GB/T 31516-2015 English PDF

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GB/T 31516-2015: Classification method for hazardous characteristics of phthalic anhydride
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 31516-2015	239	Add to Cart	3 days	Classification method for hazardous characteristics of phthalic anhydride	Valid

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Basic data

Standard ID: GB/T 31516-2015 (GB/T31516-2015)
Description (Translated English): Classification method for hazardous characteristics of phthalic anhydride
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A80
Classification of International Standard: 13.300
Word Count Estimation: 11,123
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 phthalic anhydride hazardous properties of dangerous goods classification. This Standard applies to the solid phthalic anhydride dangerous goods classification dangerous. This Standard does not apply to the molten phthalic anhydride (UN No.3256) classification.

GB/T 31516-2015: Classification method for hazardous characteristics of phthalic anhydride

---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.
Classification method for hazardous characterisitics of phthalic anhydride ICS 13.300 A80 National Standards of People's Republic of China Phthalic anhydride classification of hazardous properties 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, Beijing Entry-Exit Inspection Quarantine Bureau, Guangdong Exit Inspection and Quarantine Technology Center. The main drafters of this standard. Liu Junfeng, Zhang Min, Wang Hongsong, Chenqing Jun, Xu Zhiqin, Yeshu Liang, Yang then army.

Introduction

Phthalic anhydride (abbreviated anhydride) is China's largest production and consumption of the four varieties of organic acid anhydride, which is mainly used for the production of phthalic Dicarboxylate plasticizers (e.g. dioctyl phthalate and dipropyl phthalate), alkyd resin, unsaturated polyester resin, a dye and Pigments, pharmaceuticals and pesticides, is an important import and export of chemical raw materials. Phthalic anhydride is a white scaly or crystalline powder, molecular formula C8H4O3, molecular weight 148.11, CAS No. 85-44-9, Slightly soluble in water. In the phthalic anhydride production process, maleic anhydride 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 2214, packaging category Ⅲ class. For accurate identification of hazardous properties of phthalic anhydride, phthalic anhydride establish a method of impurity is maleic anhydride content The key standard is formulated. Phthalic anhydride classification of hazardous properties

1 Scope

This standard specifies the solid phthalic anhydride hazardous properties of dangerous goods classification. This standard applies to solid phthalic anhydride Dangerous Goods Classification dangerous. This standard does not apply to the molten phthalic anhydride (UNNo.3256) classification.

2 Summary of Method

Weigh a certain amount of solid phthalic anhydride dubbed acetonitrile, after the organic filtration membrane filtration by gas chromatography analysis, external standard Statutory amount. According to the content of phthalic anhydride, maleic anhydride, determine its hazardous properties. The method of quantitative detection limit of maleic anhydride 5mg/kg. Common physical and chemical properties of phthalic anhydride and maleic anhydride, 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, set 100mL flask With acetonitrile dissolve and dilute to volume, and mix. The concentration of the solution was 100mg/L. 3.4 standard solution. accurate Pipette 0.25mL, 0.5mL, 1.0mL, 2.0mL, 5.0mL 10.0mL and maleic anhydride were marked Quasi stock solution in 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 Accurately weigh 1g sample of phthalic anhydride, accurate to 0.1mg, placed in 25mL volumetric flask, dissolved in acetonitrile and dilute to the mark Degree, mixing until the machine analysis. ......

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