title: Final safety assessment of thiodipropionic acid and its dialkyl esters as used in cosmetics.
abstract: Dilauryl thiodipropionate (DLTDP), dicetyl thiodipropionate, dimyristyl thiodipropionate, distearyl thiodipropionate, and ditridecyl thiodipropionate are dialkyl esters of their respective alcohols and thiodipropionic acid (TDPA) used in cosmetics. Ingested DLTDP was excreted in the urine as TDPA. Single-dose acute oral and parenteral studies and subchronic and chronic repeated dose oral studies did not suggest significant toxicity. Neither DLTDP nor TDPA was irritating to animal skin or eyes and they were not sensitizers. TDPA was neither a teratogen nor a reproductive toxicant. Genotoxicity studies were negative for TDPA and DLTDP. Clinical testing demonstrated some evidence of irritation but no sensitization or photosensitization. The Cosmetic Ingredient Review Expert Panel considered that the data from DLTDP reasonably may be extrapolated to the other dialkyl esters and concluded that these ingredients were safe for use in cosmetic products that are formulated to be nonirritating.
authors.affiliation: Cosmetic Ingredient Review, Washington, DC 20036, USA.
authors.forename: Catherine
authors.initials: C
authors.lastname: Diamante
authors.forename: Monice Zondlo
authors.initials: MZ
authors.lastname: Fiume
authors.forename: Wilma F
authors.initials: WF
authors.lastname: Bergfeld
authors.forename: Donald V
authors.initials: DV
authors.lastname: Belsito
authors.forename: Ronald A
authors.initials: RA
authors.lastname: Hill
authors.forename: Curtis D
authors.initials: CD
authors.lastname: Klaassen
authors.forename: Daniel C
authors.initials: DC
authors.lastname: Liebler
authors.forename: James G
authors.initials: JG
authors.lastname: Marks
authors.forename: Ronald C
authors.initials: RC
authors.lastname: Shank
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Slaga
authors.forename: Paul W
authors.initials: PW
authors.lastname: Snyder
authors.forename: F
authors.initials: F
authors.lastname: Alan Andersen
mesh_terms: D000818:Animals; D003358:Cosmetics; D004952:Esters; D007928:Lethal Dose 50; D051379:Mice; D011422:Propionates / Q000008:administration & dosage / Q000633:toxicity*; D051381:Rats; D011994:Recombinant Proteins / Q000008:administration & dosage; D014409:Tumor Necrosis Factor-alpha / Q000008:administration & dosage
chemical_list: D003358:Cosmetics; D004952:Esters; D011422:Propionates; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha; C013298:thiodipropionic acid