Platinum oxide (CAS RN 12035-82-4) fixed on a porous support of aluminium oxide (CAS RN 1344-28-1), containing by weight:<br> <br><br><br>- 0,1 % or more but not more than 1 % of platinum, and<br> <br><br><br>- 0,5 % or more but not more than 5 % of ethylaluminium dichloride (CAS RN 563-43-9)<br>
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