formaldehyde fixative

form·al·de·hyde fix·a·tive

a widely used fixing agent for pathologic histology; the commercial solution is 37-40% formaldehyde and is known as 100% formalin or formol; a common impurity is formic acid, which must be neutralized, or the fixative made in buffer solution; tissues fixed may have a pigment artifact precipitated.
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References in periodicals archive ?
The penetration of formaldehyde fixative is rapid, and approximately half-maximum formaldehyde binding is achieved within 100 minutes of tissue immersion in the fixative (23).
Germicidal effectiveness of formaldehyde fixatives and preservatives against Bacillus anthracis in animal tissue.