1、Designation:D343815Standard Practice forSampling and Handling Naphthalene,Maleic Anhydride,andPhthalic Anhydride1This standard is issued under the fixed designation D3438;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of la
2、st revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice covers procedures for sampling and han-dling naphthalene,maleic anhydride,and phthalic anhydride invarious sol
3、id forms,and as liquids at elevated temperatures ina safe manner that represents and preserves quality.1.2 Any person sampling or handling these products shouldconsult the applicable Safety Data Sheet(SDS)for specific firstaid instructions and information on the proper equipment tohave available for
4、 use in the event of personal contact orexposure.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility o
5、f the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For specific hazardstatements,see Sections 3,4,5,6,and 7 and an appropriateSDS.2.Referenced Documents2.1 ASTM Standards:2E300 Practice for Samplin
6、g Industrial Chemicals2.2 Other Documents:OSHA Regulations,29 CFRparagraphs 1910.1000 and1910.120033.Significance and Use3.1 This practice is issued to provide information useful inestablishing sampling procedures.It is expected that thisinformation will only be utilized in conjunction with anexisti
7、ng health and safety program and consultation with theappropriate SDS.The information provided herein cannot beused as a substitute for expert safety and medical advice,butrather as a supplement to such advice.4.Description of Products(See Table 1)4.1 Phthalic anhydride is classified as hazardous by
8、 theDepartment of Transportation as a corrosive material and istherefore subject to DOT regulations governing the transpor-tation of hazardous materials.Maleic anhydride and naphtha-lene are classified as hazardous by the Department of Trans-portation and are subject to DOT regulations.Maleic anhydr
9、idehas the classification corrosive material,and naphthalene hasthe classification flammable solid.4.1.1 These products are normally transported in severaltypes of containers,including cartons,barrels,bags,cans,metal and fiber drums,tank trucks,tank cars,and barges.5.Hazards5.1 HealthConsult current
10、 OSHA regulations and suppli-ers Safety Data Sheet,and local regulations for all materialsused in this practice.5.1.1 Aside from the risk of burns in sampling theseproducts when molten,and a possibility of dermatitis fromimpurities,particularly in crude grades,industrial use does notpresent a signif
11、icant health hazard.However,ordinary sam-pling precautions must be observed to protect personnel fromcontact with molten material or excessive exposure to dusts orhigh concentrations of vapor.5.1.2 Precautions must be observed to protect personnelfrom excessive inhalation of vapors and dust.NOTE1For
12、 permissible exposure limits see OSHA Regulations,paragraph 1910.1000.5.2 Fire:5.2.1 These products in both the solid and liquid forms arecombustible,and introduce a potential fire hazard where theyare stored,handled,or used.1This practice is under the jurisdiction of ASTM Committee D16 on AromaticH
13、ydrocarbons and Related Chemicals and is the direct responsibility of Subcom-mittee D16.08 on Handling and Sampling Aromatic and Cyclic Hydrocarbons.Current edition approved June 1,2015.Published July 2015.Originally approvedin 1975.Last previous edition approved in 2010 as D3438 10.DOI:10.1520/D343
14、8-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from U.S.Government Printing Office Superintendent
15、 of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www/ecfr/gov.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.2.2 Naphthalene,maleic anhydride an
16、d phthalic anhydridevapors or dust can form explosive mixtures with air.5.2.3 When molten naphthalene,at temperatures above110C,comes into contact with water,foaming or possibleexplosion may result.5.2.4 Dry chemicals,carbon dioxide,and foam can all beused in fighting fires involving these materials.5.2.5 Maleic anhydride decomposes violently in the pres-ence of amines or alkali metals,especially at elevated tempera-tures.6.Protective Equipment6.1 Persons working with molten naphthalene,maleican
