To review and describe the health effects associated with exposures of the substances listed below, I used the National Library's ToxNet resource.
- Urea formaldehyde (found in a pressed board, a common building material)
Health risks associated with the exposure of this chemical include irritation of the eyes, nose and throat. The compound is considered cancerogenic and may lead to dose-related non-neoplastic nasal lesions. Non-neoplastic nasal lesions are inverted papillomas that considered benign but may cause symptoms such as pain and discomfort, epistaxis, headaches, vision changes, or nasal obstruction.
- Bleach (a cleaning/disinfectant product)
Health risks associated with the bleach also include cancerogenic risk factors. The exposures of products containing bleach may lead to adenoma and adenocarcinoma. These tumors are located in the duodenum (the first part of the small intestine immediately beyond the stomach) and are associated with DNA changes in the lining of the colon.
The most common presenting symptoms are bleeding (acute or chronic), abdominal pain and discomfort, nausea, weight loss, or intestinal obstruction.
Health risks associated with the exposure of this chemical include irritation of the eyes, nose and throat. The compound is considered cancerogenic and may lead to dose-related non-neoplastic nasal lesions. Non-neoplastic nasal lesions are inverted papillomas that considered benign but may cause symptoms such as pain and discomfort, epistaxis, headaches, vision changes, or nasal obstruction. 
Health risks associated with the bleach also include cancerogenic risk factors. The exposures of products containing bleach may lead to adenoma and adenocarcinoma. These tumors are located in the duodenum (the first part of the small intestine immediately beyond the stomach) and are associated with DNA changes in the lining of the colon. 
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