Young albino rats of the Charles River strain (COBS) were used as test animals. All animals were kept under observation for five days prior to experimental use, during which period they were checked for general physical health and suitability as test animals. The animals were housed in stock cages and were permitted a standard laboratory diet plus water ad libitum, except during the 16-hour period immediately prior to oral intubation when food was withheld. Initial screening was conducted in order to determine the general level of toxicity of the test material. Selected groups of four albino rats each (two males and two females) were administered the test material at several dose levels.