The+Issues+of+Formaldehyde-12-3



CH 2O. As the simplest [|aldehyde], it is an important precursor to many other chemical compounds, especially for polymers. formaldehyde has IUPAC name that is methanal and the other name of formaldehyde are formol, methyl aldehyde, methylene oxide, methanal, methylene glycol. The properties of formaldehyde:
 * Formaldehyde** (systematic name: methanal) is an [|organic compound] with the __[|formula]__
 * molecular formula : CH 2O
 * molar mass : 30,03 g/mol
 * density : 1,38 g/ml
 * melting point : -92 0C (pure), −15 °C (37% solution)
 * boiling point : -21 °C (pure), 96 °C (37% solution)
 * solubility in water : very high
 * pH : 2.8 (31% solution)



The perception of formaldehyde by odor and eye irritation becomes less sensitive with time as one adapts to formaldehyde. This can lead to overexposure if a worker is relying on formaldehyde's warning properties to alert him or her to the potential for exposure.

May cause sore throat, coughing, and shortness of breath. Causes irritation and sensitization of the respiratory tract. Concentrations of 25 to 30 ppm cause severe respiratory tract injury leading to pulmonary edema and pneumonitis. May be fatal in high concentrations.
 * Inhalation:

Can cause severe abdominal pain, violent vomiting, headache, and diarrhea. Larger doses may produce decreased body temperature, pain in the digestive tract, shallow respiration, weak irregular pulse, unconsciousness and death. Methanol component affects the optic nerve and may cause blindness. Toxic. May cause irritation to skin with redness, pain, and possibly burns. Skin absorption may occur with symptoms paralleling those from ingestion. Formaldehyde is a severe skin irritant and sensitizer. Contact causes white discoloration, smarting, cracking and scaling. Vapors cause irritation to the eyes with redness, pain, and blurred vision. Higher concentrations or splashes may cause irreversible eye damage.
 * Ingestion:
 * Skin Contact:
 * Eye Contact:

Frequent or prolonged exposure to formaldehyde may cause hypersensitivity leading to contact dermatitis. Repeated or prolonged skin contact with formaldehyde may cause an allergic reaction in some people. Vision impairment and enlargement of liver may occur from methanol component. Formaldehyde is a suspected carcinogen (positive animal inhalation studies). Persons with pre-existing skin disorders or eye problems, or impaired liver, kidney or respiratory function may be more susceptible to the effects of the substance. Previously exposed persons may have an allergic reaction to future exposures. This from MSDS
 * Chronic Exposure:
 * Aggravation of Pre-existing Conditions:



Formalin besides the price is cheap, easily available and its use is not difficult so it is very desirable as a preservative by food manufacturers are not responsible. The survey results and laboratory examination showed, a number of food products using formaldehyde as a preservative.

 Suggested use of formalin is:


 * As a germ killer, which is widely used in cleaning floors, clothes, vessels and warehouses,
 * Flies and other insect repellent,
 * Any of the ingredients in the manufacture of artificial silk, dyes and explosives glass mirror,
 * Hardener layer of gelatin and photo paper,
 * Urea fertilizer ingredient, perfume, nail hardeners and preservatives cosmetic products,
 * Prevention of corrosion in oil wells,
 * Materials for insulation foam, and,
 * Plywood adhesives.

<span style="color: #f03535; font-family: 'Arial Black',Gadget,sans-serif;"> In concentrations less than 1%, formalin is used as a preservative in household cleaning, dishwashing liquid, fabric softener, car shampoo, wax, and carpet.