USG No

SECTION 2: Hazards identification

INFORMATION FOR HANDLING AND IDENTIFICATION OF CHEMICAL HAZARDS 0 = Minimal Hazard

NFPA Ratings

HIMS Ratings: 1 = Slight Hazard Health: 0 Health: *0 2 = Moderate Hazard Fire: 0 Fire: 0 3 = Serious Hazard Reactivity: 0 Reactivity: 1 PERSONAL PROTECTIONLE | 4 = Severe Hazard Personal Protection: Use eye and skin protection. Use NIOSH/MSHA-approved respiratory protection when necessary. *Respirable crystalline silica can cause lung disease and/or cancer. E — Safety glasses, gloves and dust respirator EMERGENCY OVERVIEW This product is not expected to produce any unusual hazards during normal use. Exposure to high dust levels may irritate the skin, eyes, nose, throat, or upper respiratory tract. When mixed with water, this material hardens and becomes very hot — sometimes quickly. DO NOT attempt to make a cost enclosing any part of the body using this material. MATERIAL SAFETY DATA SHEET MSDS # 52-100-007 USG® No. 1 Casting Plaster Page 2 of 8 SECTION 3 HAZARD IDENTIFICATION (continued)

Potential health effects

ACUTE: Eyes: Direct contact can cause mechanical irritation of eyes. If burning, redness, itching, pain or other symptoms persist or develop, consult physician. Skin: When mixed with water, this material hardens and becomes very hot — sometimes quickly. DO NOT attempt to make a cost enclosing any part of the body using this material. Failure to follow these instructions can cause severe burns that may require surgical removal of affected tissue or amputation of limb. Direct, prolonged or repeated contact with the skin may cause irritation. Rinse with water until skin is free of material to avoid irritation, then wash skin thoroughly with mild soap and water. Repeated exposure may dry skin. Inhalation: Dust exposures generated during the handling of the product may irritate eyes, skin, nose, throat, and upper respiratory tract. Persons subjected to large amounts of this dust will be forced to leave area because of nuisance conditions such as coughing, sneezing and nasal irritation. Labored breathing may occur after excessive inhalation. If respiratory symptoms persist, consult physician. Ingestion: Unlikely to occur, but if ingested may cause gastric disturbances if swallowed. Plaster of paris is non-toxic, however, ingestion of a sufficient quantity could lead to mechanical obstruction of the gut, especially the pyloric region. See First Aid Measures - Ingestion (Section 4). CHRONIC: Inhalation: Testing of dust from USG plaster of paris has not detected respirable crystalline silica. Exposures to respirable crystalline silica are not expected during the normal use of this product; however, actual levels must be determined by workplace hygiene testing. The weight percent of respirable crystalline silica has not been measured in this product. Prolonged and repeated exposure to airborne free respirable crystalline silica can result in lung disease (i.e., silicosis) and/or lung cancer. The development of silicosis may increase the risks of additional health effects. The risk of developing silicosis is dependent upon the exposure intensity and duration. Skin: Repeated contact may dry the skin, causing cracking or dermatitis. Sensitive individuals may develop an allergic dermatitis. Eyes: No known effects. Ingestion: No known effects. TARGET ORGANS: Eyes, skin and respiratory system.

Principle Routes of Exposure

Inhalation, eyes and skin contact