Dehydroacetic acid is a synthetic preservative that is commonly used in cosmetic and personal care products. It is effective against both Gram-positive and Gram-negative bacteria and fungi. Here are some details about dehydroacetic acid:

Positive:

• It is effective against bacteria and fungi.
• It is Ecocert and Cosmos approved.

Negative:

• There are some concerns about the safety of dehydroacetic acid, as it is a synthetic preservative.
• It is not clear whether dehydroacetic acid is safe for use during pregnancy or breastfeeding.

Ingredients or materials:

• Dehydroacetic acid is a pyran-2,4-dione and a ketone.
• It is a white crystalline powder that is soluble in water and ethanol.

Overall, dehydroacetic acid is a commonly used synthetic preservative that is effective against bacteria and fungi. While there are some concerns about its safety, it is approved by Ecocert and Cosmos and is used in many natural products.