Buyer questions · Purchase decisions
Amino-acid cleanser OEM for Thailand: how is the surfactant system chosen, and what must be right for notification and labeling?
Amino-acid cleansers in Thailand require a Pre-market notification filed electronically with Thai FDA, governed by the Cosmetics Act B. E. 2558 (2015) and its 2565 (2022) amendment. For surfactant systems, pairing amino-acid surfactants (e. g. , type 1500) with nonionic or amphoteric additives balances foaming power and mildness. System pH must remain weakly acidic to neutral. Labels require Thai text, full INCI lists, and a three-year valid notification number. A Thai-registered importer acts as the legal notifier, with all requirements subject to the latest official regulatory text.
1Surfactant System & pH
Amino-acid surfactants need nonionic/amphoteric co-surfactants to balance poor foaming and slip. System pH must stay weakly acidic to neutral; alkaline pH causes free acid precipitation. Hard-water testing is mandatory to prevent soap scum. Winter crystallization is resolved by adjusting polyols rather than adding salt; polymer thickeners improve batch consistency.
2Thai FDA Notification Path
Pre-market notification must be filed electronically with Thai FDA before import; the number is valid for 3 years. The Thai-registered importer is the legal notifier with a local address. Review the 2026 proposed list of 10 prohibited and 3 restricted substances to ensure real-time compliance.
3Labeling & Ingredient Control
Thai labels must be applied within 30 days of import, containing product name, INCI list, notification number, and net weight. Foreign text may coexist. For 'no-paraben/sulfate' claims, pass ISO 11930 / USP <51> challenge tests and strictly control fragrance levels to mitigate regulatory risks.
Follow-up questions
- Q:Can a foreign factory file?
- A:No. A Thai-registered importer or manufacturer must act as the notifier.
- Q:Can 'amino acid concentration' be shown?
- A:No, the INCI list shows names only, not specific percentages.
Figures sourced from:各国法规 · 泰国泰国清洁代工东盟化妆品指令附录配方库
Updated 2026-09-18
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