Ketones and derivatives

3-Carboxy-a-methyl-benzeneacetic acid (3CMA) is an impurity in the synthesis of 3,4-methylenedioxyphenylacetone. It is a preservative that has been analysed as a potential source of contamination in pharmaceutical preparations. 3CMA has been shown to be effective at inhibiting the growth of bacteria, yeast and moulds. The analysis time for 3CMA is typically 8 hours or less. The parameters that are used to analyse 3CMA include the use of acetonitrile, optimal porosity and efficiency. The analytical methods used for 3CMA include chromatographic and chromolith methods.

3-Chloro-4-hydroxyacetanilide is a chemical compound that belongs to the class of acetanilides. It has long-term toxicity and is used as a drug substance in the production of aniline derivatives. 3-Chloro-4-hydroxyacetanilide has been shown to be carcinogenic in hamsters. The long term exposure to this chemical was shown to cause liver damage and increased incidence of tumours in rats. This drug also contains impurities and traces of chloride, chlorine, and thionyl chloride, which are toxic substances that can cause irritation or burns on contact with skin or eyes.