Related Experiment Videos
alpha, beta-Diacryloxypropionic acid, a sensitizing impurity in commercial acrylic acid
Dermatosen in Beruf Und Umwelt. Occupation and Environment
|January 1, 1984
Summary
A sensitizing compound in commercial acrylic acid was identified as alpha,beta-diacryloxypropionic acid (DAPA). Distilled acrylic acid lacks this skin irritant, suggesting purity improvements are possible.
Area of Science:
- Toxicology and Dermatology
- Chemical Synthesis and Analysis
Background:
- Commercial acrylic acid can contain constituents that cause adverse skin reactions.
- Previous quality control methods may not detect all sensitizing impurities.
- Understanding the specific sensitizing agents is crucial for product safety.
Purpose of the Study:
- To identify the strongly contact sensitizing constituent in commercial acrylic acid.
- To investigate the cause of skin reactions observed after exposure to acrylic acid.
- To evaluate the limitations of current quality control methods for acrylic acid.
Main Methods:
- Application of Freund's Complete Adjuvant Test in guinea pigs to assess skin sensitization.
- Identification of the sensitizing compound through chemical analysis, including methylation.
- Gas-chromatographic analysis to evaluate the stability and detectability of impurities.
Main Results:
- A strongly contact sensitizing constituent was discovered in commercial acrylic acid samples.
- The skin reactions were attributed to alpha,beta-diacryloxypropionic acid (DAPA).
- DAPA proved unstable and undetectable by gas chromatography using polar liquid phases.
Conclusions:
- Alpha,beta-diacryloxypropionic acid (DAPA) is the primary sensitizing agent in commercial acrylic acid.
- The instability of DAPA poses challenges for standard gas-chromatographic quality control.
- Distilled acrylic acid, free from DAPA, does not exhibit sensitizing properties.