![\"\"](\"https:\/\/it.greenchem-adblue.com\/wp-content\/uploads\/2025\/12\/image.png\")
<\/figure>\n\n\n\nAdBlue\u00ae Freezing Point<\/h2>\n\n\n\n
AdBlue\u00ae is a solution of high-purity urea (32.5%) and demineralized water (67.5%), compliant with the ISO 22241 standard. This concentration ensures effective NOx reduction and lowers the freezing point of the mixture, which begins to gradually solidify around -5\u00b0C and becomes completely solid at around -11\u00b0C, the so-called eutectic point.<\/p>\n\n\n\n
The Consequences of System Blockage<\/h2>\n\n\n\n
When AdBlue\u00ae freezes, the increase in volume (~7%) can cause structural problems in unsuitable containers. However, the greatest risk is operational:<\/p>\n\n\n\n
- \n
- SCR System Blockage: Freezing in the tank and supply lines prevents the solution from being injected, effectively blocking the emissions control system.<\/li>\n\n\n\n
- Activation of Limp Mode (Reduced Power): Modern vehicles detect this immediately. The on-board electronics activate a safety mode (“Limp Mode”) that drastically limits the vehicle’s power and speed.<\/li>\n\n\n\n
- Warnings and countdown timers: Warning lights (AdBlue\u00ae system fault) appear on the dashboard of modern vehicles. If left untreated, the vehicle may activate a countdown timer that, once reset, prevents the engine from restarting.<\/li>\n\n\n\n
- Fault symptoms: An engine that shudders at idle, hesitates when accelerating, or emits black smoke from the exhaust are signs that the SCR system is not working due to blocked AdBlue\u00ae.<\/li>\n<\/ol>\n\n\n\n
Prevention and solutions: maintaining efficiency<\/h2>\n\n\n\n
Newer-generation vehicles are equipped with heating elements integrated into the tank and fuel lines, designed to thaw the solution and return it to a liquid state. However, in extremely cold conditions or if these heaters fail, preventative and corrective measures are essential. Some products on the market promise to reduce the freezing point of AdBlue\u00ae through the addition of specific additives. However, it is necessary to verify whether and how these solutions comply with international standards ISO 22241, which are essential to ensure the safety and optimal performance of the fluid. For this reason, it is crucial to be careful and choose only certified products, avoiding risks to the vehicle and the environment.<\/p>\n\n\n
\n![\"Adblue\u00ae\u00a0e](\"https:\/\/it.greenchem-adblue.com\/wp-content\/uploads\/2025\/12\/shutterstock_2371145979-scaled.jpg\")
<\/figure>\n<\/div>\n\n\n1. Proper Thawing:<\/h3>\n\n\n\n
If AdBlue\u00ae is frozen:<\/p>\n\n\n\n
- \n
- Natural Thawing: The safest solution is to park the vehicle in a heated environment (such as a garage or shed) and allow the AdBlue\u00ae to re-liquidate naturally.<\/li>\n\n\n\n
- Avoid Direct Heat: Do not use open flames, heat guns, or other artificial heat sources to speed up the process, as this could damage the solution or the tank components.<\/li>\n<\/ul>\n\n\n\n
It is important to note that AdBlue\u00ae, once thawed and re-liquidated, does not suffer any loss of quality or concentration, provided it has not been contaminated.<\/p>\n\n\n\n
2. Conservation and Storage<\/h3>\n\n\n\n
For professionals storing large quantities of AdBlue\u00ae:<\/p>\n\n\n\n
- \n
- Protected Environments: Always store the additive in environments with temperatures between -5\u00b0C and +25\u00b0C.<\/li>\n\n\n\n
- Partial filling: When anticipating extreme temperatures, avoid completely filling storage containers to allow for 7% volumetric expansion in the event of freezing.<\/li>\n<\/ul>\n\n\n\n
Proper management of AdBlue\u00ae during the winter months is crucial to maintaining the efficiency of vehicles equipped with SCR systems. With the risk of the additive freezing at temperatures below -11\u00b0C, it is essential to take preventative measures, such as using in-vehicle heaters. Furthermore, proper storage and conservation of AdBlue\u00ae, in protected environments and at appropriate temperatures, helps prevent damage to tanks and system components. By adopting these practices, industry professionals and diesel vehicle owners can ensure their vehicles are always operational, minimizing maintenance costs and ensuring compliance with environmental regulations.<\/p>\n\n\n\n
FAQ<\/h3>\n\n\n\n
At what temperature does AdBlue\u00ae freeze?
<\/strong>AdBlue\u00ae freezes at around -11\u00b0C. Winter temperatures, especially at night, can regularly drop below this threshold.<\/p>\n\n\n\nCan I drive with frozen AdBlue\u00ae?
<\/strong>If AdBlue\u00ae is frozen, the SCR system cannot function properly. In modern vehicles, the electronics can activate a safety mode (Limp Mode) that temporarily limits the vehicle’s power and speed to protect the engine and emissions system. The ability to restart the engine depends on the model: in some cases, the vehicle continues to run, while in others, it may require the AdBlue\u00ae to thaw before restarting.<\/p>\n\n\n\nHow long does it take to thaw AdBlue\u00ae?
<\/strong>It depends on the conditions: in a heated garage, 2-4 hours may suffice. Outdoors, in the sun, it can take 4-8 hours. If the vehicle is equipped with functioning tank heaters, the time is significantly reduced.<\/p>\n\n\n\nWill the engine be damaged if AdBlue\u00ae freezes?
<\/strong>No. Freezing AdBlue\u00ae does not cause direct or permanent damage to the engine. The only component that is blocked is the SCR exhaust gas aftertreatment system. Once thawed, the system resumes normal operation.<\/p>\n","protected":false},"excerpt":{"rendered":"AdBlue\u00ae, a crucial component for the operation of Selective Catalytic Reduction (SCR) systems in diesel engines, is essential for reducing nitrogen oxides (NOx). However, its water-based nature raises a recurring concern as cold weather approaches: the risk of freezing. Understanding the composition of this additive, its freezing point, and preventative measures is essential to ensuring … Continued<\/a><\/p>\n","protected":false},"author":1094,"featured_media":51851,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Tips To Prevent AdBlue Freezing In Winter Times","_seopress_titles_desc":"Learn how to prevent AdBlue freezing and keep your diesel engine efficient. Avoid SCR blockages and costly downtime with proper storage.","_seopress_robots_index":"","footnotes":""},"categories":[1191,1437],"tags":[],"class_list":["post-51993","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-adblue_greenchem-en-gb-2","category-greenchem-en-gb"],"acf":[],"_links":{"self":[{"href":"https:\/\/greenchemstaging.maarevenonline.nl\/en-gb\/wp-json\/wp\/v2\/posts\/51993","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/greenchemstaging.maarevenonline.nl\/en-gb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/greenchemstaging.maarevenonline.nl\/en-gb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/greenchemstaging.maarevenonline.nl\/en-gb\/wp-json\/wp\/v2\/users\/1094"}],"replies":[{"embeddable":true,"href":"https:\/\/greenchemstaging.maarevenonline.nl\/en-gb\/wp-json\/wp\/v2\/comments?post=51993"}],"version-history":[{"count":2,"href":"https:\/\/greenchemstaging.maarevenonline.nl\/en-gb\/wp-json\/wp\/v2\/posts\/51993\/revisions"}],"predecessor-version":[{"id":51999,"href":"https:\/\/greenchemstaging.maarevenonline.nl\/en-gb\/wp-json\/wp\/v2\/posts\/51993\/revisions\/51999"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/greenchemstaging.maarevenonline.nl\/en-gb\/wp-json\/wp\/v2\/media\/51851"}],"wp:attachment":[{"href":"https:\/\/greenchemstaging.maarevenonline.nl\/en-gb\/wp-json\/wp\/v2\/media?parent=51993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/greenchemstaging.maarevenonline.nl\/en-gb\/wp-json\/wp\/v2\/categories?post=51993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/greenchemstaging.maarevenonline.nl\/en-gb\/wp-json\/wp\/v2\/tags?post=51993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}