ASTM_D_458_-_85_1998.pdf

Designation:D 458 85(Reapproved 1998)Standard Specification forSoda Ash1This standard is issued under the fixed designation D 458;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 the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers material suitable for variouswashing,cleaning,and scouring processes,with or withoutsoap as conditions demand,and where a moderately strongalkaline material is desired.1.2 This material may be hazardous if not properly man-aged.1.3 Precautionary information for the safe use,storage anddisposal of this material should be preliminarily obtained fromsuppliers and others.1.4 In case of personal accident with this material,applyappropriate first aid;telephone the nearest Poison ControlCenter for assistance,and get medical attention immediately.2.Referenced Documents2.1 ASTM Standards:D 501 Test Methods of Sampling and Chemical Analysis ofAlkaline Detergents23.Chemical Composition3.1 Soda ash,after drying for 1 h at 155C,shall conform tothe following requirements as to chemical composition:Total alkalinity,calculated as Na2CO3,min,%99.26Sodium bicarbonate(NaHCO3),max,%0.5Matter insoluble in water,max,%0.254.Loss on Heating4.1 At the place of manufacture the loss in weight onheating 2 g of the material at 150 to 155C for 1 h shall notexceed 1%.4.1.1 When the sample is taken at other than the place ofmanufacture,it shall be recognized that the soda ash ishygroscopic.Hence from the percentage loss in weight onheating,there shall be deducted the percentage gain in netweight of the package as sampled over the net shipping weightto arrive at the percentage loss in weight on heating at the placeof manufacture.5.Type5.1 Soda ash shall be designated on the basis of the densityas received,as shown in Table 1.6.Ordering Information6.1 Unless otherwise specified in the contract,soda ash shallbe purchased by net weight as packed at the place of manu-facture.7.General Requirements7.1 Soda ash shall be a high-grade anhydrous sodiumcarbonate in powdered form and shall be of the type specifiedby the purchaser.NOTE1This specification covers the 58%(Na2O)grade of soda ash.8.Sampling and Analysis8.1 The material shall be sampled and analyzed in accor-dance with Test Methods D 501.9.Packaging and Labeling9.1 The material shall be packaged and labeled in confor-mity with local,state,and federal requirements.1This specification is under the jurisdiction ofASTM Committee D-12 on Soapsand Other Detergents and is the direct responsibility of Subcommittee D12.14 onSpecifications for Analysis of Inorganic Alkaline Detergents.Current edition approved May 31,1985.Published July 1985.Originallypublished as D 458 37 T.Last previous edition D 458 74(1983).2Annual Book of ASTM Standards,Vol 15.04.1Copyright ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connectionwith any item mentioned in this standard.Users of this standard are expressly advised that determination of the validity of any suchpatent rights,and the risk of 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 five 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 Headquarters.Your comments will receive careful consideration at a meeting of the responsibletechnical committee,which you may attend.If you feel that your comments have not received a fair hearing you should make yourviews known to the ASTM Committee on Standards,100 Barr Harbor Drive,West Conshohocken,PA 19428.This standard is copyrighted by ASTM,100 Barr Harbor Drive,West Conshohocken,PA 19428-2959,United States.Individualreprints(single or multiple copies)of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website(http:/www.astm.org).TABLE 1 TypeApparentVolume of30 g,mLApparentDensity,lb/ft3minmaxminmaxLight50652937D 4582