ASTM_D_538_-_85_1997.pdf

Designation:D 538 85(Reapproved 1997)Standard Specification forTrisodium Phosphate1This standard is issued under the fixed designation D 538;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.Trisodium Phosphate3.1 Trisodium phosphate shall be a white,uniform productin one of the following types,as specified by the purchaser:Type IAnhydrous powder or granules.Type IIGranular material corresponding approximately tothe formula Na3PO4H2O.Type IIIFlake or crystalline material corresponding ap-proximately to the formula Na3PO412H2O.4.Ordering Information4.1 Trisodium phosphate shall be purchased by net weight,but in the event of weight shortage it shall be recognized thattrisodium phosphate is subject to a possible gain or loss ofweight due to atmospheric or storage conditions,or both.Therefore the calculation of net weight shall be based upon aproduct containing 97%of trisodium phosphate(calculatedfrom the determined P2O5as Na3PO4for Type I,as Na3PO4H2O for Type II,or as Na3PO412H2O for Type III).The netweight of the material to be paid for shall be calculated asfollows:W 5R 3 T!/97(1)where:W 5 net weight of the material to be paid for,R5 net weight of material as received,andT5 total trisodium phosphate calculated as Na3PO4forType I,as Na3PO4H2O for Type II,or as Na3PO412H2O for Type III.4.2 In the event that the calculation under 4.1 results in afigure greater than 100%,the seller waives the right to invoicethe purchaser for any amount in excess of 100%.5.Chemical Composition5.1 Trisodium phosphate,as received,shall conform to therequirements for chemical composition given in Table 1.6.Sampling and Testing6.1 The material shall be sampled and analyzed in accor-dance with Test Methods D 501.1This specification is under the jurisdiction of the ASTM Committee D-12 onSoaps and Other Detergents and is the direct responsibility of Subcommittee D12.14on Specifications for Analysis of Inorganic Alkaline Detergents.Current edition approved May 31,1985.Published June 1985.Originallypublished as D 538 39.Last previous edition D 538 60(1980).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 Chemical RequirementsType IType IIType IIIminmaxminmaxminmaxTrisodium phosphate:Calculated as Na3PO4fromP2O5%97.Calculated as Na3PO4H2Ofrom P2O5,%.97.Calculated as Na3PO4,12H2O5,from P2O5%.97.Total alkalinity to methyl orange,as Na2O,%364032371619Phosphoric anhydride(P2O5),%39.5.36.0.18.1.Matter insoluble in water,%.0.1.0.1.0.1D 5382