Acrid, tarry, darkly aromatic. The thick residue of coal distillation — naphthalene mothballs, creosote, and the bitter smell of industrial distillation.
Acrid, tarry, with a naphthalene-mothball edge and dark aromatic complexity. Heavier and more chemical than birch tar, less organic than cade oil. The PAH content gives it a specific industrial-chemical character. At extreme dilution, a warm, dark, slightly sweet-balsamic quality can emerge.
Evolution over time
Immediately
Immediately
Acrid tarry-naphthalene blast, dark and chemical
After a few hours
After a few hours
Dense, dark-aromatic warmth
After a few days
After a few days
Persistent tarry-phenolic residue
The Full Story
Coal tar pitch is the heavy, viscous residue left after the distillation of coal tar — itself a byproduct of coal gasification or coking. The material is a complex mixture of polycyclic aromatic hydrocarbons (PAHs), phenols, and heterocyclic compounds. Its smell is aggressively industrial: tarry, acrid, and darkly aromatic.
The dominant aroma compounds include naphthalene (mothball-like), phenanthrene, anthracene, and various cresols. The smell is familiar from old railway sleepers, tarred roads, and creosote-treated wood. It is a quintessentially industrial-Victorian olfactory signature.
In perfumery, coal tar pitch represents the extreme dark end of the smoky-tarry spectrum. It is rarely used literally (many PAHs are carcinogenic) but is evoked conceptually using safer alternatives like cade oil, birch tar, and specific synthetics.
Coal tar was the source of the first synthetic dye (mauveine, discovered by William Henry Perkin in 1856) and the first synthetic fragrance chemicals. The entire modern synthetic perfumery industry has its roots in coal tar chemistry — coumarin, vanillin, and many early synthetics were originally derived from coal tar fractions.
Extraction & Chemistry
Extraction method: Coal tar pitch is the residue of coal tar distillation — an industrial process, not a perfumery extraction. The tar is obtained by destructive distillation of coal at 1,000-1,200 degrees C. For perfumery, safer alternatives (cade oil, birch tar oil) provide similar olfactory effects without the carcinogenic PAH content.
Molecular Formula
Complex mixture (no single formula)
CAS Number
65996-93-2
Botanical Name
N/A — pyrolysis product of coal
IFRA Status
No known restrictions
Synonyms
COAL TAR · TAR PITCH
Physical Properties
Odor Strength
Medium
Lasting Power
> 200 hours
Appearance
Colorless to pale yellow clear liquid
Specific Gravity
1.15 to 1.40 @ 25°C
In Perfumery
Coal tar pitch is an extreme conceptual note referenced in dark-industrial compositions. Due to carcinogenicity of PAH compounds, actual coal tar pitch is not used in fine perfumery. The effect is approximated using cade oil, birch tar oil, naphthalene-type synthetics (at safe levels), and dark-tarry materials. Functions as a background darkness in leather, industrial, and Victorian-themed compositions.
