2,3-Dimethyl-4-formyl-1-phenyl-5-pyrazolone

INCI: 2,3-DIMETHYL-4-FORMYL-1-PHENYL-5-PYRAZOLONE

CAS Number
Not confirmed in available databases - structurally related to 4-amino-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one (CAS 83-07-8)
Function
Hair dyeing - pyrazolone-type oxidative hair dye coupler
Safety Rating
MODERATE

Regulatory Status

๐Ÿ‡ช๐Ÿ‡บ EU Status restricted
๐Ÿ‡บ๐Ÿ‡ธ US Status permitted
US Notes Coal-tar hair dye exemption under FD\&C Act ยง 601(a); requires caution labeling

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

Safety Data

Margin of Safety (MoS)
not established
Dermal Absorption
moderate
Sensitization
moderate

Calculate MoS for your specific formulation with the MoS Calculator.

Expert Verdict

Formyl (aldehyde) group on pyrazolone ring - reactive electrophile; mandatory patch test labeling; limited independent safety data

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Concern Level: Moderate

Frequently Asked Questions

Is 2,3-Dimethyl-4-formyl-1-phenyl-5-pyrazolone safe in cosmetics?

Formyl (aldehyde) group on pyrazolone ring - reactive electrophile; mandatory patch test labeling; limited independent safety data The EU classifies 2,3-Dimethyl-4-formyl-1-phenyl-5-pyrazolone as "restricted". Safety rating: MODERATE.

Is 2,3-Dimethyl-4-formyl-1-phenyl-5-pyrazolone allowed in the EU?

2,3-Dimethyl-4-formyl-1-phenyl-5-pyrazolone EU regulatory status: restricted. This is based on EU Regulation 1223/2009 and its amendments.

What does 2,3-Dimethyl-4-formyl-1-phenyl-5-pyrazolone do in cosmetics?

2,3-Dimethyl-4-formyl-1-phenyl-5-pyrazolone functions as: Hair dyeing - pyrazolone-type oxidative hair dye coupler. It is classified as a cosmetic ingredient in our database. CAS number: Not confirmed in available databases - structurally related to 4-amino-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one (CAS 83-07-8).

What is the Margin of Safety for 2,3-Dimethyl-4-formyl-1-phenyl-5-pyrazolone?

not established 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.

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