Excellent Humectant NOAEL Data GHS Classified SCCS/CIR Reviewed Dermal Penetration

Glycerin

INCI: GLYCERIN

CAS Number
56-81-5
Function
Humectant that attracts water from dermis and environment into the epidermis. Also functions as solvent and viscosity modifier. Does not form an occlusive film.
Safety Rating
EXCELLENT

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status permitted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes FDA GRAS. CIR reviewed. One of the most used cosmetic humectants. Hygroscopic โ€” pulls water into stratum corneum rather than forming a physical barrier.

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

Safety Data

Margin of Safety (MoS)
adequate
Dermal Absorption
moderate
Sensitization
none

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

10 study endpoints found for Glycerin. 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 20000 mg/kg bw/day oral rat Short Term Toxicity COSMOS_DB
NOAEL 5000 mg/kg bw/day oral rabbit Short Term Toxicity COSMOS_DB
NOAEL 2000 mg/kg bw/day oral rat Short Term Toxicity COSMOS_DB
NOAEL 1000 mg/kg bw/day oral dog Subchronic COSMOS_DB
NOAEL 9000 mg/kg bw/day oral dog Chronic COSMOS_DB
NOAEL 4000 mg/kg bw/day oral guinea pig Short Term Toxicity COSMOS_DB
NOAEL 2000 mg/kg bw/day oral rabbit Short Term Toxicity COSMOS_DB
NOAEL 5000 mg/kg bw/day oral rat Chronic COSMOS_DB
NOAEL 10000 mg/kg bw/day oral rat Chronic COSMOS_DB
NOAEL 20000 mg/kg bw/day oral rat Chronic COSMOS_DB

GHS Hazard Classification

Globally Harmonized System classification per ECHA C&L inventory and ILO/WHO International Chemical Safety Cards.

Safety Opinions

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

cir
Verdict: safe
NOAEL: 10 mg/kg (oral)

(Panel) reviewed relevant animal and human data. The Panel concluded that glycerin is safe as a cosmetic ingredient in the practices of use and concentration described in this safety assessment. Keywords cosmetics, safety, glycerin Introduction This is a review of the available scientific

cir
Verdict: safe
NOAEL: 0.167 mg/L (inhalation)

(Panel) reviewed relevant animal and human data. The Panel concluded that glycerin is safe as a cosmetic ingredient in the practices of use and concentration described in this safety assessment. Keywords cosmetics, safety, glycerin Introduction This is a review of the available scientific

cir
Verdict: safe
NOAEL: 0.167 mg/L (oral)

(Panel) reviewed relevant animal and human data. The Panel concluded that glycerin is safe as a cosmetic ingredient in the practices of use and concentration described in this safety assessment. Keywords cosmetics, safety, glycerin Introduction This is a review of the available scientific

cir
Verdict: safe
NOAEL: 15 g/kg (oral)

(Panel) reviewed relevant animal and human data. The Panel concluded that glycerin is safe as a cosmetic ingredient in the practices of use and concentration described in this safety assessment. Keywords cosmetics, safety, glycerin Introduction This is a review of the available scientific

cir
Verdict: safe
NOAEL: 1310 mg/kg/d (oral)

(Panel) reviewed relevant animal and human data. The Panel concluded that glycerin is safe as a cosmetic ingredient in the practices of use and concentration described in this safety assessment. Keywords cosmetics, safety, glycerin Introduction This is a review of the available scientific

Dermal Penetration Profile

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

Absorption %
5-12%
Penetration Level
stratum-corneum
Penetration Depth
stratum corneum/epidermis
Molecular Weight
92.1 Da
Log P
-1.76
Systemic Absorption
minimal
Topical Bioavailability
3-10%
Safety Margin Factor
low

Source: CIR

Expert Verdict

Foundational humectant ingredient with hygroscopic mechanism that increases stratum corneum water content rather than forming an occlusive film. FDA GRAS and CIR reviewed with no safety or regulatory concerns. Suitable for all skin types including sensitive, atopic, and acne-prone skin.

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Concern Level: None

Regulatory Flags

eu_children_restricted epa_safer_alternative ifra_fragrance fda_food_additive

Frequently Asked Questions

Is Glycerin safe in cosmetics?

Foundational humectant ingredient with hygroscopic mechanism that increases stratum corneum water content rather than forming an occlusive film. FDA GRAS and CIR reviewed with no safety or regulatory concerns. Suitable for all skin types including sensitive, atopic, and acne-prone skin. The EU classifies Glycerin as "permitted". Safety rating: EXCELLENT. 10 toxicological study endpoint(s) are available in our database. This ingredient has been reviewed by cir.

Is Glycerin allowed in the EU?

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

What does Glycerin do in cosmetics?

Glycerin functions as: Humectant that attracts water from dermis and environment into the epidermis. Also functions as solvent and viscosity modifier. Does not form an occlusive film.. It is classified as a Humectant in our database. CAS number: 56-81-5.

What is the Margin of Safety for Glycerin?

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 Glycerin?

The NOAEL (No Observed Adverse Effect Level) for Glycerin is 20000 mg/kg bw/day based on a Short Term Toxicity study via oral route in rat. A total of 10 study endpoints are available. Source: COSMOS_DB.

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