Circular chemistry is often reduced to recycling, which misses most of the value. In molecular manufacturing, circularity starts one step earlier: choosing a carbon source that is already a by-product, and designing the molecule so that its end of life is harmless rather than merely managed. Both decisions are made at the drawing board, not at the waste treatment plant.
- Carbon source
- European side streams, non-food
- Design principle
- Benign by design
- End of life
- F Eco 74.7 % ThCO₂, OECD 301B (GLP); F Pro under final assessment
- Dose effect
- CMC 33 mg/L (F Pro) vs 73 mg/L benchmark, third-party measured
The linear model and why it stalls
Conventional surfactant manufacture is linear: extract fossil or tropical feedstock, convert it, use the product once, and discharge it into wastewater. Every stage of that chain now carries a rising cost, whether it is carbon pricing, deforestation due diligence or wastewater limits.
Circular chemistry attacks the same chain at both ends. It replaces the virgin input with material that already exists as a residue, and it removes the persistence problem at the output by designing molecules that mineralise.
Side streams as a feedstock, not a waste
European industry generates large volumes of biogenic residues that are currently burned or downcycled. Used as chemical building blocks, these residues carry no land use change, no food competition and, crucially, no intercontinental freight.
PureSurf converts renewable European building blocks into surfactant actives on the PureSynth platform, and has scaled that process from laboratory grams to 50 kg per batch in under two years.
- Feedstock that is already inside the EU regulatory perimeter.
- No competition with food production.
- Shorter, more resilient supply chains.
- Value creation from material that was previously an operating cost.
Benign by design
Making a molecule from renewable carbon is only half the task. If it persists in water or is acutely toxic, the circle does not close. Benign by design means environmental performance is a design constraint from the first synthesis round, not a compliance exercise at the end.
The measured outcome for NEXOVANT is stated per grade. Environmental data is stated per grade: NEXOVANT F Eco meets the ready-biodegradability criterion (74.7 % ThCO₂ in 28 days, OECD 301B, GLP), while F Pro is under final assessment. Aquatic toxicity is reported as registered EC50 values under OECD 201 (algae, 72 h) and OECD 202 (Daphnia magna, 48 h) rather than as a multiplier, and the CLP classification is stated per grade. The material is non-mutagenic under OECD 471 (GLP).
Dose reduction is a circularity lever
The most underrated circular lever is simply using less material. A lower critical micelle concentration means the same cleaning performance from a smaller charge of active, which reduces upstream feedstock demand, transport mass, packaging and the load reaching wastewater treatment.
Independent benchmarking at BASF SE measured a CMC of 33 mg/L for NEXOVANT F Pro against 73 mg/L for the C12-C14 amine oxide benchmark, both measured by BASF SE, with an interfacial tension against olive oil of 0.69 mN/m versus 5.52 mN/m for that benchmark. Efficiency at the molecular level does more for a footprint than most downstream interventions.
Frequently asked questions
Is circular chemistry the same as recycling?
No. Recycling recovers material after use. Circular chemistry also selects residue-based inputs and designs molecules whose end of life is harmless, which matters for substances that are dispersed in water and cannot be collected.
Do side-stream feedstocks compete with food production?
The PureSurf feedstock base does not. It uses renewable European side streams rather than food crops.
How does dose reduction help circularity?
Less active per wash means less feedstock, less freight, less packaging and a smaller load on wastewater treatment. A third-party measured CMC of 33 mg/L for F Pro, against 73 mg/L for the benchmark, makes that reduction possible.
Content last reviewed: by Prof. Katalin Barta Weissert
Part of this topic cluster
Bio-based surfactants: the full pillar overviewRelated topics in this cluster
Evidence from our own portfolio: Compare the NEXOVANT, RHEOSYL and SYLVAXIS grade data
