Rigid polyisocyanurate foam panels

2.1 Classification of the substance or mixture

Not a hazardous substance or mixture

2.2 Label elements

Not a hazardous substance or mixture WHMIS: In Canada, the product mentioned above is not considered hazardous under the Workplace Hazardous Materials Information System (WHMIS) No unusual conditions are expected from this product. Freshly expanded or heated foam may off-gas some pentane-blowing agent, which is heavier than air and may accumulate to ignitable concentrations if stored inside a sealed container or within confined areas. Ignitable atmospheres have concentrations that exceed inhalation exposure limits for workers, further reinforcing the need for ventilation when foam is freshly expanded. With the exception of the blowing agent, this product does not present an inhalation, ingestion, or contact health hazard unless subjected to operations such as sawing, sanding, or machining that result in the generation of airborne particulates (dusts). Exposure to high dust levels may irritate the skin, eyes, nose, throat, or upper respiratory tract. Inhalation of high amounts of dust over long periods may overload lung clearance mechanisms and make lungs more vulnerable to respiratory disease. [See Section 3 of this SDS for other exposure limit standards for the product ingredients.] Canadian users: LD50 and LC50 data are listed below for the constituent(s) that are available. LC50 LD50 Hodge & Sterner classes mg/(m3 air) mg/(kg body wgt.) (inhalation) (oral) Pentanes 364,000 (rat, inh, 4hr) 446 (mouse, i.v.) relatively harmless insufficient data 42 (mouse, oral) Formaldehyde 400 (mouse, inh, 2hr) 100 (rat, oral) moderately toxic

Potential health effects

Primary Means of Exposure: Inhalation of particulates Secondary Means of Exposure: Eye and skin contact with particulates and inhalation of vapors INHALATION HEALTH HAZARDS: For polyiso foam (generated dust and residual vapor) and for organics in facers (generated dusts) Acute: Dust may cause transient mechanical irritation of the upper respiratory tract. Workplace exposures to residual pentane vapors from this product are expected to be below levels of any health risk. Overexposure to high concentrations of pentane can cause narcotic effects. Signs and symptoms of overexposure to pentane include headache, nausea, dizziness, difficulty walking, or sleepiness. Studies have shown that short-term (10-minute) exposures to pentane concentrations as high as 5,000 ppm (11,750 mg/m3) produced no symptoms. Workplace exposure limits for pentane and other organic components are provided in table below. Chronic: There is no evidence that dusts generated from these products cause disease in humans. Facer dusts containing carbon black pigment are not analogous to the raw carbon black powders for which human carcinogenicity is suspected. No chronic effects are known for exposures to pentane vapor. For continuous filament glass fibers in facers (generated dust) Acute: Airborne fragments of glass fibers may cause mechanical irritation of the upper respiratory tract, particularly mouth, nose and throat; glass dust may cause transient irritation of the upper respiratory tract. Workplace exposure limits are provided in table below. Chronic: No chronic health effects are known to be associated with exposure to glass fibers. Results from epidemiological studies have not shown any increase in respiratory disease or cancer. The International Agency for Research on Cancer has classified continuous filament fiberglass ―Not Classifiable as to Carcinogenicity to Humans‖ (Group 3). EYE CONTACT HEALTH HAZARDS: Acute: Mechanical irritation, redness, tearing, and blurred vision can occur if dusts generated from these products come into contact with eyes. Chronic: None known. SKIN CONTACT HEALTH HAZARDS: Acute: Direct contact with rough-cut foam or felt facers can cause mechanical abrasion cuts or puncture to fingers, hands or exposed skin. Chronic: None known. SIGNS AND SYMPTOMS OF EXPOSURE: Irritation of the upper respiratory tract, eyes, and/or skin.

Medical Conditions Generally Aggravated by Exposure

Any condition generally aggravated by mechanical irritants in the air or on the skin. Specific data are not available which address medical conditions that are generally recognized as being aggravated by exposure to this product. CARCINOGENICITY: Ingredient: Textile Fibrous Glass NTP: Not Listed IARC: Not Classifiable – Group 3 OSHA: Not Listed Mutagenicity: None

Teratogenic Effects

None Reproductive Toxicity: None California Proposition 65: WARNING: This product can expose you to chemicals including quartz, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov ACFoam®-II does not contain any quartz compounds in the closed-cell polyisocyanurate foam core. However, there is a trace amount in the glass fiber reinforced felt facer that is bonded to the foam core.