MOPH Notification 461: Thailand Sets New Rules for Food Extraction Solvents

Thailand's Ministry of Public Health published MOPH Notification No. 461 B.E. 2568 (2025), "Re: Extraction Solvents Used in Food Production," on September 3, 2025. The notification sets out which solvents are permitted for use in extraction processes during food manufacturing, and under what residual-limit conditions those solvents may remain in the finished product. For any manufacturer whose supply chain touches solvent extraction, whether that means a flavoring house pulling aromatic compounds from a botanical, an edible-oil processor, a colorant producer, or a functional-food or supplement brand sourcing a plant-based active ingredient, this notification is not a peripheral update. It sits directly on top of a manufacturing step that a large share of the food, functional food, and supplement sector relies on somewhere in its ingredient sourcing.

Why Extraction Solvents Get Their Own Notification

Solvent extraction is one of the most common industrial methods for isolating a desired compound out of a raw material, whether that raw material is a fruit, a seed, an herb, a spice, or a botanical marketed as having a functional benefit. The solvent does its job by dissolving the target compound out of the surrounding plant matrix, and it is then removed, largely but rarely completely, during downstream processing. What remains behind at trace levels is residual solvent, and residual solvent in a finished food product is exactly the kind of thing food safety regulators around the world have long built specific rules around, because the solvents that work best for extraction are not automatically the solvents that are safest to leave behind, even in small amounts. Notification 461 exists because Thailand, like other major food-regulating jurisdictions, treats this as a distinct compliance question separate from general food additive rules or general contaminant rules: which specific solvents may be used at all in an extraction process destined for the Thai food supply, and at what residual concentration a product is still considered compliant.

What the Notification Actually Covers

Notification 461 governs the extraction solvent question at two levels. First, it addresses which solvents are permitted for use in extraction processes applied to food, meaning a manufacturer cannot simply select any technically effective solvent and assume it clears the Thai market by default. Second, it addresses the residual-limit conditions attached to that permitted use, meaning even an approved solvent still carries a compliance obligation around how much of it, if any, can remain in the finished product reaching Thai consumers. Both halves of that structure matter for a compliance program. Confirming that a solvent is on Thailand's permitted list is a necessary first step, but it is not sufficient on its own; the residual limit attached to that solvent's use is the second gate a finished product has to clear, and it is the gate most likely to get missed by a manufacturer who checked solvent eligibility once, early in supplier selection, and never revisited the question at the finished-product testing stage.

Where This Intersects With Food, Functional Food, and Supplement Manufacturing

Extraction shows up across a wider swath of the regulated product landscape than manufacturers sometimes assume. A flavoring extract used in a beverage, a plant-derived colorant used in a confectionery product, a pressed or solvent-extracted oil used as a food ingredient, and a botanical extract standardized for use in a functional food or dietary supplement can all trace back to the same underlying extraction step, and all of them fall within the scope of a notification governing extraction solvents used in food production. This matters in particular for functional-food and supplement manufacturers who source a standardized plant extract from a third-party ingredient supplier rather than performing extraction in-house, because the compliance exposure does not disappear simply because the extraction happened upstream at a supplier's facility rather than the brand's own plant. The finished product sold in Thailand still has to meet Notification 461's requirements regardless of which step in the supply chain the actual extraction took place.

The Practical Compliance Gap: Supplier Knowledge

The most common failure point with a notification like this is not a manufacturer knowingly using a prohibited solvent. It is a manufacturer who genuinely does not know, with documented certainty, which solvent their extraction supplier actually used, because that detail sat several tiers up the supply chain and was never asked for as part of standard ingredient qualification. A certificate of analysis focused on the finished extract's potency or purity does not automatically confirm which solvent produced it or what residual level of that solvent the extract carries. Closing that gap requires going back to the extraction supplier directly and getting a specific, documented answer: which solvent or solvents were used in the extraction process, and what residual-solvent testing data exists to demonstrate the finished extract falls within Thailand's permitted limit. Without that documentation on file, a manufacturer is exposed at exactly the moment it matters most, which is a Thai FDA product registration review or a facility audit, rather than at the point where the gap could have been closed cheaply during supplier qualification.

Building Residual Solvent Testing Into a QC Program

Notification 461 gives manufacturers a clear reason to treat residual-solvent testing as a defined line item in their quality control program rather than an assumption folded into general purity testing. That means, at minimum, confirming which solvent or solvents are actually used at each point of extraction in a product's supply chain, verifying that each of those solvents is one Thailand permits for that use, and either obtaining supplier-provided residual-solvent test data or commissioning independent testing where supplier documentation is thin or unverifiable. This is not meaningfully different in structure from how a well-run QC program already handles other trace-level compliance questions, such as pesticide residues or heavy metals, but it only works if residual solvent is explicitly named as a testing category rather than left to be covered incidentally by some other test that was not actually designed to catch it.

What This Means for a Product Dossier

For a product moving through Thai FDA registration or notification, extraction solvent compliance is the kind of documentation gap that tends to surface late, during technical file review or a facility audit, rather than early, when it would be far cheaper to fix. A dossier that can show, ingredient by ingredient, which solvent was used in any solvent-extraction step and what the residual-solvent test result was against Thailand's permitted limit is in a materially stronger position than one that simply asserts the finished ingredient is compliant without underlying data. Building that documentation into the ingredient qualification process before a filing is submitted, rather than scrambling to obtain it in response to a reviewer's question, is the difference between a routine registration and one that stalls over a gap that had nothing to do with the product's actual safety or formulation and everything to do with paperwork that was never requested from a supplier in the first place.

DeeMED works with food, functional food, and supplement manufacturers on exactly this kind of ingredient-level compliance review as part of our Thai FDA food GMP and registration support, since a dossier can clear every other requirement and still stall over a single unverified extraction solvent buried several tiers up an ingredient's supply chain.