A spontaneous update to the lead registration of manganese sulphate has been submitted to ECHA on 24th September 2021.  

Recent ECHA correspondences from co-registrants highlighted the following life-cycle stages in the existing CSR not to meet ECHA’s requirements, hence a CSR update was NECESSARY.  

Consumer uses: Consumer use of fertiliser products - PC 12: Fertilisers 

To address this, the updated CSR has been prepared using CHESAR v3.6. and this use presented a challenge because the derived no effect levels (DNELs) for this substance are very low and for consumer exposure it is not possible (according the ECHA guidance) to rely on the use of personal protective equipment (PPE) to control exposure. Hence the exposure assessment for human health could only pass by amending the concentration of MnSO4 in products that are intended for consumer use.  

Therefore, the maximum concentration of MnSO4 for consumer safe use of fertiliser products is 12.5%. Products containing MnSO4 above this concentration will therefore unfortunately not be supported by this chemical safety report*.  

The full list of life-cycle stages covered by the updated CSR is unchanged from the previous version but there is a restriction on the concentration of the MnSO4 in fertilisers - max 12.5% above which the use falls under uses advised against.

​Registrants with uptodate LoA payments, and supplying >10tpa should  request the new updated CSR from reach@manganese.org and  carefully check to ensure that their use of the substance falls within the scope of the exposure scenarios provided for these life-cycle stage.