guinea-pig tests were conducted on a known photocontact allergen , tetrachlorosalicylanilide ( tcsa ) , a known phototoxin , 8-methoxypsoralen , two reportedly weak photoallergens , musk ambrette and 6-methylcoumarin , and a negative control , octylphenoxy polyethoxyethanol ( triton x-15 ) .
C0069359
octylphenoxy polyethoxyethanol
C0133689
triton x