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Pyrene

CAS Number
129-00-0
EC Number
204-927-3
Chemical Formula
C16H10
Molecular Weight
202.25 g/mol

Description

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. It is used commercially as a fluorescent dye intermediate and as a reference compound in analytical and colorant chemistry. In textile and leather dyeing, pyrene serves as a precursor in the synthesis of vat dyes and fluorescent colorants that require high wash and light fastness. Coatings and printing ink formulators use pyrene-derived pigments to achieve intense fluorescent effects. These specialty inks and UV-reactive surface coatings are essential for high-performance industrial applications. In adhesives and sealant formulations, pyrene-based compounds contribute to UV-traceable systems used for quality inspection and bond verification. These systems are critical for industrial assembly where precision is required. Paper and packaging manufacturers incorporate pyrene-derived fluorescent agents into security printing applications where optical detection is required for authentication. Pyrene is supplied as a pale yellow to off-white crystalline powder or as flakes. Technical grade material is the standard commercial form, typically available at purities of 98% and above for various industrial manufacturing processes. Higher-purity grades are available for use as analytical reference standards in laboratory and quality control settings. Our material meets rigorous internal specifications to ensure consistent performance across all chemical synthesis and dyeing applications. Contact us for supply of Pyrene Request Quote

Other Names (Synonyms)

Benzo[def]phenanthrene | Pyren | beta-Pyrene | 9E0T7WFW93

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point151.2 °C
Boiling Point404 °C @ Press: 760 Torr
Density1.271 g/cm³ @ Temp: 23 °C
Flash Point210 °C
AppearancePyrene 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).
ColorPale yellow to yellow-greenish
Formcrystalline
Water Solubilityalmost insoluble
Vapor Pressure180 at 25 °C (extrapolated from vapor pressures determined at higher temperatures, Tesconi andYalkowsky, 1998)
Refractive Index1.8520 (estimate)
Log P5.43 at 30℃ and pH5-8

Safety & Handling

Warning
GHS07· IrritantGHS09· Environment

Hazard Statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary Statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash … thoroughly after handling.
P271Use only outdoors or in a well-ventilated area.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P319Get medical advice/attention if you feel unwell.
P321Specific treatment (see … on this label).
P391Collect spillage.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317Get emergency medical help.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P364Take off contaminated clothing and wash it before reuse.
P233Store in a well-ventilated place. Keep container tightly closed.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code29349990
UN Number3077
ADR Class9
Packing GroupIII
Storage Class11 - Combustible Solids
WGK (Germany)2