Final safety assessment of thiodipropionic acid and its dialkyl esters as used in cosmetics.
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.
Diamante
Catherine
C
Cosmetic Ingredient Review, Washington, DC 20036, USA.
Fiume
Monice Zondlo
MZ
Bergfeld
Wilma F
WF
Belsito
Donald V
DV
Hill
Ronald A
RA
Klaassen
Curtis D
CD
Liebler
Daniel C
DC
Marks
James G
JG
Shank
Ronald C
RC
Slaga
Thomas J
TJ
Snyder
Paul W
PW
Alan Andersen
F
F
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
D003358:Cosmetics; D004952:Esters; D011422:Propionates; D011994:Recombinant Proteins; D014409:Tumor Necrosis Factor-alpha; C013298:thiodipropionic acid