Moderate Fragrance NOAEL Data Sensitization Data Dermal Penetration

Cinnamyl Alcohol

INCI: CINNAMYL ALCOHOL

CAS Number
104-54-1
Function
Fragrance ingredient
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status restricted
EU Max Conc. 0.001% (leave-on); 0.01% (rinse-off)
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes IFRA restricts by product category; pro-hapten chemistry noted

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

6 study endpoints found for Cinnamyl Alcohol. NOAEL (No Observed Adverse Effect Level) values are used to calculate the Margin of Safety per SCCS methodology.

Endpoint Value Route Species Study Type Source
NOAEL 1000 mg/kg bw/day oral rat oral REACH
NOAEL 53.5 mg/kg bw/day oral rat oral REACH
LOAEL 6366 mg/kg bw/day oral rat oral REACH
NOAEL 125 mg/kg bw/day oral rat oral REACH
NOAEL 100 mg/kg bw/day oral rat oral REACH
NOAEL 1000 mg/kg bw/day oral rat oral REACH

Sensitization Profile

Contact sensitization data for Cinnamyl Alcohol based on clinical patch test studies and IFRA standards.

Sensitization Rate
moderate
Allergen Class
fragrance
EU Allergen Listed
yes
Patch Test Positive Rate
2.1%
Cross-reactivity Group
balsam-of-peru-group
Reaction Type
contact-dermatitis
IFRA Restricted โ€” max 0.8% in finished products

Source: ESSCA/IVDK

Dermal Penetration Profile

Skin absorption and penetration characteristics of Cinnamyl Alcohol, relevant to systemic exposure and MoS calculations.

Absorption %
20-30%
Penetration Level
epidermis
Penetration Depth
epidermis/dermis
Molecular Weight
134.2 Da
Log P
1.54
Systemic Absorption
yes
Topical Bioavailability
15-26%
Safety Margin Factor
high
Vehicle Dependent
Yes โ€” absorption varies by formulation

Source: SCCS/1459/11, IFRA

Expert Verdict

FM I fragrance allergen functioning as a pro-hapten that oxidizes to cinnamaldehyde under use conditions, the primary sensitizing species. EU Annex III listed with mandatory labeling above 0.001% (leave-on) and 0.01% (rinse-off); IFRA restricts by product category.

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Concern Level: High

Regulatory Flags

fragrance-allergen eu-annex-iii fm-i patch-test-standard mandatory-label pro-hapten eu_children_restricted ifra_fragrance fda_food_additive eu_cosing_listed jecfa_safe

Frequently Asked Questions

Is Cinnamyl Alcohol safe in cosmetics?

FM I fragrance allergen functioning as a pro-hapten that oxidizes to cinnamaldehyde under use conditions, the primary sensitizing species. EU Annex III listed with mandatory labeling above 0.001% (leave-on) and 0.01% (rinse-off); IFRA restricts by product category. The EU classifies Cinnamyl Alcohol as "restricted". Safety rating: MODERATE. 6 toxicological study endpoint(s) are available in our database.

Is Cinnamyl Alcohol allowed in the EU?

Cinnamyl Alcohol EU regulatory status: restricted. Maximum allowed concentration: 0.001% (leave-on); 0.01% (rinse-off). This is based on EU Regulation 1223/2009 and its amendments.

What does Cinnamyl Alcohol do in cosmetics?

Cinnamyl Alcohol functions as: Fragrance ingredient. It is classified as a Fragrance in our database. CAS number: 104-54-1.

What is the Margin of Safety for Cinnamyl Alcohol?

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.

What is the NOAEL for Cinnamyl Alcohol?

The NOAEL (No Observed Adverse Effect Level) for Cinnamyl Alcohol is 1000 mg/kg bw/day based on a oral study via oral route in rat. A total of 6 study endpoints are available. Source: REACH.

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