Second Delphi results: clarification of SbD, exposure and toxicology. In this section the graphics and selected analyses of the data and comments for each of the questions are presented. Similar to the first round, the full printout of SciPinion graphics for the responses are provided in Appendix 8. In the second round of the Delphi web forum participants made use of the open text fields following the questions to provide detail on their response choices. As a result of this there were over 40 comments provided for each question, with some questions having up to 80 comments. These comments were collated to allow for a qualitative analysis to identify the main opinions and perceptions of participants. A summary of this narrative has been inserted following each of the graphics below. Do you agree that safe by design practices are already in place for medical, food additive, or food packaging uses of nanomaterials? As can be seen in Figure 20 the majority of participants have identified that for food packaging and medical applications SbD is in place, but requires more attention. The response for food additives was somewhat more of a split between those indicating that SbD is in place and not in place. Figure 20 Do you agree that safe by design practices are already in place for medical, food additive, or food packaging uses of nanomaterials? The comments provided in the free text field alongside this question support this view, as it was clear there is uncertainty about the extent to which SbD is in place for medical, food additive and food packaging. One of the main reasons reported for this uncertainty was the lack of standardisation of the methods and practices. This lack of availability of standardised methods was reported as a contributing factor for the implementation of practices not being thorough enough when being applied. Participants suggested that this will result in inconsistencies. These inconsistencies were identified as occurring along the life cycle in how and what practices are applied, but also inconsistencies in how these are applied within and between countries. Participants suggested that there is a need for more knowledge in order to increase certainty and consistency in SbD practices. Along with this knowledge, it was identified that there is a need for a system or environment in which this knowledge can be shared and discussed by different stakeholders. Knowledge gaps in relation to food packaging were a specific concern identified by participants. The knowledge gaps identified by participants focusse...
