The furfural

The furfural (Furfural, 2-formalpara, 2-shrilled) 5H4O2. Colourless liquid, quickly turning brown on the air with the smell of almonds, temperature melting -36,5°, temperature of boiling of 161.7°, soluble in water, alcohol, ether, benzene. Used as a solvent for paints and accelerators of vulcanization of rubber, plastics.
Enters the body in the form of vapor through the respiratory tract. Have an irritating effect on the mucous membranes.
Acute poisoning occurs irritation of mucous membrane of the nose, upper respiratory tract and eyes, salivation, nausea, a burning sensation in the throat.
Chronic poisoning marked complaints irritation of mucous membranes of the upper respiratory tract, eyes, complaining of a headache, in some cases there is a feeling of numbness of the tongue and the reduction of smell, there eczema and dermatitis. If prolonged contact with furfural workers may occur expressed yellow-brown staining of the skin mainly of palms and feet.
Prevention of poisoning: sealing equipment and mechanization of processes plum furfural, effective use of local exhaust ventilation devices, the use of industrial filter masks. Periodic preventive medical examination with the participation of therapist, neurologist, ophthalmologist, dermatologist. The maximum allowable concentration of furfural in the air of working zone 10 mg/m3.
First aid in case of poisoning: the irritation of the conjunctiva - rinsing 2% soda solution, the irritation of the mucous membrane of the respiratory tract - sodium inhalation. In severe cases, oxygen inhalation, lobeline (1% solution of 1 ml), glucose intravenously (30-40 ml of 40% solution).

The furfural - alpha - shrilled derived furan, formula With5N4About2. Colorless oily liquid rapidly darkening light. In low concentrations has a pleasant scent, like the smell of fresh rye bread, at high concentrations, unpleasant smells; temperature of boiling of 161.7 C; temperature of melting of 36.5 degrees.
In industry the furfural receive from wood processing and waste from agricultural crops (corn cobs cobs) by heating them to a temperature of 200 degrees and in the presence of mineral acids. The chemical properties of the furfural similar with aromatic aldehydes.
It is used as a solvent for paints and varnishes and as starting material in the manufacture of resins, has strong resistance(phenol-formaldehyde resin), is the initial product for some pharmacological drugs - furatsilina, furadonin.
The furfural as industrial poison. The furfural is poison for the nervous system, causing convulsions and paralysis; when ten-inhalation (conc. 0.5 mg/l) occur slight irritation of the mucous membrane of the nose, salivation, slight nausea.
Chronic poisoning (conc. 0,007-0,053 mg/l duration of up to three months) have conjunctivitis, slezotechenie, irritation of mucous membrane, headaches.
Cm. the industrial Poisons.