Green Solvent Selection Map (2D)

Scoring Weights

Health weight 1.0

Safety weight 1.0

Environment weight 1.0

Reaction Polarity Filter

Plot Axes

Live Ranking

Top-ranked solvent

Water

Composite score (0–10)

10.0

In the green zone (≥7)

0 / 14

Green zone — score ≥ 7 (recommended) Yellow zone — 4 ≤ score < 7 (problematic) Red zone — score < 4 (substitute it)

How it works

Real green-solvent guides (CHEM21, GSK, Pfizer) score each candidate on independent 1–10 "greenness" axes and combine them with a weighted sum — this is a simplified version of that method, using representative literature-typical scores:

score = (wH·Health + wS·Safety + wE·Environment) / (wH + wS + wE)

Health — worker exposure hazard (higher = less toxic/CMR risk).
Safety — process hazard: flammability, peroxide formation, explosivity (higher = safer to handle).
Environment — persistence, aquatic toxicity, VOC/ozone impact (higher = lower footprint).

Each of the 14 solvents sits at (Health, Environment, Safety) in a 3-axis space, but a flat screen can only show two axes as a scatter plot at once — so this 2D version plots any two of the three raw axes you pick (Health–Environment by default) and encodes the third axis as the circle's radius (bigger circle = better on the hidden axis). Each dot is colour-coded by its current weighted composite score into green ≥7 / yellow 4–7 / red <4 zones — the classic traffic-light bands used in industrial solvent-selection guides. Dragging the weight sliders re-ranks every solvent live, because a solvent that is "green" for one process (e.g. a flammability-insensitive continuous-flow reactor, where the Safety weight can be dropped) may not be green for another.

The polarity filter restricts the ranking to solvents whose polarity actually matches the reaction (a substitution has to dissolve the same reagents to be usable, not just score well). Within the visible set, a red arrow always points from the single worst-scoring solvent to the current top-ranked one — the live "use this instead" substitution suggestion that green-chemistry solvent-selection guides exist to produce. Drag the plot to pan and scroll/pinch to zoom.

Drag to pan · scroll to zoom · circle size = hidden axis · red arrow = substitution suggestion

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