Common Sunscreen Ingredients Know to Be Toxic Also Include: Benzophenones (dixoybenzone, oxybenzone) PABA and PABA esters (ethyl dihydroxy propyl PAB, glyceryl PABA, p-aminobenzoic acid padimate O or Octyl dimethyl PABA)  Cinnamates (cinoxate, ethylhexyl, p-methoxycinnamate)  Salicylates (ethylhexyl salicylate, homosalate, octyl salicylate)  Avobenzone (butyl-methyoxydibenzoylmethane; Parsol 1789)  Digalloyl trioleate  Menthyl anthranilate  Propylene Glycol: Called a humectant in cosmetics, it is industrial antifreeze, and the major ingredient in brake and hydraulic fluid. Material Data Sheets on Propylene Glycol warn to avoid skin contact as it is systemic and can cause liver abnormalities and kidney damage. If anti freeze is spilled on your garage floor and a dog or cat drinks one lick, it will kill them.