Poor Cosmetic Ingredient NOAEL Data GHS Classified

Isophorone Diisocyanate

INCI: ISOPHORONE DIISOCYANATE

CAS Number
4098-71-9
Function
Film forming (polyurethane precursor/monomer)
Safety Rating
POOR

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status restricted
๐Ÿ‡บ๐Ÿ‡ธ US Status restricted
US Notes Permitted as polyurethane precursor; CIR Panel requires no detectable residual isocyanate in finished polyurethane

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

Safety Data

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

Calculate MoS for your specific formulation with the MoS Calculator.

Toxicological Studies

2 study endpoints found for Isophorone Diisocyanate. 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 0.64 2104 1991 rat inhalation REACH
NOAEL 0.525 2104 1991 rat inhalation REACH

GHS Hazard Classification

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

Signal Word
DANGER
Pictograms
corr; skull;toxic; cancer;health haz
Hazard Statements
Fatal if inhaled Harmful in contact with skin Causes severe skin burns and eye damage May cause allergic or asthmatic symptoms or breathing difficulties if inhaled May cause allergic skin reaction
Short-term Exposure Effects
The substance is corrosive to the skin. The substance is severely irritating to the eyes. The aerosol is irritating to the respiratory tract.
Long-term Exposure Effects
Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation may cause asthma. See Notes.
Routes of Exposure
The substance can be absorbed into the body by inhalation of its aerosol and through the skin.

Expert Verdict

Must not be present as free monomer in finished cosmetic product; CIR mandates no detectable residual isocyanate (HPLC-MS detection limit 5 ppm); REACH Entry 74 restricts diisocyanates; respiratory sensitization incidence 16โ€“70 per 10,000 exposed workers/year

โš ๏ธ
Concern Level: High

Regulatory Flags

potential-allergen

Frequently Asked Questions

Is Isophorone Diisocyanate safe in cosmetics?

Must not be present as free monomer in finished cosmetic product; CIR mandates no detectable residual isocyanate (HPLC-MS detection limit 5 ppm); REACH Entry 74 restricts diisocyanates; respiratory sensitization incidence 16โ€“70 per 10,000 exposed workers/year The EU classifies Isophorone Diisocyanate as "restricted". Safety rating: POOR. 2 toxicological study endpoint(s) are available in our database.

Is Isophorone Diisocyanate allowed in the EU?

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

What does Isophorone Diisocyanate do in cosmetics?

Isophorone Diisocyanate functions as: Film forming (polyurethane precursor/monomer). It is classified as a cosmetic ingredient in our database. CAS number: 4098-71-9.

What is the Margin of Safety for Isophorone Diisocyanate?

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 Isophorone Diisocyanate?

The NOAEL (No Observed Adverse Effect Level) for Isophorone Diisocyanate is 0.64 2104 based on a inhalation study via 1991 route in rat. A total of 2 study endpoints are available. Source: REACH.

Is Isophorone Diisocyanate classified as hazardous under GHS?

Isophorone Diisocyanate carries a GHS signal word of "DANGER". Hazard statements: Fatal if inhaled Harmful in contact with skin Causes severe skin burns and eye damage May cause allergic or asthmatic symptoms or breathing difficulties if inhaled May cause allergic skin reaction. This classification is based on the ILO/WHO International Chemical Safety Card and ECHA C&L inventory data. Note: GHS classification applies to the pure substance โ€” at cosmetic use concentrations, hazard thresholds may not be met.

๐Ÿ“ฑ

Is Isophorone Diisocyanate 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 Isophorone Diisocyanate in your formulation.