The Tukes Category Report in iChemistry helps you assess whether your chemical storage volumes trigger legal obligations under Finnish law (VNa 685/2015), which implements the EU Seveso III Directive in Finland. The supervising authority is Tukes (Finnish Safety and Chemicals Agency).
Finnish law establishes four levels of obligation depending on how much hazardous chemicals you store. The report calculates your storage volumes against the thresholds for each level.
The Four Obligation Levels
| Column | Finnish term | Obligation |
|---|---|---|
| 1 | Ilmoitus | Notification — you must notify Tukes |
| 2 | Lupa | Permit — you must obtain a permit from Tukes |
| 3 | Toimintaperiaateasiakirja | You must have a safety principles document (lower Seveso site) |
| 4 | Turvallisuusselvitys | You must submit a full safety report (upper Seveso site) |
How the Report Works
The report generates three separate calculations — one each for Environmental (E), Health (H), and Physical (P) hazard categories. Each category is divided into subcategories based on CLP hazard classification and matched against the hazard classification in section 2 of each product's Safety Data Sheet.
Environmental (E)
- E1: Aquatic acute cat. 1 (H400) and aquatic chronic cat. 1 (H410) — thresholds: 1 / 10 / 100 / 200 tonnes
- E2: Aquatic chronic cat. 2 (H411) — thresholds: 5 / 50 / 200 / 500 tonnes
Health (H)
- H1: Acute toxicity cat. 1, all routes of exposure (H300, H310, H330) — thresholds: 0.1 / 2 / 5 / 20 tonnes
- H2: Acute toxicity cat. 2 and 3 by inhalation (H300, H310, H330, H331) — thresholds: 0.5 / 10 / 50 / 200 tonnes
- H3: Specific target organ toxicity, single exposure cat. 1 (H370) — thresholds: 0.5 / 10 / 50 / 200 tonnes
Physical (P)
- P1a–P8: Explosives, flammable gases, aerosols, flammable liquids, oxidising substances, pyrophoric substances, self-reactive substances and organic peroxides — thresholds vary by subcategory.
The Ratio Calculation (Suhdelukulaskenta)
The report uses a ratio-based aggregation method defined in Seveso III. This means that a legal obligation can arise even if no single subcategory exceeds its threshold — small amounts across multiple hazardous substances can add up to trigger an obligation.
For each obligation column, a total ratio is calculated by summing the quotient for each subcategory:
If the total ratio across all subcategories within a group (E, H, or P) exceeds 1, the obligation applies at that level. The report displays the calculated ratios alongside the thresholds for each group.
Known Limitations
1. Products without a stored quantity are included
Products that exist in the inventory but have no registered storage amount should not affect the calculation. If you see unexpected results, verify that storage amounts are correctly registered for all relevant products in iChemistry.
2. Annex 1, Part 2 (named substances) is not covered
The regulation includes a separate list of specifically named substances — such as chlorine, ammonia, methanol, hydrogen, and petroleum products — that have their own individual thresholds, sometimes significantly lower than the general category thresholds. The report does not currently account for these named substances. If your inventory includes any of them, you must assess those separately against the thresholds in Annex 1, Part 2 of VNa 685/2015.
3. A ratio above 1 is not clearly flagged
When a calculated ratio exceeds 1, a legal obligation has arisen — but the current report does not highlight this with a clear warning. Review the ratio figures carefully: any value above 1 in any column means the corresponding obligation applies to your site.
How to Use the Report
- Go to Reports -> Custom in iChemistry and open the Tukes Category Report.
- Select the department you want to assess. The report includes all products in that department and all sub-departments below it.
- Review the E, H, and P report sections separately.
- For each section, check whether any ratio value exceeds 1 under any of the four obligation columns.
- If a ratio exceeds 1, contact Tukes or your legal advisor to understand the steps required at that obligation level.
Important note
This report is an indicator tool and does not replace a complete legal assessment. Always verify your results against the full text of VNa 685/2015, including Annex 1 Part 2 (named substances), and consult Tukes or a qualified expert if you are unsure about your obligations. For more information, visit the Tukes website or the KemiDigi service.