1、Designation:D125722Standard Specification forHigh-Gravity Glycerin1This standard is issued under the fixed designation D1257;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates
2、the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers high-gravity glycerin(98.7weight%,minimum)for use in the manufacture of alkyd andother synthetic resins.1.2 The following applies to all specifie
3、d limits in thisstandard;for purposes of determining conformance with thisstandard,an observed value or a calculated value,shall berounded off“to the nearest unit”in the last right-hand digitused in expressing the specification limit,in accordance withthe rounding-off method of Practice E29.1.3 The
4、values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 For specific hazard information and guidance,see thesuppliers Material Safety Data Sheet for materials listed in thisspecification.1.5 This international standard was developed in
5、accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 AST
6、M Standards:2D1258 Test Methods for High-Gravity Glycerin(Withdrawn2011)3E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 U.S.Federal Standard:4PPP-C-2020 Chemicals,Liquid,Dry,and Paste:Packagingof3.Properties3.1 The glycerin shall conform to the
7、following require-ments:Apparent specific gravity,min:15.6/15.6 C(60 60 F)1.2620or25/25 C1.2587Color,Pt-Co scale,max20Sulfate ash,max,weight%0.1Acid value,max,mg KOH per g ofmaterial0.3_4.Test Methods and Sampling4.1 The material shall be sampled and the properties enu-merated in this specification
8、determined in accordance withTest Method D1258.5.Packaging and Package Marking5.1 Package size to be agreed upon between the purchaserand supplier.5.2 Packaging shall conform to applicable carrier rules andregulations or when specified shall conform to Fed.Spec.PPP-C-2020.6.Keywords6.1 high-gravity
9、glycerins1This specification is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.35 on Solvents,Plasticizers,and Chemical Intermediates.Current edition approved Jan.1,2022.Published January 2022.O
10、riginallyapproved in 1979.Last previous edition approved in 2012 as D1257 07(2012)which was withdrawn January 2021 and reinstated in January 2022.DOI:10.1520/D1257-22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book
11、 of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-509
12、8,http:/www.dodssp.daps.mil.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for
13、theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1?ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Use
14、rs of this standard are expressly advised that determination of the validity of any such patent rights,and the riskof infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every f
15、ive years andif not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of theresponsible technical co
16、mmittee,which you may attend.If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Individual reprints(single or multiple copies)of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e
