You can trust the time tested experience fo GFS Chemicals when it comes to your high purity acid needs. GFS Chemicals began manufacturing high purity acids in 1956. GFS PPB Part per Billion and PPT Part per Trillion acids contain virtually no trace contaminants whatsoever. High purity acid production is an art, but it is an art form which we have perfected. Today these acids are used all over the world for trace metal analysis and numerous other environmental acid applications. Acids are available in six grades and they are packaged in small bottle though bulk sizes.