Thailand's Real Sunscreen Restrictions: The National Park Ban, Not an Octocrylene Concentration Cut

An earlier version of this article stated that Thailand's cosmetic regulator had cut the permitted Octocrylene concentration in aerosol sunscreens from 10% to 9% under a "7th Edition UV Filters notification." That claim could not be verified against any Thai FDA source, ASEAN cosmetic ingredient list, or industry regulatory tracker, and it does not match the two real sunscreen-related developments actually affecting the Thai market. This article now covers those two real developments instead.

For any brand selling sunscreen into Thailand, or into both Thailand and the EU, there are two genuinely separate things worth tracking: a longstanding Thai restriction on four UV filters, enforced only inside national parks, and a much larger EU proposal targeting Octocrylene specifically, which does not (yet) have any direct Thai counterpart.

Thailand's Real Sunscreen Restriction: A National Park Ban, Not a Cosmetics Notification

Since August 2021, Thailand has banned the use of sunscreens containing four UV filters, oxybenzone, octinoxate, 4-methylbenzylidene camphor (4-MBC), and butylparaben, inside all national parks, under Section 20 of the National Park Act B.E. 2562 (2019). This is enforced by the Department of National Parks, Wildlife and Plant Conservation (DNP), not Thai FDA, and it is a use restriction tied to reef and marine-ecosystem protection, not a cosmetics-notification concentration limit. Violators face a fine of up to 100,000 THB. Enforcement visibility increased heading into the 2025-2026 high season, with DNP and tourism authorities actively reminding visitors of the rule, which is likely the source of the renewed attention that led to this topic being covered here in the first place.

Octocrylene is not one of the four restricted substances under this rule. A brand selling reef-area or marine-park-adjacent sunscreen in Thailand needs its formula checked against these four specific filters, not against Octocrylene, and needs "reef safe" or "reef friendly" labeling considered for products marketed toward park visitors, since DNP is actively steering consumers toward alternatives free of the four banned filters.

The Real Octocrylene Story Is at the EU, Not in Thailand

Octocrylene itself is under real regulatory pressure, just not from Thai FDA. The European Chemicals Agency (ECHA) opened a public consultation on September 24, 2025 on a proposed EU-wide restriction of Octocrylene under the REACH Regulation, running through March 24, 2026, driven by concerns over its environmental persistence and its capacity to degrade into benzophenone. The proposal under consideration would restrict placing or using Octocrylene at concentrations of 0.01% or higher, a near-total ban, not a narrower cut from 10% to 9% in one product format. This is an EU proposal working through EU process, with no confirmed Thai FDA counterpart action as of this writing.

The practical implication for a Thailand-based brand is indirect but real: any brand formulating sunscreen for both the Thai and EU markets should treat the EU octocrylene restriction as the genuine compliance deadline to plan around for that ingredient, while treating Thailand's own rule as the four-filter national-park restriction above, not a Thai-specific Octocrylene concentration change. Conflating the two, as this article previously did, risks a brand either missing the real EU deadline or reformulating a Thailand-only product against a concentration limit that Thai FDA has never actually published.

What This Means for DeeMED Clients

Brands selling sunscreen in Thailand should confirm their formula is free of the four DNP-restricted filters if the product is marketed for beach, island, or national-park use, and should separately track the EU's ECHA octocrylene consultation if the same formula, or a shared supply chain, also serves EU markets. DeeMED works with sunscreen and sun-care brands on cosmetic notification and registration in Thailand, including confirming which restrictions genuinely apply to a given formula and market, rather than working from a citation that turns out not to trace back to an actual Thai FDA action.