The carbon removing compounds covered by this specification are intended for removing or loosening carbon from components of internal combustion engines and compressor sections of jet engines by means of immersion at room temperature in agitated tanks. These compounds may be used effectively in conjunction with ultrasonic cleaning devices. A 1.0 percent sodium chromate solution should be added to class 1 products to retard evaporation.

The use of type I should be limited to activities that are equipped for the disposal of phenols.

Type II is designed for use at all activities.