{"id":104988,"date":"2021-06-30T14:02:08","date_gmt":"2021-06-30T13:02:08","guid":{"rendered":"https:\/\/www.crownoil.co.uk\/?page_id=104988"},"modified":"2025-08-14T14:00:11","modified_gmt":"2025-08-14T13:00:11","slug":"adblue-iso-22241","status":"publish","type":"page","link":"https:\/\/www.crownoil.co.uk\/fuel-specifications\/adblue-iso-22241\/","title":{"rendered":"AdBlue\u00ae Specifications: ISO 22241"},"content":{"rendered":"\n
\n

Specifications for ISO 22241 AdBlue\u00ae<\/h2>\n\n\n\n

Aqueous urea solution 32.5%, more simply AUS 32 DEF, or AdBlue\u00ae<\/a>, is manufactured to meet ISO 22241 standards to enable use in modern diesel engines.<\/p>\n\n\n\n

AdBlue\u00ae is a registered trademark of the German Association of the Automobile Industry (VDA<\/a>).<\/p>\n<\/div>\n\n\n\n

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ISO 22241 specifications: Physical and chemical properties of AdBlue\u00ae<\/h2>\n\n\n\n

In order to be used in Euro 6<\/a> diesel engines, AdBlue\u00ae needs to meet the BS ISO 22241 specifications, which means it has the below physical properties and chemical properties.<\/p>\n<\/div>\n\n\n\n

\n
Property<\/th>Units<\/th>Specification<\/th>Test Method<\/th><\/tr><\/thead>
Urea content<\/td>% (m\/m)<\/td>31.8, 33.2<\/td>ISO 22241-2 Annex B
ISO 22241-2 Annex C<\/td><\/tr>
Density @ 20\u00baC<\/td>g\/cm3<\/td>1.0870, 1.0930<\/td>ISO 12185<\/td><\/tr>
Refractive Index 20\u00baC<\/td>–<\/td>1.3814, 1.3843<\/td>ISO 22241-2 Annex C<\/td><\/tr>
Alkalinity (NH3)<\/td>%<\/td>\u22640.2<\/td>ISO 22241-2 Annex D<\/td><\/tr>
Biuret<\/td>%<\/td>\u22640.3<\/td>ISO 22241-2 Annex E<\/td><\/tr>
Aldehydes<\/td>mg\/kg<\/td>\u22645<\/td>ISO 22241-2 Annex F<\/td><\/tr>
Insoluble Matter<\/td>mg\/kg<\/td>\u226420<\/td>ISO 22241-2 Annex G<\/td><\/tr>
Phosphate (en PO43-)<\/td>mg\/kg<\/td>\u22640.5<\/td>ISO 22241-2 Annex H<\/td><\/tr>
Calcium<\/td>mg\/kg<\/td>\u22640.5<\/td>ISO 22241-2 Annex I<\/td><\/tr>
Iron<\/td>mg\/kg<\/td>\u22640.5<\/td>ISO 22241-2 Annex I<\/td><\/tr>
Copper<\/td>mg\/kg<\/td>\u22640.2<\/td>ISO 22241-2 Annex I<\/td><\/tr>
Zinc<\/td>mg\/kg<\/td>\u22640.2<\/td>ISO 22241-2 Annex I<\/td><\/tr>
Chromium<\/td>mg\/kg<\/td>\u22640.2<\/td>ISO 22241-2 Annex I<\/td><\/tr>
Nickel<\/td>mg\/kg<\/td>\u22640.2<\/td>ISO 22241-2 Annex I<\/td><\/tr>
Magensium<\/td>mg\/kg<\/td>\u22640.5<\/td>ISO 22241-2 Annex I<\/td><\/tr>
Sodium<\/td>mg\/kg<\/td>\u22640.5<\/td>ISO 22241-2 Annex I<\/td><\/tr>
Potassium<\/td>mg\/kg<\/td>\u22640.5<\/td>ISO 22241-2 Annex I<\/td><\/tr>
Aluminium<\/td>mg\/kg<\/td>\u22640.5<\/td>ISO 22241-2 Annex I<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n\n
\n

The above are typical figures; we reserve the right to alter the specification without notice. Nothing on this specification constitutes a guarantee.<\/em><\/p>\n<\/div>\n\n\n\n

\n
Download AdBlue\u00ae Specifications as a PDF<\/a><\/div>\n<\/div>\n\n\n\n
\n

All DEF supplied by Crown Oil meets the required standards.<\/p>\n<\/div>\n\n\n\n

\n
\n

If you have further questions about AdBlue\u00ae or would like to place an order for any of our fuels. Call our fuel specialists today on 0330 123 1444<\/a> to learn more and discuss your requirements.<\/strong><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"parent":104168,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-104988","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"\nAdBlue\u00ae Specifications - ISO 22241 Standards | Crown Oil<\/title>\n<meta name=\"description\" content=\"AUS 32 Diesel Engine Fluid (AdBlue\u00ae) must meet ISO 22241 specifications in order to be used in Euro 6 diesel engines. 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