1、Designation:D 594 85(Reapproved 1997)Standard Specification forSodium Sesquisilicate1This standard is issued under the fixed designation D 594;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 pare
2、ntheses 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 sodium sesquisilicate covers ma-terial suitable for various washing,cleaning,and scouringprocesses,with or without soap as condit
3、ions demand,andwhere a strongly alkaline 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
4、 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.Sodium Sesquisilicate3.1 Sodium sesquisilica
5、te shall be a light-colored,uniform,granular product and shall be furnished in airtight containers.4.Ordering Information4.1 Sodium sesquisilicate shall be purchased by net weight.5.Chemical Composition5.1 Sodium sesquisilicate,as received,shall conform to thefollowing requirements as to chemical co
6、mposition:Sodium sesquisilicate,calculated as 3Na2O2SiO211 H2O,min,%97.0Total alkalinity as Na2O,to methyl orange,%35.5 to 37.5Total silica as SiO2,min,%22.5Matter insoluble in water,max,%0.26.Sampling and Analysis6.1 The material shall be sampled and analyzed in accor-dance with Test Methods D 501.
7、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 infrin
8、gement 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by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or
9、 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 C
10、ommittee 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
11、610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website(http:/www.astm.org).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 I
12、norganic Alkaline Detergents.Current edition approved May 31,1985.Published July 1985.Originallypublished as D 594 40.Last previous edition D 594 41(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.
