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The Determination of Free Benzidine in Dyes

Methods for the quantitative determination of benzidine have been assessed and a convenient method for the analysis of trace amounts of this compound in dyes has been developed. The method of analysis has been applied to some forty dyes all of which require the use of benzidine in their manufacture. Results are discussed in terms of possible future regulations. Includes correspondence (JSDC, Vol. 97, April 81, p. 185)

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