Liquid is clear amber colored.
Gas is greenish yellow with a sharp penetrating odor. If cylinders are involved in a fire, safely relocate or keep cool with water spray. Use self-contained breathing apparatus, protective clothing and eye protection. The irritation extends to the chest causing a cough reflex which may be violent and painful and may include the discharge of blood or vomiting with eventual collapse. Other symptoms may include headache, general discomfort and anxiety.