ASTM_D_5653_-_95_2000.pdf

Designation:D 5653 95(Reapproved 2000)Standard Specification forCopper Dimethyldithiocarbamate1This standard is issued under the fixed designation D 5653;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 The values stated in SI units are to be regarded as thestandard.2.Referenced Documents2.1AWPA Standards:AWPA A 9 Analysis of Treated Wood and Treating Solu-tions by X-Ray Spectroscopy2AWPAA 25 Method of Analysis of Copper Dimethyldithio-carbamate(CDDC)Treated Wood by Colorimetry23.Composition and Properties3.1 Copper dimethyldithiocarbamate(CDDC),formed inthe wood,shall be a reaction product resulting from the dualtreatment of two separate treating solutions,the first treatingsolution containing bivalentcopper ethanolamine(2-aminoethanol)and the second treating solution containingsodium dimethyldithiocarbamate.3.2 The analytical composition of the components present inthe two treating solutions shall be maintained at concentrationsthat will result in the treated wood retaining average weightratios of components varying within the limits specified inTable 1.3.3 The treating solution used for the first treatment of thedual treatment shall contain bivalent copper derived fromcopper ethanolamine complex dissolved in water.The weightratio of ethanolamine to bivalent copper in the copper ethano-lamine treating solution shall be a minimum of 1.70 and theresulting complex shall be completely water soluble at 5C.3.4 The bivalent copper source may be cupric hydroxide,cupric oxide,basic cupric carbonate,or other copper sourcesother than cupric salts of mineral acids.The purity shall be inexcess of 95%on an anhydrous basis.3.5 The treating solution used for the second treatment ofthe dual treatment shall contain sodium dimethyldithiocarbam-ate dissolved in water.Sodium dimethyldithiocarbamate shallbe derived from material in excess of 95%purity on ananhydrous basis.3.6 The commercial preservative components for each ofthe treatments shall be labeled as to their total content of activeingredients.4.Chemical Analysis4.1 The preservative component elements shall be analyzedin accordance with test methods in AWPA Standard A 9.Thecopper dimethyldithiocarbamate chelate in the treated woodshall be analyzed in accordance with test methods in AWPAA25.5.Keywords5.1 copper dimethyldithiocarbamate;wood preservativeASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users 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 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 International Headquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,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-mail);or through the ASTM website(www.astm.org).1This specification is under the jurisdiction of ASTM Committee D-7 on Woodand is the direct responsibility of Subcommittee D07.06 on Treatments for WoodProducts.Current edition approved Jan.15,1995.Published March 1995.2Available from American Wood Preservers Association,PO Box 286,Wood-stock,MD 21163.TABLE 1 Specification for Copper DimethyldithiocarbamateFormed by Dual Treatment(CDDC)Weight RatioSodium Dimethyldithiocarbamate:CopperMinimumMaximum2.55.01Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.