| Compound Name |
Dibenzofuran |
| Stockholm Annex code | III, IV |
| Key |
Annex I to the regulation are subject to prohibition (with specific exemptions) on manufacturing, placing on the market and use; Annex II to the regulation are subject to restriction on manufacturing, placing on the market and use; Annex III to the regulation are subject to release reduction provisions; and Annex IV to the regulation are subject to waste management provisions. Note that for some substances listed in Annex I, specific exemptions on the prohibition of their use, manufacturing and placing on the market may apply. |
| Classification |
Intentional |
| Category |
Listed under Annex C |
| Year of Listing Decision |
2001 |
| Persistence |
N/A |
| Specific exemptions associated with its use |
Production: None |
| Acceptable purposes associated with its use |
It was used as a herbicide |
| Conventions on POPs |
Stockholm Convention Convention on Long-Range Transboundary Air Pollution Rotterdam Convention Basel Convention |
| Name |
Dibenzofuran |
| Synonyms |
Dibenzofuran, 2,2'-Biphenylene oxide 2,2'-Biphenylylene oxide 8-oxatricyclo[7.4.0.0^{2,7}]trideca-1(9),2(7),3,5,10,12-hexaene Dibenzo[b]furan Dibenzofuran, 98% Dibenzol(b,d)furan 2,2'-Biphenylylene oxide |
| Structure | C3=CC=CC=C3O2.png)
Molecular Formula:
C12H8O
|
| CAS Number | 132-64-9 |
| European Community (EC) Number | 217-122-7 |
| European Chemicals Agency (ECHA) | 205-071-3 |
| PubChem ID | 568 |
| DSSTOX Substance ID | DTXSID2021993 |
| KEGG | N/A |
| ChemSpider |
30383 36507 38427 48014 459899 458876 49937 |
| Similarity threshold | Name of Related Compound | DSSTox Substance ID | CAS Number | Molecular weight | Molecular formula |
|---|---|---|---|---|---|
| 1 | 2,3-Benzofuran | DTXSID6020141 | 271-89-6 | 118 g/mol | C8H6O |
| 1 | 1,4-Epoxynaphthalene | DTXSID90618754 | 236-81-7 | 142 g/mol | C10H6O |
| 1 | Benzo[1,2-b:4,3-b']difuran | DTXSID00344037 | 210-79-7 | 158 g/mol | C10H6O2 |
| 1 | Benzo[1,2-b:4,5-b']difuran | DTXSID40720255 | 267-58-3 | 158 g/mol | C10H6O2 |
| 1 | Benzo[1,2-b:3,4-c']difuran | DTXSID20723820 | 210-75-3 | 158 g/mol | C10H6O2 |
| 1 | Benzo[1,2-b:4,5-c']difuran | DTXSID30723896 | 267-36-7 | 158 g/mol | C10H6O2 |
| 1 | Naphtho(2,1-b)furan | DTXSID30177779 | 232-95-1 | 168 g/mol | C12H8O |
| 1 | Naphtho[1,2-b]furan | DTXSID50946060 | 234-03-7 | 168 g/mol | C12H8O |
| 1 | 4,10-Epoxyphenanthrene | DTXSID00823276 | 7127-54-0 | 192 g/mol | C14H8O |
| 1 | Naphtho(2,1-b:7,6-b')difuran | DTXSID40193344 | 4035-79-4 | 208 g/mol | C14H8O2 |
| Description | Reference | Article Link |
|---|---|---|
| Chlorinated dibenzofurans, or CDFs, are a family of chemicals that contain one to eight chlorine atoms attached to the carbon atoms of the parent chemical, dibenzofuran. There are 135 different types of CDFs with varying harmful health and environmental effects. The compounds that contain chlorine atoms at the 2,3,7,8-positions of the dibenzofuran molecule are known to be especially harmful. Not all of the different types have been found in large enough quantities to study the physical properties. However, of those that have been studied, they do not dissolve in water easily and appear to be in the form of colorless solids. There is no known use for these chemicals. Other than for research purposes, they are not deliberately produced by industry. Most CDFs are produced in small amounts as undesirable by-products of certain processes, such as manufacturing other chemicals or bleaching at paper and pulp mills. CDFs can also be released from incinerators. | Agency for Toxic Substances and Disease Registry. 1994. Toxicological Profile for chlorodibenzofurans (CDFs). Accessed on 14 October 2020 | Link |
| Dibenzofuran is a heterocyclic organic compound with the chemical structure shown at right. It is an aromatic compound that has two benzene rings fused to a central furan ring. All the numbered carbon atoms have a hydrogen atom bonded to each of them. It is a volatile white solid that is soluble in nonpolar organic solvents. It is obtained from coal tar, where it exists as a 1% component. | Wikipedia: Dibenzofurans. Accessed on 14 October 2020 | Link |
| PCDDs and PCDFs are generally classified as toxic and carcinogenic unintentional by-products that are present in small amounts in the environment. The major issue with PCDDs/Fs is their extreme persistency in the environment, which is toxic to living organisms and can potentially cause cancer. There are three main categories for dioxins and furans: polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and dioxin-like polychlorinated biphenyls (DL-PCBs). PCDDs and PCDFs are released as byproducts of anthropogenic activities, or processes such as forest fires. They are byproducts of the synthesis or combustion of chlorine based compounds that include some of the most toxic chemical substrates. This group of compounds include 210 possible congeners and at least seventeen have been identify as toxic with wide ranging toxicity from which 2,3,7,8- tetrachlorodibenzo-p-dioxin (TCDD), was identified as the most toxic compound. | Kanan and Samara. 2018. Dioxins and furans: A review from chemical and environmental perspectives | Link |
| Polychlorinated dibenzo-p-dioxins and -furans. PCDD/Fs are two groups of persistent, semivolatile and toxicologically significant trace organic contaminants. They enter the environment in ultra-trace amounts from various combustion sources and as chemical impurities in a range of manufactured organochlorine products. The presence of PCDD/Fs in the atmosphere and the processes they undergo there are of particular interest to environmental organic chemists at the present time. | Lohmann and Jones. 1998. Dioxins and furans in air and deposition: A review of levels, behaviour and processes | Link |