USG SHEETROCK Water Resistant Compound

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. Exposure to high vapor levels of ethylene glycol may cause slight headache, dizziness, nausea, drowsiness, and/or stupor.

Potential health effects

See Section 11 for more information) ACUTE : Exposure to dust generated during the sanding 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 Inhalation may occur after excessive inhalation. If respiratory symptoms persist, consult physician. Breathing of ethylene glycol vapors can cause slight headache, dizziness, nausea, drowsiness, and/or stupor. Exposure to high vapor levels may irritate the nose, throat, or upper respiratory tract. 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. Ethylene glycol vapors may cause slight temporary eye irritation. Skin None known. Ingestion None known. CHRONIC: Animal studies indicate that prolonged and repeated overexposure to ethylene glycol may cause kidney and/or liver damage and birth defects. Overexposure is highly unlikely at concentrations present in this Inhalation 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. Eyes None known. Skin None known. 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 1,4 Dioxane 2B 2 A3 Listed Acetaldehyde 2B 2 A3 Listed 1,4 Dioxane 2B 2 A3 Listed Ethylene oxide 1 A2 Listed Crystalline silica 1 A2 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. Food and Drug Administration [CFR Title 21, v.3, sec 184.1409] – Ground limestone is Generally Recognized as Safe (GRAS).

Environmental effects

Contains a nonylphenol ethoxylate (NPE). (See Section 11 for further information on NPEs.) (See Section 12 for more information)