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Moumoujus

DIISONONYL PHTHALATE.

Avoid CAS 28553-12-0, 68515-48-0 / ANTICAKING

Diisononyl Phthalate (DINP) serves primarily as a plasticizer to enhance material flexibility and durability. In cosmetic formulations, it functions as a fragrance stabilizer, refines product texture, and may improve the penetration of other ingredients.

Summary

plasticizer fragrance stabilizer texture enhancer solvent penetration enhancer

Science

Mechanism of Action

As a plasticizer, Diisononyl Phthalate contributes to the suppleness and structural integrity of various materials. In skincare, its mechanism involves modifying a product's rheology to enhance its feel and application. It also acts as a solvent and solubilizer, potentially facilitating the improved delivery and absorption of other cosmetic components on the skin.

Research

Clinical Evidence

Insufficient-data confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Diisononyl Phthalate reacts exothermically with strong acids, generating isononyl alcohol and phthalic acid. Similar heat is produced upon interaction with caustic solutions (strong bases), indicating potential instability in extreme pH environments.

Conflicts

  • strong acids
  • caustic solutions (strong bases)

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has not explicitly reviewed Diisononyl Phthalate (DINP), though other phthalates (DBP, DMP, DEP) were deemed safe for cosmetic use. The Scientific Committee on Consumer Safety (SCCS) identified DINP at 26 mg/kg in one perfume sample and noted toxicological effects in rats following oral administration, including increased liver and kidney weights, with a No Observed Adverse Effect Level (NOAEL) of 15 mg/kg body weight/day. While the FDA states it lacks evidence of safety risk from phthalates generally used in cosmetics, Congress has banned DINP in children's toys and childcare articles exceeding 0.1%. The Australian Industrial Chemicals Introduction Scheme (AICIS) reported minimal skin and eye irritation, and a low likelihood of skin sensitization. However, Diisononyl Phthalate is listed under California Prop 65 as a chemical known to cause cancer.

Your Skin

Skin Compatibility

No Normal
No Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Avoid

Due to its classification under California Prop 65 as a known carcinogen and evidence of systemic toxicity in animal studies from the SCCS, Diisononyl Phthalate is not recommended for inclusion in Moumoujus formulations, despite minimal topical irritation concerns.

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