| - HCl is a pale yellow liquid with a very toxic shock odor, specific gravity 1,264 at 17 ¡Æ C (compared to air). Melting point - 114.7 oC, Boiling temperature -85.2 oC. The critical temperature is 51.25 oC, the pressure is 86 at. The proportion of liquid HCl at -113 ¡Æ C is 1,267, at - 110 ¡Æ C is 1,206. In addition, the humid air evaporates into a fog due to the formation of small particles of hydrochloric acid. Dissolves a lot in water and generates heat.
- When heating concentrated hydrochloric acid, chloride gas first rises, but if the acid is very thin, water vapor rises first and the acid concentration increases. A strong inorganic acid that burns the skin and dissolves most common metals to form metal chloride salts.
- HCl vapor flying into the mouth many times for a long time will damage the teeth, falling into the eyes may be blind. |
