Buyer’s Guide to MPI-Approved Cleaning Chemicals NZ

MPI-approved cleaning chemicals, commonly referred to by MPI as maintenance compounds, are detergents, sanitisers and other compounds used to clean or maintain dairy and animal-product processing facilities and equipment. Under the Animal Products Regulations 2021, operators running a risk management programme must use compounds that meet the hygiene requirements in regulation 53(3a), verified against MPI's public approval registers before purchase.

What does "MPI approved" actually mean for a cleaning chemical?

It means the maintenance compound has been assessed against MPI's hygiene requirements for a specific processing context, so it won't contaminate product or damage equipment. The scheme isn't one single list. It splits by sector, and mixing the sectors up is the most common compliance mistake procurement teams make.

For farm dairies, any compound used on the milking plant or bulk milk tank must be an "approved" dairy maintenance compound (DMC). Dairy manufacturing premises, meaning factories rather than farms, are different: maintenance compounds don't have to be MPI-approved there, but operators still have to document why each product is suitable and won't affect the milk. Meat, seafood, honey, and other non-dairy animal product processors under a risk management programme need their chemicals approved through MPI's separate non-dairy register, using application form AP65.

Food Act businesses, which cover most cafés, restaurants, and general food retailers, aren't required to use MPI-approved compounds at all under the Food Act 2014. They just need to show their cleaning chemicals won't adversely affect the food. If your own site mixes food-service and processing areas, our essential cleaning chemicals guide for hospitality, dairy, office, and transport cleaning covers the broader product mix.

Do I actually need an MPI-approved chemical for my facility?

It depends on what you process and which piece of legislation you operate under. Use the table below as a starting point, then confirm your specific obligations with your RMP verifier.

If you operate across more than one category, say a site that handles both dairy and non-dairy products in the same area, the stricter dairy requirement generally applies to that shared space.

How do I verify that a chemical is genuinely MPI-approved before I buy it?

Check the exact product and manufacturer details against MPI's official registers rather than taking a marketing claim at face value or assuming that a similar product is covered by the same approval.

1. Search MPI's food safety registers and lists page for the "Approved and recognised maintenance compounds – Dairy" register or the "Maintenance compounds (non-dairy) register", using the exact product and manufacturer name.
2. Ask your supplier for the current approval code and confirm it matches the register listing.
3. Read the approval conditions carefully. Some codes restrict use to non-edible or inedible-product areas only, while others permit contact surfaces.
4. Cross-check the safety data sheet (SDS) to confirm that it matches the formulation listed on the register. Reformulated products need reapproval.
5. Keep a copy of the register entry or supplier confirmation with your RMP documentation for your verifier or an MPI audit.

What else should procurement and facility teams check beyond MPI approval?

MPI approval covers the risk of food safety contamination. It doesn't replace your workplace safety obligations. Many dairy and food-processing chemicals, including chlorinated sanitisers and alkaline cleaners, are hazardous substances under the Hazardous Substances and New Organisms (HSNO) framework, which WorkSafe NZ regulates on-site.

That means you still need current SDSs available at the point of use, correct HSNO labelling, appropriate PPE for handling concentrates, and safe, segregated storage. WorkSafe NZ has specific guidance on keeping acidic and chlorine-based products apart to avoid dangerous gas reactions. When budgeting for bulk chemical supply, remember that NZ B2B pricing is typically quoted GST-exclusive, so factor that into your landed-cost comparisons across suppliers.

Pure Clean Supplies stocks a dairy-industry cleaning range, including general dairy-cleaning concentrates such as Cow Mate, alongside broader industrial cleaning chemicals by sector, PPE for concentrate handling, and a food-service collection for Food Act businesses. If you're comparing chemicals across several industrial sites rather than one processing facility, our industrial cleaning chemicals buyer's guide is a useful next read. If you need help confirming whether a specific product carries a current MPI approval code for your facility type, our team can point you to the right SDS and supplier documentation.

FAQ

Is "MPI approved" the same for dairy and meat processing chemicals?

No. Dairy and non-dairy animal product processing sit under separate MPI registers with different approval codes, so a compound approved for one sector isn't automatically approved for the other.

Do cafés and restaurants need MPI-approved cleaning chemicals?

Generally no. Businesses operating under the Food Act 2014 aren't required to use MPI-approved maintenance compounds, but they must still demonstrate that their cleaning products won't adversely affect food safety.

Where can I check if a product is on MPI's approved list?

MPI publishes the dairy and non-dairy maintenance compound registers on its food safety registers and lists page. Search by product or manufacturer name and confirm the approval code with your supplier.

Can I use a non-dairy approved chemical in a dairy processing area?

Not automatically. Approval codes specify permitted use areas, and a "non-dairy" approval doesn't mean a product is unsuitable for dairy; you need to check the specific conditions rather than assume either way.

Does MPI approval cover workplace safety as well as food safety?

No. MPI approval addresses the risk of contamination to food or dairy products. Handling, storage, and PPE requirements for hazardous cleaning chemicals are separately regulated by WorkSafe NZ under the HSNO framework.

Browse Pure Clean's dairy industry cleaning range for detergents and sanitisers suited to processing environments, or get in touch and our team will help match products to your risk management programme documentation.