Synthetic dyes Flashcards
Synthetic dyes are sometimes known as
Coal Tar Dyes
Synthetic dyes are derived from the hydro-carbon benzene and are collectively known as
Aniline Dyes
substances with definite atomic groupings and are
capable of producing visible colors
Chromophores
Simple benzene compounds which contain
such substances are known as
chromogens
an auxiliary radical or substance which imparts to the compound the property of electrolytic dissociation, thereby altering the shade of the dye, enabling it to form salts with another compound, and ultimately retaining its color.
auxochrome
A dye, therefore, should consist of a
chromophore and an auxochrome
where the active coloring substance is found in the acid
component, and the inactive base
Acid Dye
usually the sodium salt of a sulfonate of rosaniline
acid fuchsin
Acid dye that has the ability to form salt with an alkali.
picric acid
only substance so far that can fix, differentiate and stain tissue all by itself
Picric acid
It may be employed as a
counterstain to basic cytoplasmic stains; (2)
- acid fuchsin in Van Gieson’s connective tissue staining
- crystal violet for the microscopic study of
fungi
used as a fixative, as a decalcifying agent, or as a tissue softener
Picric acid
type of fixed tissues that are usually take in acidic dyes more readily (3)
- Trichloracetic acid
- picric acid
- chromium-fixed
Basic cell structures (collagen, eosinophilic granules
of leukocytes, etc.) have an affinity for the ; and regarded as
Acid dye ions ; ACIDOPHILIC
the active coloring substance is found in a basic
component that combines with the acid radical (sulfuric, acetic or hydrochloric acid)
Basic Dyes
