Regulatory Status
For full compliance data across 55 jurisdictions, use the Substance Compliance tool.
Safety Data
Calculate MoS for your specific formulation with the MoS Calculator.
Expert Verdict
⚠ Fungal metabolite (from *Aspergillus terreus*); limited clinical cosmetic safety data; no established maximum use concentration; requires caution in formulation — treat as novel active
Frequently Asked Questions
Is Terrein safe in cosmetics?
⚠ Fungal metabolite (from *Aspergillus terreus*); limited clinical cosmetic safety data; no established maximum use concentration; requires caution in formulation — treat as novel active The EU classifies Terrein as "permitted". Safety rating: MODERATE.
Is Terrein allowed in the EU?
Terrein EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Terrein do in cosmetics?
Terrein functions as: Skin conditioning agent; investigated for anti-melanogenic / skin lightening properties. It is classified as a cosmetic ingredient in our database. CAS number: 20547-94-4.
What is the Margin of Safety for Terrein?
not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.
Compliance Tools
Check Terrein compliance across multiple jurisdictions:
Related Ingredients
Is Terrein in Your Products?
Scan any product label with Piro — our free ingredient scanner. Point your camera at the ingredients list and get instant safety scores for every ingredient.
Try Piro Free →Analyze Your Full Ingredient List
Paste any INCI list into the Decoder for instant safety analysis, or calculate the Margin of Safety for Terrein in your formulation.