GB/T 31514-2015 English PDF

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GB/T 31514-2015: Classification method for hazardous characteristics of tetrahydrophthalic acid anhydride
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 31514-2015	189	Add to Cart	3 days	Classification method for hazardous characteristics of tetrahydrophthalic acid anhydride	Valid

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Basic data

Standard ID: GB/T 31514-2015 (GB/T31514-2015)
Description (Translated English): Classification method for hazardous characteristics of tetrahydrophthalic acid anhydride
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A80
Classification of International Standard: 13.300
Word Count Estimation: 9,988
Date of Issue: 2015-05-15
Date of Implementation: 2015-12-01
Regulation (derived from): National Standard Announcement 2015 No. 15
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 solid state tetrahydrophthalic anhydride hazardous properties of dangerous goods classification. This Standard applies to solid-state classification tetrahydrophthalic anhydride hazard characteristics of dangerous goods.

GB/T 31514-2015: Classification method for hazardous characteristics of tetrahydrophthalic acid anhydride

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Classification method for hazardous characterisitics of tetrahydrophthalic acid anhydride ICS 13.300 A80 National Standards of People's Republic of China Tetrahydrophthalic acid anhydride hazardous properties Classification acidanhydride Issued on. 2015-05-15 2015-12-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard is managed by the National Standardization Technical Committee chemicals dangerous (SAC/TC251) and focal points. This standard was drafted. Changzhou import and export of industrial and consumer safety testing center, Changzhou Exit Inspection and Quarantine, China Chemical Industry Technology Art Development Center, Guangdong Exit Inspection and Quarantine Technology Center. The main drafters of this standard. Liu Junfeng, Zhang Min, Cao Meng Ran, Wang Hongsong, Lee Jun, Yeshu Liang, Yang then army.

Introduction

Tetrahydrophthalic anhydride (THPA for short) is mainly used for the production of alkyd resins, unsaturated polyester resins, paints, insecticides, curing Modifiers, plasticizers and surfactants, is a common organic synthesis intermediates. Tetrahydrophthalic acid anhydride is a white crystalline solid or flake, formula C8H8O3, molecular weight 152.16, CAS Number 935-79-5 slightly soluble in water. In THPA production process, maleic anhydride is one of the major synthetic materials, is one of the common impurities. United Nations "on the Recommendations on the Transport of Dangerous Goods Model Regulations" Chapter 3.3 "apply to certain items special provision" of Article 169 Clearly stipulates that if the solid phthalic anhydride, maleic anhydride or tetrahydrophthalic anhydride content of less than or equal to 0.05%, its hazard classification results Non-hazardous, on the contrary it is classified as Class 8 corrosive substances, UN number (UNNo.) Of 2698, packaging category Ⅲ class. For accurate identification of tetrahydrophthalic anhydride hazardous characteristics, the establishment of tetrahydrophthalic acid anhydride, maleic anhydride content of impurities The measurement method is the key standard is formulated. Tetrahydrophthalic acid anhydride hazardous properties Classification

1 Scope

This standard specifies the solid tetrahydrophthalic anhydride hazardous properties of dangerous goods classification. This standard applies to solid-state classification tetrahydrophthalic anhydride hazardous properties of dangerous goods.

2 Summary of Method

Weigh a quantity of solid dubbed tetrahydrophthalic anhydride in acetonitrile, filtered through an organic filter membrane, is divided by gas chromatography Analysis, external standard. According to the content of solid tetrahydrophthalic acid anhydride, maleic anhydride, determine its hazardous properties. The method of maleic acid Anhydride quantitative detection limit of 5mg/kg. Tetrahydrophthalic acid anhydride and maleic anhydride common physicochemical properties see Appendix A.

3 Reagents and materials

3.1 acetonitrile. chromatography. 3.2 maleic anhydride standard. Purity ≥99%. 3.3 maleic anhydride standard stock solution. Weigh accurately 10mg maleic anhydride standard, accurate to 0.1mg, placed in 100mL flask, Dilute to the mark with acetonitrile and mix. The concentration of the solution was 100mg/L. 3.4 standard solution. Pipette respectively 0.25mL, 0.5mL, 1.0mL, 2.0mL, 5.0mL 10.0mL maleic anhydride and standard stock Preparation of the solution to six 100mL flask with acetonitrile to volume, the standard working solution with a concentration of 0.25mg/L, 0.5mg/L, 1.0mg/L, 2.0mg/L, 5.0mg/L and 10.0mg/L.

4 instruments and equipment

4.1 Gas Chromatograph (GC). equipped with a flame ionization detector (FID). 4.2 organic membranes. 0.45μm. 4.3 Analytical balance. accurate to 0.1mg. Step 5 Analysis 5.1 Preparation of test solution Weigh accurately 1g tetrahydrophthalic anhydride sample, accurate to 0.1mg, placed in 25mL volumetric flask, dissolved in acetonitrile and set the volume To the mark, and mix until the machine analysis. 5.2 Gas chromatographic conditions a) Column. DB-17MS30m × 0.25mm (inner diameter) × 0.25μm (film thickness) capillary column, or equivalent person; b) Column temperature. initial temperature 70 ℃, holding 2min, with 20 ℃/min heating to 220 ℃, 2min maintained; c) Inlet temperature. 240 ℃; d) detector temperature. 240 ℃; e) Carrier gas. nitrogen (purity > 99.99%); ......

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