Meet Sugarcane Process Decaf:

A Naturally-Derived, Science-Backed Choice for Coffee Lovers

The peer-reviewed evidence supporting a cleaner, gentler decaffeination method, and why health-conscious coffee drinkers prefer it.

Decaffeinated coffee, as a beverage category, is consistently associated with reduced mortality and disease risk in some of the largest prospective cohort studies ever conducted on diet and human health. Despite decaf's growing popularity, it attracts bad press because of a certain processing method that uses methylene chloride, a solvent classified by the International Agency for Research on Cancer as a probable human carcinogen.

However, there are three other non-toxic commercial decaffeination methods: Water process (Mountain Water® and Swiss Water®), supercritical CO₂, and the sugarcane process (also called ethyl acetate or EA decaf). These methods use naturally occurring substances, and all three have been reviewed and approved by the major food safety regulators.

Today we’re focusing on the sugarcane process, which is what we use to decaffeinate our new Aponte Inga Decaf coffee. Its solvent is manufactured by fermenting sugarcane molasses; residues in finished coffee are well below regulatory limits. What follows is what the peer-reviewed literature shows.

What ethyl acetate actually is

Ethyl acetate (EA) is a simple ester. Esters are a class of molecules that form when an alcohol reacts with an acid, and EA is the specific one produced when ethanol meets acetic acid. It is one of the most common naturally occurring flavor compounds in food. Ripe bananas contain roughly 200 milligrams of EA per kilogram. It’s a major component of the aroma of pears, pineapples, strawberries, and apples. It’s in every glass of wine, every bottle of vinegar, and every loaf of fermented bread. The flavor and fragrance industry regards it as a flavoring substance that is generally recognized as safe (GRAS), and the FDA, the EU, and the Joint FAO/WHO Expert Committee on Food Additives (JECFA) have all reviewed and approved it for use in food.

In other words, EA is not some unusual industrial chemical that the coffee industry accidentally discovered. It’s a molecule your body has been exposed to through fruit, fermented foods, and drinks throughout your life.

Where does the EA used in decaf come from?

Most of the ethyl acetate used for specialty-grade decaf, and essentially all of the EA used in Colombia, where this method was refined, is naturally derived from sugarcane. Sugarcane molasses is fermented to ethanol, the ethanol is esterified with acetic acid (also known as vinegar, itself from the same fermentation stream), and the result is a natural solvent that meets food-grade specifications. Because it comes from a renewable agricultural feedstock through a microbial process, the European Union officially considers it natural and able to be certified as organic. This is why EA decaf is often marketed as the sugarcane process or natural decaf.

It's important to consider the alternative route of producing ethyl acetate, as this often causes consumer confusion. The other commercial route is the petrochemical process, which produces ethyl acetate from synthetic ethanol and acetic acid. The resulting molecule is chemically identical to the naturally derived version, and, perhaps counterintuitively, both meet the same food-grade standards regardless of how they are made.

However, the specialty decaf industry, which both Sacred Cups and Purity are part of, uses only the sugarcane version. At the Descafecol plant in Manizales, Colombia, which processes most of the world's specialty-grade EA decaf, the EA is sugarcane-derived, without exception.

How the process works

The decaffeination happens on raw, green, unroasted beans. In short, the beans are steamed to open up their cells, then washed with a dilute EA-in-water solution at around 70°C. Caffeine is selectively pulled out of the bean into the EA phase. Then the beans are steam-stripped at 100–110°C to remove any remaining solvent. Since EA boils at 77°C, essentially all of it evaporates. Finally, the beans are dried and shipped to roasters, where roasting at 200°C+ removes any last traces of the solution.

Meanwhile, the chlorogenic acids, trigonelline, oils, and flavour precursors that give coffee its taste and antioxidant profile stay with the bean. A 2006 paper in the Journal of Agricultural and Food Chemistry (Farah et al.) showed that chlorogenic acids (CGA), coffee’s main antioxidants, are preserved better by EA processing than by most alternatives.

How much ethyl acetate ends up in your cup?

Very little. The FDA’s legal limit for residual EA in roasted decaffeinated coffee is 10 milligrams per kilogram of coffee. In practice, published gas chromatography measurements (Pan et al., 2016; Ramalakshmi & Raghavan, 1999) find actual residues at 0.3–1.0 mg/kg — about ten times below the limit. And only a fraction of that transfers to your cup when you brew.

If you drank five cups of EA-decaffeinated coffee in a day, you would ingest roughly 0.02 milligrams of ethyl acetate. For context: a single banana contains around 45 milligrams of EA. A glass of red wine has 7–15 mg. A tablespoon of apple-cider vinegar has about 3 mg. Your decaf habit is a rounding error compared to the EA in a fruit salad.

From Aponte to your cup: a lighter footprint

Our decaf is designed around a lighter footprint. The coffee moves directly from Aponte’s designated dry mill in Nariño, Colombia, to the sugarcane-process facility in Manizales while the green beans are still fresh, avoiding the months (sometimes years) of warehousing and long-haul routing that characterize most decaffeinated lots on the market. That shorter, more direct supply chain means a smaller carbon footprint, greater freshness and better starting quality at the moment of decaffeination.

Once decaffeinated, the beans are packed in multi-layer, food-safe barrier bags whose film chemistry is specifically compatible with ethyl acetate. Peer-reviewed polymer research (Auras, 2007, Thermodynamics, Solubility and Environmental Issues, Elsevier, Ch. 19) shows that ethyl acetate absorbs and permeates far more readily in single-layer polyethylene (LDPE) and polypropylene than in higher-barrier films such as PET (and that polystyrene actually dissolves in the solvent). Purity’s bags are specified with that chemistry in mind, so any residual ethyl acetate outgasses cleanly without weakening the film or affecting the bean.

The waste profile of EA decaffeination compares well to the alternatives. Spent solvent is recovered by distillation and recirculated within the plant, and the small fraction that enters wastewater is broken down within weeks by ordinary aerobic microorganisms. (The OECD classifies ethyl acetate as readily biodegradable, a designation given to only a handful of industrial solvents.) Water-based decaffeination, by contrast, has large process water and carbon regeneration requirements, and supercritical CO₂ decaffeination is highly energy-intensive because of the elevated pressure that must be sustained throughout each extraction cycle. Every commercial method involves tradeoffs; the sugarcane EA process is well-suited to closed-loop solvent recovery and breaks down cleanly in the environment.

What the regulators say

Ethyl acetate for decaffeination is approved by:

• The U.S. FDA (21 CFR 173.228), which explicitly lists it for decaffeinating coffee and tea;
• The European Union (Directive 2009/32/EC), which places EA in the “no numerical residue limit required” category — the most permissive tier — because the science shows Good Manufacturing Practice alone is enough;
• JECFA (the FAO/WHO committee), which reviewed EA and concluded its use raises no safety concern (WHO Technical Report Series 868);
• The ICH (International Council for Harmonization), which classifies EA as a Class 3 solvent — the lowest-toxicity class — with a permitted daily exposure of 50 mg.

Your five-cup-a-day decaf habit delivers about 0.04% of that 50 mg benchmark.

Before Purity placed any orders, our green coffee buying officer traveled to Manizales to walk through the plant in person, meet the operations and safety teams, and observe handling firsthand. This kind of on-site assessment is a standard Purity procurement practice at every origin and every processor we work with: what we are willing to put in our customers' cups starts with the conditions under which the people handling the coffee work.

The regulatory framework that governs ethyl acetate in food processing requires closed system distillation, solvent recovery, and routine atmospheric monitoring, and Descafecol operates within it. In terms of worker health, ethyl acetate has no documented chronic health effects at the occupational exposure levels permitted by international regulators.

The bottom line

We have written elsewhere on the broader cohort and meta-analysis evidence for decaffeinated coffee as a healthful beverage. The short version anchors what follows. Large prospective studies consistently associate decaf consumption with reduced all-cause mortality and lower risk of type 2 diabetes, chronic liver disease, and hepatocellular carcinoma (Freedman et al. 2012 NEJM, NIH AARP cohort of 402,260; Ding et al. 2014 Diabetes Care; Kennedy et al. 2021 BMC Public Health, UK Biobank; Poole et al. 2017 BMJ umbrella review). Those are not the findings you would see in cohorts of this size if EA decaffeination were leaving harmful residues behind.

Ethyl acetate decaffeination uses a naturally occurring food molecule in a process designed and regulated to leave almost nothing behind. The residues in your cup are far below the legal limit, far below pharmaceutical safety thresholds, and orders of magnitude smaller than the EA you ingest from an ordinary piece of fruit. Every major food-safety regulator in the world has looked at the process and approved it. And the beverage itself, decaffeinated coffee, is associated with measurable health benefits in the largest prospective studies ever conducted on diet and mortality.

That’s why we chose the sugarcane EA process for our Aponte Inga Decaf because it preserves flavor and antioxidants, uses a renewable feedstock, meets the highest residue standards, carries a lower greenhouse-gas footprint thanks to direct, fresh-batch sourcing and barrier-compatible packaging, and is backed by a cleaner evidence base than any alternative. If you love coffee and you want to protect your sleep, your blood pressure, or simply your second cup of the day, decaf done this way is a thoughtful choice.

Key sources: FDA 21 CFR 173.228; EU Directive 2009/32/EC; ICH Q3C(R8); JECFA (WHO Technical Report Series 868); Farah et al., 2006 J. Agric. Food Chem.; Pan et al., 2016 J. Food Sci. Technol.; Ramalakshmi & Raghavan, 1999 Crit. Rev. Food Sci. Nutr.; Freedman et al., 2012 NEJM; Ding et al., 2014 Diabetes Care; Kennedy et al., 2021 BMC Public Health; Poole et al., 2017 BMJ; Auras, 2007 in Thermodynamics, Solubility and Environmental Issues (Elsevier), Ch. 19.