Product updates on DOHSBase

The CMR classification now consolidates every source

Sat, 20 Jun 2026 00:00:00 +0000

On the hazard classification tab we show a substance’s CMR classification: carcinogenic (C), mutagenic (M) and reprotoxic (R). This now reflects DOHSBase’s complete determination across every source, instead of leaning on a single list.

This page describes a change to the product. If you are looking for an explanation of what CMR substances are, how to recognise them and what obligations they carry, start with CMR substances in the knowledge base.

Direct links to external sources per substance

Fri, 19 Jun 2026 00:00:00 +0000

Until now, under Additional information we linked to the home pages of external sources such as GESTIS and ECHA. You arrived at the source, but still had to look up the substance yourself.

From now on, where available, we show direct links to the right page for that specific substance:

the substance’s GESTIS substance card;
the substance’s ECHA REACH registration dossier;
the CLP Annex VI index number, shown as an identifier when there is no direct page for it.

You will find these links on the hazard classification tab, in the Additional information block. The general link to eChemPortal remains available. If a substance has no direct links (yet), we show the general links to the source websites as before.

The Sampling methods tab is back, alongside methods per limit value

Thu, 21 May 2026 00:00:00 +0000

In an earlier update we made the sampling methods in DOHSBase Online more precise: you saw the relevant methods per specific limit value of a substance. That is more accurate, because a method’s suitability depends on the limit value you assess against.

In practice this change proved too restrictive. Two groups of users lost track of the methods: those who did not notice that you first had to click a limit value, and those who were looking for the substance-wide overview, namely which methods exist for this substance, independent of a specific limit value.

‘Show all OELVs’ can now remember your preference

Tue, 19 May 2026 00:00:00 +0000

In a substance’s limit-value list, the Show all OELVs toggle reveals the full set of exposure limit values, including the entries that are hidden by default.

That toggle now stays on for the current session only by default. If you flip it once to take a look, your next visit starts in the default view again, so you are never unknowingly stuck in the expanded view.

Prefer to always work with every limit value in view? Tick the new Remember checkbox next to the toggle. The preference is then stored on that device and applies on your next visit too. Turning the toggle back off clears the stored preference automatically.

UVCB substances are now clearly flagged

Fri, 08 May 2026 00:00:00 +0000

Some substances are UVCBs: substances of Unknown or Variable composition, Complex reaction products or Biological materials. Examples include paraffin wax and petroleum fractions. For such substances, a molecular formula, molecular weight, melting and boiling point, and vapour pressure do not describe a discrete molecule but a range of compositions. The numbers are therefore approximate.

DOHSBase Online now makes this explicit:

A neutral UVCB chip appears next to the substance name, with a tooltip explaining what it means.
On the physical and chemical properties tab, molecular weight, melting point, boiling point and vapour pressure carry a ~ sign, with an explanatory note above the panel.
In DOHSBase Compare, Cmax, TIX and RAS for a UVCB are shown in italics with a ~. The limit value (OEL) is deliberately not marked as approximate: limit values are regulatory and do not depend on molecular composition.

UVCB is a normal regulatory category, not a warning. The cue is therefore neutral (a grey chip, a ~ sign) and is only meant to make clear what the displayed numbers mean.