Diisocyanate Workplace Limits to Halve by 2028 as Germany Moves to EU Standards
20.06.2026 - 01:20:51 | boerse-global.de
The German chemical industry is facing a tightening regulatory squeeze that will cut permissible exposure to diisocyanates nearly in half within three years. From 2029 onwards, the binding occupational exposure limit value (BOELV) for these compounds will drop from the current 10??g NCO/m³ to just 6??g NCO/m³. Until December 31, 2028, the 10??g standard remains in force, with a short-term exposure ceiling of twice that value allowed for 15?minute intervals.
That 2028 reduction is just one element of a broader alignment with European directives. By June 1, 2027, a total of 15 existing German workplace limit values must be brought into line with the indicative occupational exposure limit values (IOELVs) set by the EU. The technical groundwork is being laid by the Committee on Hazardous Substances (AGS), which in May 2025 approved sweeping revisions to several key technical rules for hazardous substances (TRGS). Among them are TRGS 507 and TRGS 610, the specific isocyanate rule TRGS 430, and the workplace limit value catalogs TRGS 900 and 903.
Dr. Stefan Engel of BASF SE, who chairs the AGS, and Dr. Maximilian Hanke?Roos of the BG RCI (the employers’ liability insurance association for the chemical industry) are steering the process.
With hazardous substance exposure limits tightening and new technical rules rolling out across Europe, UK employers handling reactive compounds like diisocyanates face similar compliance demands. Missing or outdated COSHH assessments leave businesses exposed to enforcement action and fines. A free COSHH Risk Assessment Toolkit provides 43 fully customisable templates, checklists, and toolbox talks to help you document hazardous substance risks and stay compliant with current regulations. Download the free COSHH Risk Assessment Toolkit
Protective measures must be upgraded across production and storage sites. Closed systems and local exhaust ventilation (LEV) are the central technical safeguards. Personal protective equipment now recommended includes nitrile gloves, safety goggles, and respiratory protection. Special attention is paid to reactive diisocyanates such as 2?isocyanatoethyl?2,6?diisocyanatohexanoate. Storage remains critical: diisocyanates require cool, dry, well?ventilated conditions and strict spatial separation from incompatible substances like water, alcohols, and amines. Specialized containment trays and sorbents are available on the market. Companies such as Makro Ident point to additional legal obligations under Germany’s Water Resources Act (WHG) and the Ordinance on Facilities for Handling Water-Hazardous Substances (AwSV). For structural corrosion protection, the AGI worksheet S?10?4, published in May 2026, provides detailed construction guidance for acid?resistant buildings.
Meanwhile, industry and research are accelerating efforts to replace diisocyanates altogether. The BioRUHM project (2022–2025), a collaboration including Fraunhofer IFAM and HOBUM Oleochemicals, has developed biobased, isocyanate?free hot?melt adhesives that reach up to 87?percent biogenic content. Market entry for these silane?modified adhesives is expected in three to four years. Covestro is pursuing a different route with its Bio4PurConti project, which aims to produce biobased aniline continuously. Aniline is a key precursor for MDI (methylene diphenyl diisocyanate), and a direct “drop?in” replacement would cut the carbon footprint without changing downstream chemistry.
Digital tools are also entering the safety arena. Redwood AI announced in mid?June 2026 a new AI?powered module for chemical risk assessment. The technology evaluates dual?use risks and optimizes synthetic route planning under safety constraints, offering companies a data?driven way to anticipate hazards before they reach the factory floor.
