ASTM_C_225_-_85_2014.pdf

Designation:C22585(Reapproved 2014)Standard Test Methods forResistance of Glass Containers to Chemical Attack1This standard is issued under the fixed designation C225;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()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 These test methods cover the evaluation of the resis-tance of glass containers to chemical attack.Three test methodsare presented,as follows:1.1.1 Test Method B-A covers autoclave tests at 121C onbottles partially filled with dilute acid as the attacking medium.1.1.2 Test Method B-W covers autoclave tests at 121C onbottles partially filled with distilled water as the attackingmedium.1.1.3 Test Method P-W covers autoclave tests at 121C onpowdered samples with pure water as the attacking medium.1.2 The values stated in SI units are to be regarded as thestandard.The values in parentheses are for information only.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A569/A569M SpecificationforSteel,Carbon(0.15Maximum,Percent),Hot-Rolled Sheet and Strip Commer-cial3D1125 Test Methods for Electrical Conductivity and Resis-tivity of WaterD1193 Specification for Reagent WaterE11 Specification for Woven Wire Test Sieve Cloth and TestSievesE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3.Significance and Use3.1 The solubility of glass in contact with food,beverages,or pharmaceutical products is an important consideration forthe safe packaging and storage of such materials.Autoclaveconditions are specified since sterilization is often employedfor the packaging of the product.It also represents one of themost extreme conditions,particularly of temperature,thatcontainers will ordinarily experience.Any of the three testmethods described may be used to establish specifications forconformity to standard values,either as specified by acustomer,an agency,or“The United States Pharmacopeia:”3.1.1 Test Method B-A is intended particularly for testingglass containers primarily destined for containment of productswith a pH under 5.3.1.2 Test Method B-W is intended particularly for testingglass containers to be used for products with a pH of 5.0 orover.3.1.3 Test Method P-W is a hydrolytic autoclave test primar-ily intended for evaluating samples from untreated glasscontainers.It is often useful for testing the resistance ofcontainers of too small capacity to permit measurements ofsolubility on the unbroken article by the B-W test method.Yielding the water resistance of the bulk glass,it can also beused in conjunction with the B-W test method to distinguishwhether the internal surface of a container has been treated toimprove its durability.3.2 All three test methods are suitable for specificationacceptance.4.Purity of Reagents4.1 Reagent grade chemicals shall be used in all tests.Unless otherwise indicated,it is intended that all reagents shall1These test methods are under the jurisdiction of ASTM Committee C14 onGlass and Glass Products and are the direct responsibility of Subcommittee C14.02on Chemical Properties and Analysis.Current edition approved Oct.1,2014.Published October 2014.Originallyapproved in 1949.Last previous edition approved 2009 as C225 85(2009).DOI:10.1520/C0225-85R14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Withdrawn.The last approved version of this historical standard is referencedon www.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 conform to the specifications of the Committee on AnalyticalReagents of the American Chemical Society,where suchspecifications are available.4Other grades may be used,pro-vided it is first ascertained that the reagent is of sufficientlyhigh purity to permit its use without lessening the accuracy ofthe determination.4.2 Unless otherwise indicated,references to water shall beunderstood to mean distilled water or other water meeting therequirements for one of the types of reagent water covered bySpecification D1193.TEST METHOD B-ARESISTANCE OF BOTTLESTO ATTACK BY DILUTE ACID5.Apparatus5.1 Autoclave or Steam Sterilizer,capable of withstanding apressure of 165 kPa(24 psi)and,preferably,equipped with aconstant-pressure regulator or other means for maintaining thetem