MSDS material safety data sheet, Cat. Supergrade A Cat. Paraformaldehyde will off-gas formaldehyde. Hazards Identification Paraformaldehyde is a white, free-flowing solid with a strong, pungent formaldehyde odor. Combustible-dust from this product can form an explosive organic dust cloud.
Dust can cause drying, cracking and scaling.
May cause severe irritation. Exposure to high vapor concentrations, or to dust, causes irritation and tearing. Can cause inflammation of lining of nose, throat and lungs. Signs and symptoms of pulmonary edema can be delayed for several hours. Severe stomach pains follow with possible loss of consciousness.