Excellent Cosmetic Ingredient NOAEL Data SCCS/CIR Reviewed

Tromethamine

INCI: TROMETHAMINE

CAS Number
77-86-1
Function
pH adjuster, buffering agent, fragrance ingredient
Safety Rating
EXCELLENT

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
EU Max Conc. 0.5%
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes CIR-reviewed and found safe in the practices of use and concentration described

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

9 study endpoints found for Tromethamine. 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 500 mg/kg bw/day intravenous rabbit other REACH
NOAEL 250 mg/kg bw/day oral rat oral REACH
NOAEL 186 mg/kg bw/day intravenous rabbit other REACH
NOAEL 4000 mg/kg bw/day oral dog oral REACH
LOAEL 1500 mg/kg bw/day other rat other REACH
NOAEL >=2000 other oral rat oral REACH
NOAEL 4000 mg/kg bw/day oral rat oral REACH
NOAEL 930 mg/kg bw/day intravenous mouse other REACH
LOAEL 1470 mg/kg bw/day intravenous rabbit other REACH

Safety Opinions

Official safety assessments from the Scientific Committee on Consumer Safety (SCCS) and Cosmetic Ingredient Review (CIR).

cir
Verdict: safe
NOAEL: 100 mg/kg/d (oral)

ous safety assessment of aminomethyl propanediol. The Panel concluded that tromethamine, aminomethyl propanediol, and aminoethyl propanediol are safe in cosmetics in the practices of use and concentration as given in this safety assessment. Keywords cosmetics, safety, tromethamine Introduction The Cosmetic Ingredient Review (CIR) Expert Panel (Pan

Expert Verdict

Pure base solution is highly alkaline (pH 10.0 at ~100%); must avoid nitrosamine formation; erodes ordinary glass โ€” use alkaline-resistant containers

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Concern Level: None

Regulatory Flags

fragrance-component eu_children_restricted ifra_fragrance

Frequently Asked Questions

Is Tromethamine safe in cosmetics?

Pure base solution is highly alkaline (pH 10.0 at ~100%); must avoid nitrosamine formation; erodes ordinary glass โ€” use alkaline-resistant containers The EU classifies Tromethamine as "permitted". Safety rating: EXCELLENT. 9 toxicological study endpoint(s) are available in our database. This ingredient has been reviewed by cir.

Is Tromethamine allowed in the EU?

Tromethamine EU regulatory status: permitted. Maximum allowed concentration: 0.5%. This is based on EU Regulation 1223/2009 and its amendments.

What does Tromethamine do in cosmetics?

Tromethamine functions as: pH adjuster, buffering agent, fragrance ingredient. It is classified as a cosmetic ingredient in our database. CAS number: 77-86-1.

What is the Margin of Safety for Tromethamine?

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 Tromethamine?

The NOAEL (No Observed Adverse Effect Level) for Tromethamine is 500 mg/kg bw/day based on a other study via intravenous route in rabbit. A total of 9 study endpoints are available. Source: REACH.

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