Musty/earthy (Coffee) GMP Flavour Standard

Musty/earthy (Coffee) GMP Flavour Standard

The FlavorActiV Musty/Earthy Coffee GMP Flavour Standard is a professionally formulated sensory reference that trains tasters to detect and identify the musty, earthy off-flavour in coffee and other food and beverage products. Also known internally as Wet Earthy, this taint is caused by 2-ethyl fenchol, a compound produced by bacteria in water and damp soil.

This reference standard is essential for any coffee sensory quality control program, enabling panellists to build reliable, repeatable detection skills under controlled, GMP-compliant conditions.

£75.00 GBP

Quantity:

We ship globally – shipping costs may apply depending on your region

Minimum Order: £275

WHAT IS MUSTY/EARTHY FLAVOUR IN COFFEE?

Musty/earthy is an off-flavour defect characterised by a sweet, heavy aromatic profile evoking freshly turned soil, decaying vegetation, and damp, dark earth. Also called Wet Earthy internally, this taint falls outside the desired coffee flavour profile and signals a contamination or storage problem when detectable.

The compound responsible is 2-ethylfenchol (ethylfenchol), a naturally occurring geosmin-related molecule produced by soil bacteria and certain microorganisms found in raw water sources.

WHAT CAUSES MUSTY/EARTHY OFF-FLAVOUR IN COFFEE?

Musty/earthy taint in coffee and other beverages typically originates from one or more of the following sources:

– Soil bacteria in raw water produce 2-ethylfenchol, which is found in untreated or inadequately filtered water used for processing or rinsing.
– Poor storage conditions—such as packaging, raw materials, or finished products stored in damp, dark areas—can absorb or accumulate musty compounds over time.
– Packaging migration — 2-ethylfenchol can permeate certain packaging materials, particularly when stored in humid environments.
– Contaminated processing equipment that is not properly cleaned allows residual bacteria to contaminate raw water, which is then transferred to the final product.

Understanding these root causes is essential for sensory panellists, QC managers, and production teams to identify and eliminate the defect at its source.

HOW TO RECOGNISE MUSTY/EARTHY OFF-FLAVOUR: SENSORY TERMS

FlavorActiV Sensory Terms:

– Freshly dug earth
– Damp soil
– Wet earth
– Moldy vegetation

USING THE MUSTY/EARTHY FLAVOUR STANDARD FOR SENSORY TRAINING

FlavorActiV’s GMP Flavour Standard capsules are added directly to a beverage matrix, delivering a precise concentration of 2-ethyl fenchol. This allows sensory panellists to:

1. Learn to identify the musty/earthy defect by smell and taste under controlled conditions
2. Calibrate their detection threshold against a consistent, pharmaceutical-grade reference
3. Validate their individual and panel-level performance through proficiency testing
4. Benchmark results against internal QC specifications and industry standards

Incorporating this standard into a structured sensory quality control training programme ensures panellists can detect even low-level occurrences of this taint in commercial products before they reach consumers.

PROFESSIONAL APPLICATIONS OF THE MUSTY/EARTHY COFFEE FLAVOUR STANDARD

The FlavorActiV Musty/Earthy Coffee GMP Flavour Standard is used across multiple industries where sensory quality control is critical.

– Coffee roasters and producers — detecting post-harvest or storage-related earthiness before green coffee enters production
– Beverage manufacturers — water-intensive processes (soft drinks, juices, beers) where raw water quality affects the finished product
– Food producers — bakery, dairy, and plant-based categories, where damp storage environments can introduce earthy notes
– Contract sensory labs — panel calibration and proficiency testing against a GMP-certified reference
– Quality assurance and R&D teams — training new tasters and maintaining panel-level detection consistency

OTHER INFORMATION

– FlavorActiV’s name for this defect: Wet Earthy
– Chemical compound: 2-ethyl fenchol (ethyl fenchol)
– Primary matrix applications: Coffee, water-based beverages, soft drinks, food products stored in damp conditions
– Standard pack: 5 capsules, individually blister packaged
– Minimum order: £275 | Each flavour standard priced at £75 GBP

To learn more about incorporating the Musty/Earthy Coffee Flavour Standard into your sensory quality control programme, or to discuss bespoke panel training solutions, contact FlavorActiV.

FlavorActiV GMP Flavour Standards

Only Pharmaceutical Quality GMP Flavour Standards provide sufficient quality for professional sensory panels to train and validate with.

We produce encapsulated GMP (Pharmaceutical Good Manufacturing Practice) Flavour Standards that are safe to both smell and drink. The compounds within our capsules impart the aroma, taste and mouthfeel of a specific defect or positive flavour into a beverage for the purposes of taster training, calibration and quality control.

Our individual flavour GMP Flavour Standards are sold by flavour, each flavour pack contains 5 capsules, each separately blister packaged. Our sensory kits contain a mixture of flavours, each separately blister packaged, read the product description for flavour details.

We ship globally, and have over 20 years of experience at it. Our GMP Pharmaceutical Flavour Standards are produced to the highest standards, and as such, their shelf-life is strong and their quality consistent.

FlavorActiV’s flavour centre is the world’s only pharmaceutically run facility dedicated to the production of flavour reference standards. The Flavour Centre is a state-of-the-art facility housed within the campus of world-renowned Quay Pharma near Liverpool in the U.K.

The Flavour Centre was designed by FlavorActiV from the ground up at the direct request of global customers as they looked to move away from inferior food grade ‘certified flavour standards’ to GMP Pharma, a standard that ensures safe, stable, traceable, consistent and long shelf-life products.

All FlavorActiV’s industry-leading encapsulated flavour standards are manufactured following GMP at our Flavour Centre. All aspects of manufacture are overseen by Quay Pharma who are audited by the U.S. Food and Drug Administration (FDA) and the U.K. Medicines and Healthcare Products Regulatory agency (MHRA). We also welcome customer audits.

Only FlavorActiV GMP flavour standard capsules bear our mark of authenticity.

We brand each of our capsules so that our customers know they’re getting the Pharmaceutical GMP Quality that only FlavorActiV provide.

Industry leading packaging and shelf-life

FlavorActiV flavour standards are blister packaged, which extends shelf-life and protects capsules from potential contamination. The average shelf-life of FlavorActiV flavour standards is 18 months to 4 years, depending on the flavour compounds.

We will never ship in pots or plastic packaging, here’s why…

Blister packaging protects capsules from the environment until they are ready for use. Blister packaging greatly reduces the amount of headspace for possible flavour escape. As each capsule individually blister packaged, making use of one capsule still leaves all others protected. FlavorActiV Flavour Standard packaging is 100% recyclable, as opposed to polypropylene which is not widely recycled.

Pots are semi-porous, they allow molecules to pass through and flavour to be lost, their significant headspace also adds to substantial flavour escape as a gas, even when using just one capsule all those remaining in the pot are exposed.

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