How to remove right column from product details page in magento?

go to this directory app/design/frontend/base/default/layout/
open catalog.xml and search <label>Catalog Product View (Any)</label>
you can find this line around 180 line of this page

code will be like this


<catalog_product_view translate="label">
        <label>Catalog Product View (Any)</label>
        <!-- Mage_Catalog -->
        <reference name="root">
            <action method="setTemplate"><template>page/2columns-right.phtml</template></action>
        </reference>

change 2columns-right.phtml to 1column.phtml


 <catalog_product_view translate="label">
        <label>Catalog Product View (Any)</label>
        <!-- Mage_Catalog -->
        <reference name="root">
            <action method="setTemplate"><template>page/1column.phtml</template></action>
        </reference>

Refresh the cache and check will work successfully :)