 Two French chemists, Henri Savene and Emile David Cahen, proved in 1898 that the addition of phosphorus sesquisulfide meant that the substance was not poisonous, that it could be used in a "strike-anywhere" match, and that the match heads were not explosive.British company Albright and Wilson was the first company to produce phosphorus sesquisulfide matches commercially.The company developed a safe means of making commercial quantities of phosphorus sesquisulfide in 1899 and started selling it to match manufacturers.