Special Provision: T20

Titanium tetrachloride

Thiophosgene

Tetranitromethane

Sulfuric acid, fuming with 30 percent or more free sulfur trioxide

Sulfur trioxide, stabilized

Sulfuric acid, fuming with less than 30 percent free sulfur trioxide

Sulfur chlorides

n-Propyl isocyanate

n-Propyl chloroformate

Phosphorus trichloride