Water based Urethane Part A

Potential health effects

EYES: Minor transient irritation. No corneal injury likely. SKIN CONTACT: May cause allergic skin reaction in susceptible individuals. Prolonged exposure not likely to cause significant skin irritation. Repeated exposure may cause skin irritation. SKIN ABSORPTION: A single prolonged exposure is not likely to result in the material being absorbed through skin in harmful amounts. INGESTION: The LD50 for skin absorption in rabbits is 20,000 mg/kg. INHALATION: Low acute oral toxicity; LD50 (rat) greater than 4000 mg/kg. No hazards anticipated from ingestion incidental to industrial exposure. Vapors are unlikely due to physical properties. Not a problem unless heated to a high temperature. SYSTEMIC AND Except for skin sensitization, repeated exposures to low molecular weight epoxy resins of this type are not anticipated OTHER EFFECTS: to cause any significant adverse effects. A poorly characterized sample of low molecular weight epoxy resin of this type has been reported to produce skin cancer in a highly sensitive strain of mice. However, high levels of impurities compromise the validity of the findings. Epoxy resin that is representative of current manufacturing processes is not believed to be a cancer hazard to humans. Results of mutagenicity tests in animals have been negative. Has been shown to be negative in some in vitro mutagenicity tests and positive in others.