fixative is the very important in histopathology laboratory technician

1. Formaldehyde is a natural component of the environment and the human body. It biodegrades readily
in air, water and soil under both aerobic and anaerobic conditions. In the air, formaldehyde breaks down
in sunlight to form carbon monoxide and formic acids, a component of acid rain.
When formaldehyde is present in the air at levels higher than 0.1 parts per million (ppm), some
people may have health effects,such as:
 watery eyes.
 burning sensations of the eyes,nose, and throat.
 coughing.
 wheezing.
 nausea.
 skin irritation.
Formaldehyde is a highly toxic systemic poison that is absorbed well by inhalation. The vapor is a
severe respiratory tract and skin irritant and may cause dizziness or suffocation. Contact
with formaldehyde solution may cause severe burns to the eyes and skin.
Formalin: A 37% aqueous (water) solution of formaldehyde,a pungent gas,with the chemical formula
HCHO,used as an antiseptic, disinfectant, and especially today as a fixative for histology (the study of
tissues under the microscope).
Is formalin used to preserve milk?
Most recent answer. Dear, formalin (40% formaldehyde) is used as a milk preservative for a duration
of 7 days when added at 1 in 10, n000 parts of milk. formalin binds with protein and affects biological
and functional properties of proteins.
Why formalin is added in milk ?
Formalin is used as an antiseptic, disinfectant and preservative. It is used as an adulterant in milk to
increase the shelf life for long distance transportation of milk without refrigeration, saving the supplier a
neat packet by cutting electricity costs. That is highly toxic causes liver and kidney damages.
Howdo test for formalin in milk?
Detection of Formalin:
Measure out 2ml milk into a test tube. Gently add 2ml of 90% Sulphuric acid and ferric chloride mixture
into the test tube. Formation of purple color ring at the interface of two layers indicates that the milk is
adulterated with formalin
Formaldehyde is a water-soluble gas that normally deposits in the upper respiratory tract. Adsorption
of formaldehyde to particles could carry it deeper into the lungs and alter its toxic action. Alveolar
macrophages in the lower respiratory tract protect the lungs from inhaled microorganisms.
Preparedby
Ojara simonpeter+256394852572
Laboratory technician