Compostable Packaging Certification Australia: AS4736 Explained

The Standard That Separates Genuine Compostable Packaging from Greenwash

Walk into any packaging supplier's showroom and you'll see the word "compostable" stamped across hundreds of products. But here's the problem: without a certified standard behind that claim, it means almost nothing. In Australia, the benchmark that actually holds packaging to account is AS4736-2006 — and if you're running a food business, sourcing packaging, or trying to stay ahead of Australia's tightening single-use plastic regulations, understanding this standard isn't optional. It's essential.

This article breaks down what AS4736 requires, how it differs from the related standard AS5810, and what certification logos to look for when you're buying compostable packaging wholesale. No jargon, no filler — just what a busy café or restaurant owner actually needs to know.

What Is AS4736-2006 and Why Does It Exist?

AS4736-2006 is the Australian Standard for biodegradable plastics — specifically those suitable for industrial composting. It was developed by Standards Australia and aligns closely with the equivalent European standard EN 13432 and the American ASTM D6400. The standard was established to give businesses, waste processors, and consumers a verifiable, science-backed definition of what "compostable" actually means.

Before this standard existed, manufacturers could slap "compostable" on a product with no third-party verification. AS4736 changed that by setting four core requirements that a material must meet:

• Biodegradation: At least 90% of the material must convert to carbon dioxide within 180 days under controlled composting conditions (58°C ± 2°C).
• Disintegration: At least 90% of the material must break into pieces smaller than 2mm within 12 weeks in a composting environment.
• Ecotoxicity: The resulting compost must not harm plant growth — tested using standard plant bioassays comparing compost with and without the material.
• Low heavy metals: The material must not exceed regulated concentration limits for heavy metals including zinc, copper, nickel, cadmium, lead, mercury, chromium, and molybdenum.

Only products that pass all four criteria through an accredited testing laboratory can legitimately claim AS4736 certification. This is what makes it meaningful — and what makes uncertified "compostable" claims a red flag.

AS4736 vs AS5810: Industrial vs Home Compostable

This is where many buyers get confused, and it's worth getting clear on. Australia actually has two relevant compostability standards:

• AS4736-2006 — covers plastics designed for industrial (commercial) composting at high temperatures (typically 55–60°C). This is the standard applied to most commercial food packaging: sugarcane containers, PLA cups, CPLA cutlery, and compostable bin liners.
• AS5810-2010 — covers materials suitable for home composting at ambient temperatures (typically 20–30°C). This is a significantly higher bar because home compost heaps don't reach the sustained temperatures of industrial facilities.

For a café owner, the practical implication is this: packaging certified only to AS4736 should ideally be directed to a commercial composting facility — not a home compost bin. If your council provides a FOGO (Food Organics and Garden Organics) bin service that accepts compostable packaging, AS4736-certified products are generally accepted, though you should always verify with your local processor. Products certified to AS5810 offer more flexibility but are currently less common in commercial food service applications.

When you're browsing the full range of 700+ eco products at ZenPacks, look for the certification callouts in product descriptions — reputable suppliers will specify which standard applies.

The Seedling Logo and ABA Certification: What to Look For

Knowing the standards exist is one thing. Knowing how to spot them on a product is another. In Australia, the certification program is administered by the Australasian Bioplastics Association (ABA), which licenses the internationally recognised Australian Seedling Logo — the green seedling on a white background.

When you see this logo on packaging, it means the product has been independently tested and verified against AS4736 (industrial) or AS5810 (home composting), depending on which logo variant appears. The ABA maintains a public database of certified products, which you can cross-reference if a supplier's claim seems questionable.

Here's what to check when evaluating a supplier's compostable claims:

1. Is there a certification number? Legitimate products carry an ABA licence number, not just a generic seedling graphic.
2. Which standard applies? AS4736 or AS5810 — the product documentation should specify.
3. Is it on the ABA register? Search the ABA website to confirm the product is currently certified, not just historically tested.
4. Does the packaging itself carry the mark, or just the supplier's marketing material? The physical product should be labelled.

Greenwashing in this space is real. In 2021, the ACCC highlighted environmental claims — including "compostable" and "biodegradable" — as a key area of concern in its Sustainability Claims report. Businesses making unsubstantiated environmental claims on packaging face potential action under the Australian Consumer Law, specifically sections dealing with misleading and deceptive conduct.

How AS4736 Certification Affects Your Business Practically

Beyond compliance and ethics, certification has direct operational implications for food businesses — particularly as Australian states progressively tighten single-use plastics legislation.

South Australia's Single-use and Other Plastic Products (Waste Avoidance) Act 2020 was among the first to formally restrict certain single-use plastics. New South Wales, Victoria, Queensland, Western Australia, and the ACT have all followed with staged bans between 2022 and 2025 targeting items including plastic straws, cutlery, plates, and food containers. Several of these state frameworks explicitly reference or favour compostable alternatives — and in some council procurement policies, AS4736 certification is a mandatory specification for compostable packaging to qualify as an approved substitute.

If your business supplies packaged food to schools, hospitals, government events, or council-run facilities, there's a reasonable chance you'll be asked to demonstrate your packaging carries AS4736 certification. Having that documentation ready — from your supplier — protects you from compliance risk and strengthens your tender position.

There's also a growing consumer expectation angle. Research by Planet Ark and the Australian Packaging Covenant Organisation (APCO) consistently shows that Australian consumers are increasingly sceptical of unverified environmental claims. Certified compostable packaging — with a visible, recognisable logo — gives customers genuine confidence that your sustainability story is real.

Common Materials and Whether They Meet AS4736

Not all "eco" materials automatically meet AS4736. Here's a quick reference for the materials commonly found in food service packaging:

• Sugarcane (bagasse) pulp — Generally meets AS4736. Breaks down efficiently in industrial composting conditions. Widely used for takeaway containers, plates, and bowls.
• PLA (polylactic acid) — Meets AS4736 when certified, but requires sustained high temperatures to break down. Will not biodegrade in home compost or landfill in any meaningful timeframe. Often used in cold cups and lids.
• CPLA (crystallised PLA) — Used in cutlery and hot cup lids. Certified AS4736 products exist; check the specific product.
• Kraft paper with compostable lining — Depends on the liner. Uncoated kraft is generally compostable; products with PLA or aqueous coatings need to be verified individually.
• Bamboo fibre — Most certified bamboo fibre products meet AS4736. Distinct from solid bamboo items, which may not disintegrate within the required timeframe.
• Uncoated paperboard — Typically compostable and may not even require certification, as it's cellulose-based. Check for food-safe inks and coatings.

The material alone doesn't guarantee certification — the specific product formulation, thickness, and any coatings all affect test outcomes. Always request the certification documentation for the specific SKU you're purchasing, not just the material category.

Frequently Asked Questions

Can I call my packaging "compostable" if it doesn't have AS4736 certification?

Technically you can make the claim, but it's legally risky. Under the Australian Consumer Law, environmental claims must be truthful, accurate, and substantiated. Without third-party certification like AS4736, you're relying on the manufacturer's word — which may not hold up if the ACCC or a state fair trading body investigates. The safest approach is to only use the term "compostable" on packaging that carries a valid ABA certification number.

Do council FOGO bins accept AS4736-certified packaging?

Many do, but it varies significantly by council and waste processor. Some commercial composting facilities in Australia accept AS4736-certified packaging alongside food organics; others only process food waste. Contact your local council or check their FOGO program guidelines. Importantly, even certified compostable packaging should be emptied of food residue before going in — though small food scraps are generally fine. Do not place compostable packaging in general recycling bins, as it contaminates the recycling stream.

What's the difference between a product being "tested" to AS4736 and being "certified"?

This is a meaningful distinction. A product can be tested by a laboratory against AS4736 parameters without being formally certified through the ABA's licensing program. Certification involves ongoing auditing, licence fees, and the right to use the official Seedling Logo. Testing alone — without certification — means there's no independent body verifying the ongoing consistency of the product. For purchasing decisions, prioritise certified products over merely "tested" ones.

Is AS4736 the same as EN 13432 or ASTM D6400?

They're closely aligned but not identical. AS4736 was developed with reference to the European EN 13432 standard and shares most of its core test criteria. Products certified to EN 13432 or ASTM D6400 may also meet AS4736 requirements, but they are not automatically recognised as AS4736 certified in Australia. If you're importing packaging from overseas suppliers, ask specifically for Australian certification or confirmation that the product has been assessed against AS4736 by an accredited Australian laboratory.

Sourcing AS4736-Certified Packaging for Your Business

Understanding the standard is only half the job. The other half is finding a supplier who stocks genuinely certified products, provides transparent documentation, and can meet the volume demands of a busy food service operation.

ZenPacks stocks a wide selection of compostable packaging — from sugarcane containers and PLA cups to CPLA cutlery and compostable bin liners — with certification details available for individual products. Whether you're running a café in Melbourne, a catering operation in Brisbane, or a food truck circuit across Sydney, the full range of 700+ eco products is available at competitive wholesale pricing with fast dispatch from Sydney. Orders are placed online with carton-quantity pricing that makes genuine sustainability genuinely affordable — without compromising on the certification standards that actually matter.

If you're unsure which products in our range carry AS4736 certification or need documentation for a council tender or procurement process, reach out directly — the ZenPacks team can provide product-specific certification details to support your compliance needs.

Related reading: Browse our Sugarcane Plates & Bowls | Browse our Compostable Cups | Read also: Compostable vs Biodegradable vs Recyclable Packaging Explained