31700-39-7

Basic information

• Product Name: pyren-4-ol
• Synonyms: 4-Pyrenol
• CAS NO: 31700-39-7
• Molecular Formula: C₁₆H₁₀O
• Molecular Weight: 218.25
• Mol File: 31700-39-7.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 437.4°C at 760 mmHg
• Flash Point: 213°C
• Density: 1.36g/cm³
• Vapor Pressure: 2.92E-08mmHg at 25°C
• Refractive Index: 1.895
• CAS DataBase Reference: pyren-4-ol(CAS DataBase Reference)
• NIST Chemistry Reference: pyren-4-ol(31700-39-7)
• EPA Substance Registry System: pyren-4-ol(31700-39-7)

Safety Data

• Hazardous Substances Data: 31700-39-7(Hazardous Substances Data)

Upstream product

• 57835-92-4 4-nitropyrene 

Downstream Products

• 17075-03-5 pyren-4-ylamine 

Relevant articles and documents

Phototransformations of environmental contaminants in models of the aerosol: 2 and 4-Nitropyrene

A comparative photochemical study of 2- and 4-nitropyrene (2- and 4-NO2Py) in different organic solvents was performed in order to provide information on the fate of these contaminants in models of the atmospheric aerosols. The isomers presented small photodegradation yields, 10?4–10?5 for 4-NO2Py and 10?5–10?6 for 2-NO2Py, demonstrating the low reactivity of the excited states and intermediate species that participate in their photodegradation. Photoproducts such as 4,5-pyrenedione, 4-hydroxypyrene, aminopyrene and pyrene were identified during the irradiation of 4-NO2Py. Substantial differences were observed in the photodegradation yields, and type and relative yields of the photoproducts of the 2-NO2Py and 4-NO2Py when compared to those of 1-NO2Py. These differences were related with the orientation of the nitro group and with differences in intersystem crossing rates which affect the yields of the pyrenoxy radical (PyO) and of the (π,π*) triplet state, principal precursors in their photodegradation. The smallest photodegradation yield was for 2-NO2Py due to the lack of interaction between the nitro group and the aromatic moiety thus resulting in a low yield of formation of the PyO radical. In the presence of O2, the photodegradation quantum yields of 4-NO2Py were reduced in all solvents due the quenching of the (π,π*) triplet state, and 4-aminopyrene was not observed thus demonstrating that its formation occurs from this state. These results suggest that in atmospheric aerosols containing an organic liquid-like layer, the nitropyrene isomers will show low photoreactivity resulting in an increase in their residence time in the atmosphere. An increase in reactivity is expected when the excited nitropyrenes are nearby substances with hydrogen donor capacities such as phenols. The photoproducts formed in the transformation could increase the toxicity of the particulate matter in the atmosphere.