Quick answer: Biodegradable means that a substance or material can be broken down into simpler components by microorganisms, such as bacteria and fungi, under suitable conditions. However, it does not mean that the product will quickly disappear in nature, decompose in the sea, or belong in a home compost. When evaluating claims, it is important to ascertain what the claim refers to, by what test it was verified, in what environment, and over what period.
Updated: August 2026
What is biodegradability
Biodegradability is a process in which microorganisms transform organic matter. The outcome depends on the presence of oxygen, temperature, humidity, available microorganisms, substance concentration, and duration.
In an oxygenated environment, during complete or ultimate decomposition, organic matter can primarily convert into carbon dioxide, water, mineral salts, and new microbial biomass. Without oxygen, different processes occur, and different end products, such as methane, may form.
Therefore, it is not enough to simply say "this product decomposes." A meaningful claim should answer at least four questions:
- What exactly decomposes? A single component, surfactants, the entire formulation, or the packaging?
- Where does the decomposition occur? In an aqueous environment, industrial composting facility, soil, wastewater treatment plant, or home compost?
- Under what conditions and how quickly? Temperature, oxygen, and time can fundamentally change the outcome.
- How was the result verified? Standard, laboratory method, certification, or just a general manufacturer's claim?
Biodegradable does not mean "disappears instantly"
A material can be technically biodegradable but decompose very slowly in a specific environment. Fruit peel behaves differently in a warm compost, differently in cold water, and differently in a dry landfill. The same applies to cleaning product ingredients and packaging materials.
Therefore, biodegradability is not an excuse for littering. Always dispose of products or packaging according to the instructions on the label and local sorting rules.
Primary and ultimate biodegradation
For detergents, it is useful to distinguish between two concepts:
Primary biodegradation
The original substance changes significantly due to the action of microorganisms, losing its specific function. For a surfactant, this means losing its surface-active properties. However, other decomposition products may remain.
Ultimate or complete biodegradation
Microorganisms utilize the substance and, under aerobic conditions, convert it into simpler end products such as carbon dioxide, water, mineral salts, and biomass.
European rules for detergents specifically address requirements for ultimate aerobic biodegradability of surfactants. However, this alone does not mean that the entire product, its cap, and packaging have identical properties.
What "readily biodegradable" means
"Readily biodegradable" is a more precise technical term than the general "biodegradable." It is used for substances that pass a demanding screening test under specified laboratory conditions.
OECD 301 methods monitor biodegradation in an aerobic aqueous environment. A positive result means that rapid and ultimate biodegradation of the substance in the environment can be expected. However, a negative result does not automatically prove that the substance is not degradable at all—it merely failed to meet the strict conditions of this particular test.
Biodegradable, compostable, bio-based, and recyclable
These terms are often confused, yet they describe different properties:
| Term | What it means | What it does not automatically imply |
|---|---|---|
| Biodegradable | microorganisms can break down the material under certain conditions | that it will quickly decompose anywhere in nature |
| Compostable | the material meets the decomposition conditions in a defined composting process | that it belongs in a home compost; it may require industrial composting |
| Bio-based | the material is entirely or partially made from biomass | that it is biodegradable or compostable |
| Recyclable | the material can be processed into another raw material under suitable conditions | that it will biodegrade in nature |
For example, plastic can be partially made from plant-based raw materials and yet behave like ordinary non-recyclable or non-degradable plastic. Conversely, some biodegradable materials can be made from fossil raw materials.
Why biodegradability is important for cleaning products
Cleaning and washing products mostly go down the drain with water after use. Wastewater treatment plants remove a large portion of impurities, but they are not a magic filter for every substance and every concentration. Substances that decompose well and are not excessively over-dosed have less potential to persist in the aquatic environment long-term.
This is particularly important for surfactants, which reduce the surface tension of water and help separate grease from surfaces. European legislation requires compliance with biodegradability criteria for surfactants used in detergents. The new EU Regulation 2026/405, which will generally apply from September 23, 2029, updates this framework and gradually introduces further requirements for selected additional organic components.
However, biodegradability is not the only criterion for eco-friendliness. Other important factors include:
- toxicity to aquatic organisms,
- quantity and precise dosing of the product,
- effectiveness at the recommended temperature,
- water and energy consumption,
- origin of raw materials,
- size, material, and recyclability of packaging,
- transportation and possibility of refilling packaging.
Why consider this when buying
Fewer vague green promises
A leaf, tree, or the word "eco" on packaging is not proof of a specific property. When you understand the terms, you can better distinguish documented claims from vague marketing.
Better water protection
A correctly chosen and dosed product with verified environmental properties can reduce unnecessary wastewater burden.
More meaningful packaging choices
A biodegradability claim for the contents does not necessarily apply to the bottle. For packaging, therefore, independently observe the material, recycled content, recyclability, and disposal instructions.
Less waste
Even a readily biodegradable product, when overdosed, represents unnecessary consumption of raw materials, packaging, transportation, and money. The correct dose is often more ecological than any slogan on the front of the label.
How to recognize trustworthy claims
When reading a label or product page, follow this order:
- Find the subject of the claim. Does it refer to the formulation, a single raw material, surfactants, a capsule, film, or packaging?
- Look for conditions. Is an aquatic environment, industrial composting, home compost, or wastewater treatment plant mentioned?
- Look for a method or certification. A specific test, standard, license number, or independent verification is more trustworthy.
- Do not rely on a percentage without context. "100% biodegradable" should explain what exactly constitutes one hundred percent and under what conditions.
- Check the entire life cycle. Assess the composition, dose, efficacy, and packaging separately.
A good guide is the EU Ecolabel. For cleaning products, it's not just about biodegradability, but a set of criteria including limiting hazardous substances, impacts on the aquatic environment, packaging, dosing, and functional suitability.
Examples from Vygruntujeme.cz's offer
For products, always observe what specific claim refers to:
- The product page for Botanica Hair and Body Shampoo, 360 ml states the biodegradability of the packaging with EcoPure technology, its production from 96% recycled plastic with GRS certification, and recyclability. This is information about the packaging, not automatically the same claim for the cosmetic content.
- Botanica premium liquid soap uses the same type of packaging claim and is also available with a five-liter refill.
- BIO liquid soap Freshner Daisy has EU Ecolabel and EcoBioVegan certifications. Certification represents a broader verification than the word "biodegradable" alone.
- Other certified products can be found in the ECOLABEL collection.
Always read manufacturer's data and certifications together with dosing, safety instructions, and intended use.
Common misconceptions
"I can leave a biodegradable product in nature."
No. Conditions in nature may not correspond to test conditions. Waste belongs in a designated collection or sorting system.
"If something dissolves in water, it's biodegradable."
Dissolving is a physical process. A substance may be invisible in water but still chemically present. Biodegradation requires transformation by microorganisms.
"Natural means safe and degradable."
Natural origin does not automatically determine safety, rate of decomposition, or impact on aquatic organisms. The specific substance, dose, and method of use are decisive.
"Biodegradable packaging belongs in organic waste."
Only if it is explicitly certified for that processing method and accepted by the local system. Otherwise, follow the packaging label and local regulations.
Frequently Asked Questions
Is "biologically degradable" the same as "biodegradable"?
In common Czech, both terms are used as synonyms. However, for accurate assessment, the testing method, conditions, time, and extent of decomposition are always important.
How long does it take for a biodegradable product to decompose?
Without further data, it is impossible to say. The time can range from days to years depending on the material and environment. A trustworthy claim therefore states a standard or specific conditions.
Is every cleaning product in the EU biodegradable?
European rules require compliance with ultimate aerobic biodegradability criteria for surfactants in detergents. However, this is not the same as claiming that every ingredient of the entire product and its packaging are readily biodegradable.
Does EU Ecolabel mean the product is 100% biodegradable?
No. EU Ecolabel assesses multiple environmental and functional criteria and limits the amount of some difficult-to-degrade substances. It's not a simple claim that every part of the product will disappear in any environment.
Is biodegradable plastic better than recyclable plastic?
Cannot be decided without knowing the use and disposal system. For packaging that can be easily sorted and recycled, recyclability may be more practical. Biodegradable material only makes sense if there are appropriate conditions and processing pathways.
Ask "what, where, and how long"
Biodegradability is an important property, but its true meaning lies in the details. When choosing, don't just ask if something is biodegradable. Find out which part of the product, according to which test, in what environment, and over what period.
The best ecological choice usually combines a verified formulation, correct dose, efficacy, reasonable packaging, and safe use. This combination makes more sense than a single green symbol.
