Formalin

Formalin is a solution of formaldehyde in water, primarily used as a disinfectant, biocide, and fixative in microscopy and histology. It is also used in the production of resins and as a chemical intermediate.

Composition

Formalin is typically a 37% solution of formaldehyde in water, with a small amount of methanol added to inhibit polymerization. It is colorless and has a strong, pungent smell.

Uses

Formalin is widely used in biology and medicine for the preservation of tissue samples. It is also used in the production of resins, in photography, and as a disinfectant and biocide in various industries.

Health effects

Exposure to formalin can cause irritation to the eyes, nose, and throat, and can lead to respiratory problems. Long-term exposure can lead to cancer. It is classified as a Group 1 carcinogen by the International Agency for Research on Cancer.

Safety

Due to its toxic nature, formalin should be handled with care. It should be used in a well-ventilated area and protective clothing, gloves, and eye protection should be worn when handling it.

See also

• Formaldehyde
• Fixative (histology)
• Biocide
• Disinfectant

Formalin Resources
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