ASTM_D_595_-_85_1997.pdf

Designation:D 595 85(Reapproved 1997)Standard Specification forTetrasodium Pyrophosphate(Anhydrous)1This standard is issued under the fixed designation D 595;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 for tetrasodium pyrophosphate(anhy-drous)covers material suitable for various washing,cleaning,and scouring processes,with soap or other detergents where amildly alkaline material,with appreciable water softeningproperties,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.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 Tetrasodium pyrophosphate(anhydrous)shall be awhite,uniform product in either granular,powdered,or flakeform,as specified by the purchaser.4.Ordering Information4.1 Tetrasodium pyrophosphate(anhydrous)shall be pur-chased by net weight.When,however,due to hygroscopicitythe tetrasodium pyrophosphate content is less than 97.5%,acorresponding gain in weight of the package shall be expected,and the net weight shall be based on a product containing97.5%of tetrasodium pyrophosphate.The net weight of thematerial to be paid for shall be calculated as follows:W 5R 3 T!/97.5(1)where:W 5 weight of the material to be paid for,R5 net weight of material as received,andT5 total tetrasodium pyrophosphate calculated as percent-age of Na4P2O7.4.2 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 Tetrasodium pyrophosphate(anhydrous),as received,shall conform to the requirements as to chemical compositionprescribed in Table 1.6.Sampling and Analysis6.1 The material shall be sampled and analyzed in accor-dance with Test Methods D 501.7.Rejection7.1 Material which has picked up sufficient water,as indi-cated by loss on ignition,to reduce the tetrasodium pyrophos-phate content to 95%or lower,may be rejected at the optionof the purchaser.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 595 40.Last previous edition D 595 45(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 RequirementsTetrasodium pyrophosphate calculated as Na4P2O7,min,%97.5AMatter insoluble in water,max,%0.2AWhen the sample is taken at other than the place of manufacture,it shall berecognized that tetrasodium pyrophosphate(anhydrous)is slightly hygroscopic.Inthe case of shipments in which the tetrasodium pyrophosphate content is less than97.5%,reference should be made to Section 6.D 595