urea traits, specifications, trial, packaging and inspection rules and signs. This standard applies to chemical reagent urea test.

GB/T 696-2008: Chemical reagent -- Urea

---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. Urea ICS 71.040.30 G63 National Standards of People's Republic of China Replacing GB/T 696-1994 Chemicals urea (urea) Posted 2008-05-15 2008-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard replaces GB/T 696-1994 "Chemicals urea (urea)," compared with the GB/T 696-1994 main changes are as follows. Chemical reagents common method --- chloride instead Determination (1994 version 4.2.4, this version 5.7). 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. Shenyang Chemical Reagent Factory, Yixing City, the second chemical reagent factory. The main drafters of this standard. Tian Ju, Yang Yuhua, Huangyu Juan, Ma Hong, Lu Ximing. This standard was first published in 1965, in 1977 and first revised in 1994, the Second Amendment. Chemicals urea (urea) Exemplary formula. H2NCONH2 Molecular Weight. 60.06 (according to 2005 international relative atomic mass)

1 Scope

This standard specifies the chemical reagent urea characteristics, specifications, testing, packaging and inspection rules and signs. This standard applies to chemical agents urea test.

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 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 9739 General method for determination of iron chemical reagents (GB/T 9739-2006, 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 HG/T 3484 standard chemical reagents glass emulsion and clarity standards HG/T 3921 Chemicals sampling and acceptance rules

3 Characters

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

4 Specification

Urea as shown in Table 1. Table 1 Name AR chemically pure Content (H2NCONH2), /% ≥99.0 ≥99.0 Clarity test/number ≤2 ≤4 Water-insoluble, /% ≤0.005 ≤0.02 Residue on ignition (Sulfate), /% ≤0.01 ≤0.02
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