Steam sterilised spices have been treated with saturated steam to cut microbial load, and irradiated spices have been exposed to ionising radiation for the same reason. Steam is accepted almost everywhere. Irradiation is allowed for spices in some markets and restricted or disliked in others, and irradiated food usually has to be labelled.
For most importers into Europe, steam is the safer default. Irradiation is a niche option that needs a clear answer from your customer and your authority first.
How steam sterilisation works
The spice is exposed to steam for a short, controlled time and then dried and cooled. The process is aimed at bacteria such as Salmonella and at general plate count. It is explained further in what steam sterilisation is and when you need it.
It does have side effects. Steam can remove some volatile oil, lighten colour or pick up moisture if the drying step is poor. Ask for pre- and post-treatment lab results on your own lot, and check that the plant validates the process for your product.
How irradiation works and where it is allowed
Irradiation uses gamma rays, electron beams or X-rays at a set dose, without heat or moisture. It leaves no chemical residue and keeps volatile oil better in some products, but rules for its use vary by country.
In the EU, irradiation of food is tightly regulated, and dried aromatic herbs and spices are among the few categories on the permitted list, with a dose limit and a requirement to label. Only approved facilities can treat food for the EU market. In the US, the FDA permits irradiation of spices and dry seasonings up to a set dose. Check the current rules with your regulator, because they can change.
Which one will your customers accept?
This is often the deciding question. Many European retailers and brands will not accept irradiated spice, whatever the regulation allows, and consumers may avoid products labelled as irradiated. Organic standards in many markets do not permit irradiation, so an organic lot cannot be treated this way.
Ask your customers in writing which treatments they accept before you specify one. If you want to know what happens when a treatment is wrong for the market, read what ETO treatment is and why EU buyers reject it, which covers a third method that is banned in the EU for food.
What to put in the contract
Whatever you choose, state the treatment, the target microbiological limits and the test method. Ask for a treatment certificate with the lot number. For irradiation, ask for the facility's approval and the dose record. For steam, ask for the process log and the post-treatment lab result.
Neither treatment replaces hygiene earlier in the chain. A sterilised lot can still be recontaminated if it is cooled, ground or packed in a dirty area, so the audit should cover the whole line after treatment. Ask also for a retained sample of each lot, kept by the plant or by an independent party, so that any later dispute has something to test.
Your importer is legally responsible for what enters the market, not the supplier, so confirm requirements with your customs broker and food authority. The document side is covered in the document pack your broker will ask for.
Next step
We can check which treatment each Gujarat plant actually runs, have lots tested before and after, and supervise loading. Book a free sourcing review with the market you sell into.