Shipping chemicals and dangerous goods (ADR) from Spain by road

ADR is the European Agreement concerning the International Carriage of Dangerous Goods by Road. It is the rulebook every road carrier in Europe works to when a load is classified as dangerous: how goods are classified, packaged, marked, labelled and documented, how vehicles are equipped and placarded, and how drivers must be trained. It applies across the EU and most neighbouring states, so a single set of rules follows your load from a Spanish factory gate to a consignee in Germany, France, Italy or beyond.

The agreement is restructured and reissued on a two-year cycle, which is why packing instructions and special provisions occasionally change. The principle underneath does not: the goods are classified once, by the party that knows them best, and every downstream control — packaging, labels, the transport document, the vehicle — flows from that classification.

ADR is not customs and it is not product compliance. A chemical can be perfectly legal to sell and still be dangerous to transport. ADR only answers one question: how this substance moves safely on a public road.

Dangerous goods are sorted into nine classes by the primary hazard they present. Class 1 is explosives. Class 2 is gases (flammable, non-flammable and toxic sub-divisions). Class 3 is flammable liquids — solvents, paints, coatings, alcohols, many fuels. Class 4 covers flammable solids and related reactive solids (4.1, 4.2, 4.3). Class 5 is oxidising substances and organic peroxides (5.1, 5.2). Class 6 is toxic and infectious substances (6.1, 6.2). Class 7 is radioactive material. Class 8 is corrosives — industrial acids, bases, electrolytes. Class 9 is a catch-all for miscellaneous dangerous goods, including lithium batteries and environmentally hazardous substances.

Most chemical exports from Spain sit in classes 3, 8 and 9, with 5.1 and 6.1 appearing regularly in the industrial and agrochemical space. Each class is then refined by a Packing Group (I, II or III) that signals the degree of danger within the class — Packing Group I being the most hazardous. The class plus the Packing Group, together with the UN number, is what determines almost everything about how a load is handled.

A single product can carry a subsidiary hazard as well as its primary one. A corrosive that is also toxic, for example, will show both labels. This matters for segregation later, which is why the full classification — not just the headline class — belongs on your paperwork from the start.

We handle certified packaged dangerous goods in classes 2, 3, 4.1, 5.1, 6.1, 8 and 9. We have a Dangerous Goods Safety Adviser (DGSA) on staff and our drivers on these lanes hold the relevant ADR training certificate. That combination is what lets us accept a hazardous load, build the transport document correctly, run the segregation check and assign a driver who is legally permitted to carry it.

We do not carry Class 1 (explosives) or Class 7 (radioactive). These sit outside our certification and our equipment, and we will say so immediately rather than quote and disappoint. If your load contains either, you need a specialist carrier for that class.

Our scope is packaged goods — drums, jerricans, IBCs, boxed inner packagings — not bulk tanker movements. We move ambient and dry freight only; we do not operate reefer or temperature-controlled equipment, so any chemical that needs active temperature control during transit is not a fit for us.

For the quick at-a-glance version of which classes fit and which do not, see the companion ADR overview linked at the end of this guide.

Most packaged ADR freight in our certified classes is groupage-eligible: it consolidates with other Spain-origin loads on our scheduled departures, three times a week on the main corridors. What decides whether yours can share a trailer comes down to three things — segregation, quantity, and placarding.

Segregation is the first filter. ADR sets out which classes may not travel together. A Class 8 corrosive and a Class 5.1 oxidiser, for instance, generally cannot share load space without separation. Before any hazardous load joins a departure, our DGSA-supervised dispatch runs a segregation check against everything else already on that trailer. If your goods clash with the rest of the consolidation, they move on a different departure or, if volumes warrant, dedicated.

Quantity is the second. ADR uses transport-category thresholds (the well-known '1,000-point' calculation) above which a movement attracts the full set of vehicle and driver controls and may stop being practical to consolidate. Large drum or IBC volumes of a higher-hazard Packing Group tip a load toward a dedicated movement; smaller boxed quantities sit comfortably in groupage.

Placarding is the third. A fully regulated load above the thresholds requires the vehicle to display class placards and orange plates, which constrains what else can travel on that trailer and which routes — including ADR tunnel category restrictions — it can take. A dedicated movement removes the segregation puzzle entirely: you pay for the whole trailer, but the load travels on its own terms. We will tell you which way your specific load falls when we quote it.

Spain has one of Europe's larger chemical industries, and much of it is concentrated in Catalonia — above all the petrochemical and specialty-chemical cluster around Tarragona, one of the densest in southern Europe, supported by further production across the Barcelona industrial belt. That puts a great deal of ADR-relevant cargo within easy reach of our hub at Castellar del Vallès, near Barcelona.

For exporters in and around that cluster, the practical advantage is short, predictable first-mile collection onto scheduled Spain-origin departures, with the dangerous-goods file held by an operator certified for your class rather than passed down a longer chain of hands. The Cluj-Napoca hub extends the same handling east toward Romania and central Europe.

None of this changes the rules — ADR is ADR wherever the load starts — but proximity to a Spain-origin operator that is certified for your class shortens the chain and keeps the dangerous-goods file with the people coordinating the movement, whether the truck runs on owned or partner equipment.

Two companion guides go deeper on specific corners of this topic so this cornerstone does not repeat them. The ADR overview is the quick reference for exactly which classes we accept and what to supply for a booking. The lithium-battery guide handles the Class 9 specifics — UN numbers, packing instructions, terminal protection and tunnel routing — that have their own rules beyond the general framework above.

If your enquiry is mainly about how transport price is built from weight and dimensions rather than the hazard itself, the chargeable-weight guide explains how a load is rated, which applies to ADR freight as much as to general cargo. When you are ready, the quote page returns a firm written ADR price, typically in 15 to 20 minutes and valid for 24 hours.

Lead with the UN number and the class. Those two fields tell us immediately whether the load is in our certified scope, what it can and cannot share a trailer with, and which driver and equipment to assign. Almost every avoidable delay on a hazardous quote comes from those two being missing.

Alongside them, send the proper shipping name and Packing Group, the package type and size (so we can check whether Limited Quantities applies), the number of packages and net quantity per UN number, and the SDS itself. Flag any subsidiary hazard and any damaged or defective material, which can carry stricter rules.

With that in hand, dispatch confirms scope, runs the segregation check against the relevant departure and returns a firm written quote. Class 1 and Class 7 aside, if it is packaged dangerous goods in classes 2, 3, 4.1, 5.1, 6.1, 8 or 9, send the UN number and class and we will tell you exactly how it moves.