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Methods of preparation Styphnic acid of high purity Sulphonation Nitration... [Pg.691]

However, high purity of styphnic acid is not required when the substance is used to produce the lead salt by the continuous method according to Meissner (Vol. HI). Some manufactures claim to achieve better results with an impure brown product of low melting point - max. 170°C. [Pg.539]

See other pages where Styphnic acid of high purity is mentioned: [Pg.170] [Pg.541] [Pg.170] [Pg.186] [Pg.170] [Pg.541] [Pg.170] [Pg.186]