Table 3 Bioaccumulation metrics and corresponding scores indicating bioaccumulation potential. The composite bioaccumulation score \({S}_{stock(bio)}\) is the average of the scores assigned to the available bioaccumulation metrics
From: Scoring scheme for Comparative Ranking of impact potential of chemical Alternatives (SCoRA)
Level of concern | BCF | BMF | Log Kow | Log Koa (and log Kow > 2)* | Accumulation related to protein binding** | Elimination half-life [d] incl. metabolism*** | Score |
|---|---|---|---|---|---|---|---|
Very low |  < 100 |  < 0.01 |  < 1 |  < 1 | no | – | 1 |
Low | 100–< 1000 | 0.01–< 0.1 | 1–< 2 | 1–< 4 | – |  < 70 | 2 |
Moderate | 1000–< 2000 | 0.1–< 1 | 2–< 3 | 4–< 5 | – | – | 3 |
High | 2000–< 5000 | 1–< 2 | 3–< 4.5 | 5–< 10 | – |  ≥ 70 | 5 |
Very high |  ≥ 5000 |  ≥ 2 |  ≥ 4.5 |  ≥ 10 | yes | – | 10 |