|
Liquid organic acids such as acetic and propanoic acids are volatile and produce acrid irritant fumes. They are toxic and corrosive if ingested and are strong skin irritants. Solid acids such as benzoic, citric and tartaric are generally non-toxic, however there are many exceptions. Halogenated organic acids such as trichloroacetic acid denature proteins and produce nasty sores, if allowed to contact the skin. These acids are not commonly found in schools and their use should be avoided. Weak organic acids, such as, phenol and phenol derivatives (e.g. chlorophenols) can produce intractable sores on the skin. Beware of phenol, in particular. People have died due to absorption of phenol through the skin in industrial accidents. Organic acids diluted in water are much less hazardous. Eye and skin protection should always be worn with volatile organic acids. Reactions should be carried out in a fume cupboard where practicable, otherwise small quantities should be used. Disposal: Water miscible organic acids not containing halogens may be disposed of down the sink (to sewer) after being neutralised to pH: 8-10. ALSO SEE SEPARATE LISTING FOR EACH CHEMICAL.
|
