Daidzein

Daidzein in plain language

What it is

Also known as 7,4'-Dihydroxyisoflavone · 4',7-DIHYDROXYISOFLAVONE · 7-Hydroxy-3-(4-hydroxyphenyl)-4H-1-benzopyran-4-one · 7-hydroxy-3-(4-hydroxyphenyl)chromen-4-one · 4',7-dihydroxy-isoflavon · 4,7-Dihydroxyisoflavone

Show all 19 names

4H-1-Benzopyran-4-one, 7-hydroxy-3-(4-hydroxyphenyl)- · 7-Hydroxy-3-(4-hydroxy-phenyl)-chromen-4-one · 7-Hydroxy-3-(4-hydroxyphenyl)-4-benzopyron · 7-hidroxi-3-(4-hidroxifenil)-4-benzopirona · 7-hydroxy-3-(4-hydroxyphenyl)-4-benzopyrone · 7-hydroxy-3-(4-hydroxyphenyl)-4H-chromen-4-one · Daidzein (Standard) · Daidzeol · Diadzein · Isoflavone, 4',7-dihydroxy- (8CI) · Daidzein (constituent of astragalus) · Daidzein (constituent of red clover) · Daidzein (constituent of soy isoflavones)

What it does

Used in cosmetics as a skin-conditioning agent.

• Skin conditioning
• Conditioner

Is it a concern?

High concern: no hazard classifications on record. It is restricted in EU cosmetics.

Why it's flagged

Daidzeol; 4',7-Dihydroxyisoflavone; 7-hydroxy-3-(4-hydroxyphenyl)-4-benzopyrone is restricted in cosmetic products under Annex III of the EU Cosmetics Regulation (EC) 1223/2009.

RestrictedEU EC — restricted

The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.

• EU Annex III — restricted
• EU restricted in cosmetics

• EU·EC

  Annex III of EU Cosmetics Regulation (EC) 1223/2009: substances which cosmetic products must not contain except subject to the restrictions laid down. Maximum concentration: 0,02 % Other conditions: From 1 February 2025 cosmetic products containing that substance and not complying with the conditions shall not be placed on the Union market. From 1 November 2025 cosmetic products containing that substance and not complying with the conditions shall not be made available on the Union market.

  restricted
  View source →

• EU·CosIng·Active2 entries

  • Restriction: III/374Source →
  • Cosmetics Regulation annex III / ref 374.Source →
• US·EPA·commercial use observedEPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Softener and conditioner.

  • EPA CPDat observed this chemical in 0 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Softener and conditioner.Source →
• US·FDA·listed in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.

  • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

No expert opinion on file for Daidzein. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

• SCCS

  EU Scientific Committee on Consumer Safety

  No SCCS opinion on file.

• CIR

  Cosmetic Ingredient Review (US expert panel)

  No CIR safety assessment on file.