Good Preservative NOAEL Data Sensitization Data

Cetrimonium Bromide

INCI: CETRIMONIUM BROMIDE

CAS Number
57-09-0
Function
Preservative, Antistatic Agent, Surfactant, Hair Conditioning Agent
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status restricted
EU Max Conc. 0.1% as preservative (Annex V Entry 44); rinse-off up to 2.5%; leave-on hair up to 1.0%; leave-on face up to 0.5%
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes CIR safe in rinse-off and at up to 0.25% in leave-on (1997). 37 VCRP formulations.

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
0.59% (1% in water, 15 min rinse, rat); 0.093% (0.5% hair rinse); 3.15% (3% in water, no rinse)
Sensitization
low

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

3 study endpoints found for Cetrimonium Bromide. 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
LOAEL 10 mg/kg bw/day dermal code:3484 dermal REACH
NOAEL 50 mg/kg bw/day oral rat oral REACH
NOAEL 10 mg/kg bw/day oral rat oral REACH

Sensitization Profile

Contact sensitization data for Cetrimonium Bromide based on clinical patch test studies and IFRA standards.

Sensitization Rate
low
Allergen Class
surfactant
EU Allergen Listed
no
Patch Test Positive Rate
0.3%
Cross-reactivity Group
quaternary-ammonium-group
Reaction Type
contact-dermatitis

Source: IVDK

Expert Verdict

Well-established cationic preservative and conditioner restricted in EU Annex V at 0.1% as preservative with higher limits for rinse-off and leave-on applications. SCCS margin of safety 192 for leave-on formulations. All mutagenicity assays negative.

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Concern Level: Low

Regulatory Flags

Restricted

Frequently Asked Questions

Is Cetrimonium Bromide safe in cosmetics?

Well-established cationic preservative and conditioner restricted in EU Annex V at 0.1% as preservative with higher limits for rinse-off and leave-on applications. SCCS margin of safety 192 for leave-on formulations. All mutagenicity assays negative. The EU classifies Cetrimonium Bromide as "restricted". Safety rating: GOOD. 3 toxicological study endpoint(s) are available in our database.

Is Cetrimonium Bromide allowed in the EU?

Cetrimonium Bromide EU regulatory status: restricted. Maximum allowed concentration: 0.1% as preservative (Annex V Entry 44); rinse-off up to 2.5%; leave-on hair up to 1.0%; leave-on face up to 0.5%. This is based on EU Regulation 1223/2009 and its amendments.

What does Cetrimonium Bromide do in cosmetics?

Cetrimonium Bromide functions as: Preservative, Antistatic Agent, Surfactant, Hair Conditioning Agent. It is classified as a Preservative in our database. CAS number: 57-09-0.

What is the Margin of Safety for Cetrimonium Bromide?

adequate 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 Cetrimonium Bromide?

The NOAEL (No Observed Adverse Effect Level) for Cetrimonium Bromide is 10 mg/kg bw/day based on a dermal study via dermal route in code:3484. A total of 3 study endpoints are available. Source: REACH.

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