APPENDIX B—PHYSICAL PROPERTIES AND PHYSIOLOGICAL EFFECTS OF SULFUR DIOXIDE

Physical Data

Chemical Name: Sulfur Dioxide.

CAS Number 7446-09-05.

Synonyms: Sulfurous anhydride, sulfurous oxide.

Chemical Family: Inorganic.

Chemical Formula: SO₂.

Normal Physical State: Colorless gas appreciably heavier than air. Vapor density (specific gravity) at 32^CF (0°C) and 1 atmosphere - 2.26.

Boiling Point: 14°F(-10.0°C).

Flammable Limits: Non-flammable (produced from burn­ing hydrogen sulfide).

Solubility: Readily soluble in water and oil; solubility de­creases as the fluid temperature increases.

Odor and Warning Properties: Sulfur dioxide has a pun­gent odor associated with burning sulfur. It produces a suffo­cating effect and produces sulfurous acid on membranes of the nose and throat.