GB/T 3728-2023Ethyl acetate for industrial use (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document replaces GB/T 3728-2007 "Ethyl acetate for industrial use". Compared with GB/T 3728-2007, except for structural adjustment and editing In addition to sexual changes, the main technical changes are as follows.

---Changed the technical requirements (see Table 1, Chapter 3 of the 2007 edition);

---Deleted the odor requirements and test methods (see Chapter 3 and 4.9 of the 2007 edition);

---The test methods for the determination of ethyl acetate and ethanol have been changed, and the test methods for the determination of benzene, toluene, ethylbenzene and xylene have been added (see 5.4, 2007 version of 4.2 and 4.3);

---Changed the determination method of moisture (see 5.5, 4.4 of the 2007 edition);

---The safety part is adjusted to an informative appendix (see Appendix B, Chapter 7 of the 2007 edition).

The previous versions of this document and the documents it replaces are as follows.

---First published as GB/T 3728-1983 in 1983, revised for the first time in 1991, and revised for the second time in 2007;

---This is the third revision.

1 Scope

This document specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of ethyl acetate for industrial use.

This document applies to industrial ethyl acetate produced by the esterification of acetic acid and ethanol under a catalyst.

Note: The molecular formula of ethyl acetate is C4H8O2, the structural formula is CH3COOCH2CH3, and the relative molecular mass is 88.11 (according to the 2022 international relative atomic mass quantity).

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB 190 Dangerous goods packaging markings

GB/T 601 Preparation of chemical reagent standard titration solution

GB/T 603 Preparation of preparations and products used in chemical reagent test methods

GB/T 3143 Liquid chemical product color determination method (Hazen unit---platinum-cobalt color number)

GB/T 3723 General Safety Principles for Sampling Industrial Chemical Products

GB/T 4472 Determination of density and relative density of chemical products

GB/T 6283 Determination of moisture content in chemical products Karl Fischer method (general method)

GB/T 6324.2 Test methods for organic chemical products Part 2: Determination of dry residue after evaporation of volatile organic liquids in water bath

GB/T 6324.8 Test methods for organic chemical products Part 8: Determination of moisture content of liquid products by Karl Fischer coulombometry

GB/T 6678 General principles for sampling of chemical products

GB/T 6680 General rules for sampling of liquid chemical products

GB/T 6682 Specifications and test methods for water used in analytical laboratories

GB/T 8170 Numerical rounding rules and representation and determination of limit values

GB/T 9722 General rules for gas chromatography with chemical reagents

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Technical requirements

Ethyl acetate for industrial use should comply with the requirements in Table 1.