National Toxicology Program

National Toxicology Program

Testing Status of Isodecyl Diphenyl Phosphate - M20299


CASRN: 29761-21-5

Formula: C22-H31-O4-P

Synonyms/Common Names

  • Flame Retardant 1
  • IDDP
  • Phosphoric acid, isodecyl diphenyl ester (9CI)

Known Uses

Plasticizer for biodegradable tampon ejectors

Chemical Properties

Toxicity Effects (HSDB)

Nomination Background

Planned Carcinogenicity/Toxicity

  • Selected (C20717)  

    Short-Term Toxicity

    • 5 days (Gavage)  (C20299)  Completed 
      • Rats: Harlan Sprague-Dawley
      • Dose: 0, 0.169, 0.338, 0.675, 1.35, 2.70 mMol/kg; 5/species/dose.

    Special Studies

    • C. elegans  (W20299)  Completed 
      • C. elegans

    Genetic Toxicology

    • Salmonella  (083218)  Completed 
      • Citation: Zeiger E, Anderson B, Haworth S, Lawlor T, Mortelmans K, Speck W. Salmonella mutagenicity tests: III. Results from the testing of 255 chemicals. Environ Mutagen. 1987;9 Suppl 9:1-109.
      •  Negative 


    • Microarray Analysis (Gavage) Selected (T20299)  
      • Rats: Harlan Sprague-Dawley
    NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.