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                               Chlorine Toxicity Data


           1. The harmful effects of chlorine as a function of its
           concentration in air is indicated below. This information was
           obtained from the Defense Intelligence Agency, Washington, D. C.
           (Tasker Number 2199, DTG: 140740Z NOV 90).


               Concentration of Chlorine               Effects


               Percent         PPM


               0.0001          1                       Threshold value for
                                                       8 hours

               0.0004          4                       Maximum exposure
                                                       hazardous limit for
                                                       39-90 minutes

(              0.001           10  -                   Immediate throat
                                                       irritation

               0.003           30                      Coughing

              - 0.004-0.006    40-60                   Dangerous,
                                                       30 minutes

               0.1             1000                    Fatal in less than
                                                       30 minutes

               0.18            1800                    Fatal in 10 minutes


           2. A number of relevant properties of chlorine are listed below.
           For purposes of comparison, the corresponding data for water or
           air are also provided.

               a. Specific gravity: 1.47 g/mb (water = 1 g/mL; therefore,
           chlorine is heavier than water)


               b. Boiling point: -30.3 degrees F (water = 212 degrees F)

               c. Vapor density: 2.5 g/L (Air = 1 g/L; therefore, chlorine
           is heavier than air)

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