SHEETROCK HUMITEK Gypsum Panels (Including FIRECODE CORE, Type X)

SECTION 2: Hazards identification

EMERGENCY OVERVIEW: ΔWARNING! 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.

Potential health effects

See Section 11 for more information) ACUTE : Exposure to dust generated during the handling or use 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 Inhalation 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. Eyes Dust can cause mechanical irritation of eyes. If burning, redness, itching, pain or other symptoms persist or develop, consult physician. Skin None known. Ingestion None known. CHRONIC: The concentration of respirable crystalline silica measured in bulk samples of USG gypsum was less than 0.1 Wt.%. Industrial hygiene testing, following the NIOSH Method 7500, did not detect respirable crystalline silica in dust created during the cutting of USG gypsum wallboard panels by both the recommended score and snap technique and with the use of a power saw in a 10ft by 10ft room. Inhalation Panels do not release respirable dust in their installed state and therefore do not present any known

Health hazards

when installed and properly maintained. 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. Eyes None known. Skin None known. Click anywhere in this document for online articles about building interiors and interior drywall inspection, Ingestion None known. TARGET ORGANS: Eyes, skin and respiratory system.

Principle Routes of Exposure

Inhalation, eyes and skin contact CARCINOGENICITY CLASSIFICATION OF INGREDIENT(S) All substances listed are associated with the nature of the raw materials used in the manufacture of this product and are not independent components of the product formulation. All substances, if present, are at levels well below regulatory limits. See Section 11: Toxicology Information for detailed information. MATERIAL IARC NTP ACGIH CAL- 65 Crystalline silica 1 A2 Listed FibrousGlass/Continuous Filament 3 2 A4 Not Listed IARC - International Agency for Research on Cancer: 1- Carcinogenic to humans; 2A – Probably carcinogenic to humans; 2B – Possibly carcinogenic to humans; 3 - Not classifiable as a carcinogen; 4 – Probably not a carcinogen NTP – National Toxicology Program (Health and Human Services Dept., Public Health Service, NIH/NIEHS): 1- Known to be carcinogen; 2- Anticipated to be carcinogens ACGIH – American Conference of Governmental Industrial Hygienists: A1 – Confirmed human carcinogen; A2 – Suspected human carcinogen; A3 – Animal carcinogen; A4 - Not classifiable as a carcinogen; A5 – Not suspected as a human carcinogen CAL-65 – California Proposition 65 “Chemicals known to the State of California to Cause Cancer” Respirable crystalline silica IARC Group 1 carcinogen, NTP Known human carcinogen. The weight percent of crystalline silica given represents total quartz and not the respirable fraction. The weight percent of respirable silica has not been measured in this product.

Environmental effects

This product has no known adverse effect on ecology. (See Section 12 for more information.)