Evonik has partnered with Scottish biotech firm Celtic Renewables to convert scotch whisky production waste into a cosmetic emollient, moving whisky co-products from the distillery stream into personal care formulation stock.

The collaboration pairs one of the world's largest specialty chemicals suppliers with a company built specifically around whisky residue valorization. Celtic Renewables has made its name processing the two main by-products of scotch production — draff, the spent grain left after mashing, and pot ale, the liquid residue from copper stills — into biochemicals through fermentation.

For formulators, the significance is straightforward: a major raw material supplier is opening a new feedstock lane for emollients, the workhorse ingredients that deliver skin feel and texture in creams, lotions and hair care products.

What does the partnership mean for procurement?

Emollient buyers face growing pressure on two fronts — fossil-derived inputs and palm-based materials, both of which carry sustainability and supply-chain scrutiny. A whisky-waste-derived emollient offers procurement teams a third option with a traceable, regional waste stream behind it.

Scotch whisky production generates substantial residual volumes each year, and the industry has been under pressure to find higher-value outlets for them. Distillers currently use much of the draff and pot ale as animal feed, but fermentation routes can upgrade those same inputs into chemicals that command far higher prices per tonne.

Evonik brings to the deal what Celtic Renewables lacks: formulation-grade production capacity, global distribution and the regulatory infrastructure — including INCI registration and safety dossiers — that a cosmetic ingredient needs before it reaches a supplier catalogue.

What should formulators watch next?

The critical data points for anyone considering the ingredient in development:

• The INCI name and CAS designation Evonik assigns to the material, which will determine how it appears on labels and in the Personal Care Products Council dictionary
• Recommended use levels and sensory profile benchmarks against incumbent emollients such as isopropyl myristate or C12-15 alkyl benzoate
• Compliance status under EU Cosmetic Regulation 1223/2009 and FDA requirements for the US market
• Sustainability documentation — feedstock provenance, carbon footprint data and any certification the partners pursue

Until those details land, the announcement functions primarily as a signal of direction: Evonik is betting that fermentation-derived ingredients from food and beverage waste can compete in the emollient category, where naturality claims and origin stories now influence purchasing decisions at every tier from mass to prestige.

A wider pattern in ingredient sourcing

The Evonik–Celtic Renewables deal fits a broader shift among large chemical suppliers toward circular feedstocks. Upcycled ingredients — materials recovered from food, agricultural or beverage waste — have moved from marketing novelty to procurement criterion, particularly in European markets where claims substantiation rules reward documented waste-stream origins.

Whisky waste sits among the more attractive feedstocks because it arrives in consistent, centralized volumes from a geographically clustered industry, an advantage over scattered agricultural residues.

Celtic Renewables, headquartered in Scotland, has spent years developing its fermentation platform around this specific input. Landing a partner of Evonik's scale marks the clearest validation yet that its process can serve industrial demand rather than pilot projects.

The next milestone to watch is commercial availability: an Evonik product launch date, initial supply volumes and the first formulation examples from brand customers will tell the trade whether this is a niche sustainability story or a genuine addition to the emollient palette.