Moderate Cosmetic Ingredient NOAEL Data

Perhydrol Urea

INCI: UREA PEROXIDE

CAS Number
124-43-6
Function
Oxidizing agent, oral care agent for teeth whitening, hair bleaching auxiliary
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status restricted
๐Ÿ‡บ๐Ÿ‡ธ US Status restricted
US Notes FDA classifies as OTC drug when used for teeth whitening; cosmetic use in hair and skin not specifically restricted but governed by general safety provisions.

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
moderate
Sensitization
moderate

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

8 study endpoints found for Perhydrol Urea. 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 100 ppm oral mouse oral REACH
NOAEL 216 mg/kg bw/day dermal rat dermal REACH
NOAEL 45000 ppm oral mouse oral REACH
NOAEL 338.4 mg/kg bw/day dermal - dermal REACH
NOAEL 45000 ppm oral rat oral REACH
NOAEL 100 ppm oral - oral REACH
NOAEL 45000 ppm oral - oral REACH
NOAEL 45000 ppm oral - oral REACH

Expert Verdict

Strong oxidizer incompatible with reducing agents, thiols, and antioxidants; can increase percutaneous absorption of co-formulated ingredients; requires pH control to prevent skin irritation above 4% Hโ‚‚Oโ‚‚ concentration.

โš ๏ธ
Concern Level: Moderate

Frequently Asked Questions

Is Perhydrol Urea safe in cosmetics?

Strong oxidizer incompatible with reducing agents, thiols, and antioxidants; can increase percutaneous absorption of co-formulated ingredients; requires pH control to prevent skin irritation above 4% Hโ‚‚Oโ‚‚ concentration. The EU classifies Perhydrol Urea as "restricted". Safety rating: MODERATE. 8 toxicological study endpoint(s) are available in our database.

Is Perhydrol Urea allowed in the EU?

Perhydrol Urea EU regulatory status: restricted. This is based on EU Regulation 1223/2009 and its amendments.

What does Perhydrol Urea do in cosmetics?

Perhydrol Urea functions as: Oxidizing agent, oral care agent for teeth whitening, hair bleaching auxiliary. It is classified as a cosmetic ingredient in our database. CAS number: 124-43-6.

What is the Margin of Safety for Perhydrol Urea?

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 Perhydrol Urea?

The NOAEL (No Observed Adverse Effect Level) for Perhydrol Urea is 100 ppm based on a oral study via oral route in mouse. A total of 8 study endpoints are available. Source: REACH.

๐Ÿ“ฑ

Is Perhydrol Urea in Your Products?

Scan any product label with Piro โ€” our free ingredient scanner. Point your camera at the ingredients list and get instant safety scores for every ingredient.

Try Piro Free โ†’

Analyze Your Full Ingredient List

Paste any INCI list into the Decoder for instant safety analysis, or calculate the Margin of Safety for Perhydrol Urea in your formulation.