What is Tetraphosphorus Trisulfide? Tetraphosphorus Trisulfide (P4S3) is a yellow inorganic compound developed by Henri Sevene and Emile David Cahen in 1898 as part of their invention of friction matches that did not pose the health hazards of white phosphorus. Breathing white phosphorus for long periods may cause a condition known as “phossy jaw” which […]