ISO INTERNATIONAL STANDARD 21869 Second edition 2022-06 Rubber compounding ingredients Magnesium oxide Methods of test Ingredients de mélange du caoutchouc - Oxyde de magnésium - Methodesd'essai Reference number IS0 21869:2022(E) ISO @IS02022 IS0 21869:2022(E) COPYRIGHT PROTECTED DOCUMENT @ISO2022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, withoutpriorwrittenpermission.Permission can berequestedfrom eitherIso at theaddress below orIso'smemberbodyinthecountryoftherequester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2022 - All rights reserved