Pigments & Colorants
REACH
Pyrene
CAS Number
129-00-0
EC Number
204-927-3
What is Pyrene?
Pyrene (CAS 129-00-0), also known as Benzo[def]phenanthrene, is a polycyclic aromatic hydrocarbon sourced primarily as a byproduct of coal tar processing.
Where is Pyrene used?
- Fluorescent dye intermediate and reference compound in analytical and colorant chemistry
- Textile and leather dyeing: precursor in the synthesis of vat dyes and fluorescent colorants requiring high wash and light fastness
- Coatings and printing inks: pyrene-derived pigments for intense fluorescent effects
- Adhesives and sealants: pyrene-based compounds contribute to UV-traceable systems for quality inspection and bond verification
- Paper and packaging: pyrene-derived fluorescent agents are incorporated into security printing applications where optical detection is required for authentication.
Commercial specifications
- Technical grade: purities of 98% and above
- Higher-purity grades for analytical reference standards in laboratory and quality control settings
Other Names (Synonyms)
Benzo[def]phenanthrene|Pyren|beta-Pyrene|9E0T7WFW93
What are the physical properties of Pyrene?
Melting Point 151.2 °C
Boiling Point 404 °C @ Press: 760 Torr
Density 1.271 g/cm³ @ Temp: 23 °C
Flash Point 210 °C
Appearance Pyrene is a colorless crystalline solid when pure or pale yellow plates (impure). Polycyclic aromatic hydrocarbons (PAHs) are compounds containing multiple benzene rings and are also called polynuclear aromatic hydrocarbons. Solids and solutions have a Blue fluores- cence (Merck Index).
Color Pale yellow to yellow-greenish
Form crystalline
Water Solubility almost insoluble
Vapor Pressure 180 at 25 °C (extrapolated from vapor pressures determined at higher temperatures, Tesconi andYalkowsky, 1998)
Refractive Index 1.8520 (estimate)
Log P 5.43 at 30℃ and pH5-8
How is Pyrene classified and handled safely? Learn More
Warning
GHS07· Irritant GHS09· Environmental Hazard
Hazard Statements
H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation
H400 Very toxic to aquatic life
H410 Very toxic to aquatic life with long lasting effects
Precautionary Statements
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P271 Use only outdoors or in a well-ventilated area.
P273 Avoid release to the environment.
Which trade and regulatory codes apply to Pyrene?
HS Code 29349990
UN Number 3077
ADR Class 9
Packing Group III
Storage Class 11 - Combustible Solids
WGK (Germany) 2