Moderate Cosmetic Ingredient

Thuja Plicata Leaf Oil

INCI: THUJA PLICATA LEAF OIL

CAS Number
Not individually assigned in CosIng (may share with general cedar oil fractions)
Function
Fragrance, masking
Safety Rating
MODERATE

Regulatory Status

🇪🇺 EU Status permitted
EU Max Conc. 0.1%
🇺🇸 US Status permitted
US Notes General cosmetic ingredient; not separately FDA-affirmed; no pre-market approval required

For full compliance data across 55 jurisdictions, use the Substance Compliance tool.

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
high
Sensitization
high

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

🔴 HIGH THUJONE RISK — essential oil from Thuja leaf can contain 50–85% thujone; 🔴 Neurotoxic at low doses; ⚠ Must comply with IFRA thujone category limits; ⚠ Potential skin sensitizer; ⚠ Contraindicated in pregnancy; ⚠ Should never be used undiluted

⚠️
Concern Level: High

Regulatory Flags

plant-oil essential-oil potential-allergen fragrance-component

Frequently Asked Questions

Is Thuja Plicata Leaf Oil safe in cosmetics?

🔴 HIGH THUJONE RISK — essential oil from Thuja leaf can contain 50–85% thujone; 🔴 Neurotoxic at low doses; ⚠ Must comply with IFRA thujone category limits; ⚠ Potential skin sensitizer; ⚠ Contraindicated in pregnancy; ⚠ Should never be used undiluted The EU classifies Thuja Plicata Leaf Oil as "permitted". Safety rating: MODERATE.

Is Thuja Plicata Leaf Oil allowed in the EU?

Thuja Plicata Leaf Oil EU regulatory status: permitted. Maximum allowed concentration: 0.1%. This is based on EU Regulation 1223/2009 and its amendments.

What does Thuja Plicata Leaf Oil do in cosmetics?

Thuja Plicata Leaf Oil functions as: Fragrance, masking. It is classified as a cosmetic ingredient in our database. CAS number: Not individually assigned in CosIng (may share with general cedar oil fractions).

What is the Margin of Safety for Thuja Plicata Leaf Oil?

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 Thuja Plicata Leaf Oil compliance across multiple jurisdictions:

🔬
Ingredient Decoder
Paste a full ingredient list for instant analysis
 🌸
82 Allergen Checker
Check for EU declarable fragrance allergens
 🧪
Substance Compliance
Check compliance across 55 jurisdictions
 🧮
MoS Calculator
Calculate Margin of Safety using SCCS methodology
 ⚗️
Heavy Metal Limits
Compare limits across jurisdictions

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