Good Cosmetic Ingredient NOAEL Data

Thiodipropionic Acid

INCI: THIODIPROPIONIC ACID (TDPA)

CAS Number
111-17-1
Function
Antioxidant
Safety Rating
GOOD

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes CIR assessed: "Safe for use in cosmetics with qualifications" โ€“ formulate to be non-irritating

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

9 study endpoints found for Thiodipropionic Acid. 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 Short Term Toxicity COSMOS_DB
NOAEL 500 mg/kg bw/day oral rat Chronic COSMOS_DB
NOAEL 565 mg/kg bw/day oral guinea pig Subchronic COSMOS_DB
NOAEL 57 mg/kg bw/day oral rat Developmental COSMOS_DB
NOAEL 1500 mg/kg bw/day oral rat Chronic COSMOS_DB
dose_tested 1000 mg/kg bw/day oral rat Short Term Toxicity COSMOS_DB
dose_tested 565 mg/kg bw/day oral guinea pig Subchronic COSMOS_DB
dose_tested 57 mg/kg bw/day oral rat Developmental COSMOS_DB
dose_tested 1500 mg/kg bw/day oral rat Chronic COSMOS_DB

Expert Verdict

Causes serious eye damage/irritation (GHS H318/H319) โ€“ avoid eye-area products or ensure adequate dilution; formulate to be non-irritating per CIR qualification

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Concern Level: Moderate

Regulatory Flags

fda_food_additive

Frequently Asked Questions

Is Thiodipropionic Acid safe in cosmetics?

Causes serious eye damage/irritation (GHS H318/H319) โ€“ avoid eye-area products or ensure adequate dilution; formulate to be non-irritating per CIR qualification The EU classifies Thiodipropionic Acid as "permitted". Safety rating: GOOD. 9 toxicological study endpoint(s) are available in our database.

Is Thiodipropionic Acid allowed in the EU?

Thiodipropionic Acid EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.

What does Thiodipropionic Acid do in cosmetics?

Thiodipropionic Acid functions as: Antioxidant. It is classified as a cosmetic ingredient in our database. CAS number: 111-17-1.

What is the Margin of Safety for Thiodipropionic Acid?

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 Thiodipropionic Acid?

The NOAEL (No Observed Adverse Effect Level) for Thiodipropionic Acid is 1000 mg/kg bw/day based on a Short Term Toxicity study via oral route in rat. A total of 9 study endpoints are available. Source: COSMOS_DB.

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