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| CAS No.: | 262-12-4 |
|---|---|
| Name: | DIBENZO-P-DIOXIN |
| Article Data: | 50 |
| Molecular Structure: | |
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| Formula: | C12H8 O2 |
| Molecular Weight: | 184.194 |
| Synonyms: | Dibenzo-p-dioxin(6CI,7CI,8CI); Dibenzo[1,4]dioxin; Diphenylene dioxide; Oxanthrene; Phenodioxin |
| EINECS: | 205-974-2 |
| Density: | 1.243g/cm3 |
| Melting Point: | 120 °C |
| Boiling Point: | 278.5°Cat760mmHg |
| Flash Point: | 115.7°C |
| Solubility: | Toxicity data ">
Stability
Toxicology
Toxicity data |
| Appearance: | white crystalline solid |
| Hazard Symbols: | Xn,N |
| Risk Codes: | 22-51/53 |
| Safety: | A poison by intraperitoneal route. Moderately toxic by ingestion. Questionable carcinogen with experimental tumorigenic data. When heated to decomposition it emits acrid smoke and irritating fumes. |
| PSA: | 18.46000 |
| LogP: | 3.58460 |
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- 852475-26-4MC1568
- 39227-54-8
2-chlorodibenzo-p-dioxin
- 262-12-4
dioxin
| Conditions | Yield |
|---|---|
| With acetophenone In methanol at 20℃; for 0.166667h; Irradiation; | 95.7% |
- 33857-26-0
2,7-dichloro-dibenzo[1,4]dioxine
- 262-12-4
dioxin
| Conditions | Yield |
|---|---|
| With sodium hydroxide; palladium on activated charcoal In isopropyl alcohol at 30℃; for 3h; | 94.4% |
| Multi-step reaction with 2 steps 1: 40.2 percent / acetophenone / methanol / 1 h / 20 °C / Irradiation 2: 95.7 percent / acetophenone / methanol / 0.17 h / 20 °C / Irradiation View Scheme | |
| Multi-step reaction with 2 steps 1: 40.2 percent / acetophenone / methanol / 1 h / 20 °C / Irradiation 2: 11.6 percent / methanol / 0.08 h / 20 °C / Irradiation View Scheme |
- 262-12-4
dioxin
| Conditions | Yield |
|---|---|
| at 200 - 250℃; under 1 Torr; for 1h; | 91% |
| Conditions | Yield |
|---|---|
| With potassium carbonate at 120℃; for 12h; Ullmann Condensation; | 90% |
| With pyridine; copper(I) phenylacetylenide 1.) reflux, 5 h, 2.) reflux, 5 h; Yield given. Multistep reaction; |
- 39227-53-7
1-chlorodibenzo-p-dioxin
- 262-12-4
dioxin
| Conditions | Yield |
|---|---|
| With acetophenone In methanol at 20℃; for 3h; Irradiation; | 87.4% |
- 262-12-4
dioxin
| Conditions | Yield |
|---|---|
| With zinc In acetonitrile for 0.166667h; Product distribution; | 86% |
| Conditions | Yield |
|---|---|
| With potassium tert-butylate; isopropyl alcohol In N,N-dimethyl-formamide at 20℃; for 48h; UV-irradiation; | 83% |
| With borane-ammonia complex In water; isopropyl alcohol at 50℃; for 5h; Sealed tube; | 92 %Chromat. |
- 29446-15-9
2,3-dichloro-dibenzo[1,4]dioxine
- 262-12-4
dioxin
| Conditions | Yield |
|---|---|
| With potassium tert-butylate; isopropyl alcohol In N,N-dimethyl-formamide at 20℃; for 48h; UV-irradiation; | 81% |
| Multi-step reaction with 2 steps 1: 55.9 percent / acetophenone / methanol / 3 h / 20 °C / Irradiation 2: 95.7 percent / acetophenone / methanol / 0.17 h / 20 °C / Irradiation View Scheme | |
| Multi-step reaction with 2 steps 1: 55.9 percent / acetophenone / methanol / 3 h / 20 °C / Irradiation 2: 11.6 percent / methanol / 0.08 h / 20 °C / Irradiation View Scheme | |
| Multi-step reaction with 2 steps 1: 24.3 percent / methanol / 0.17 h / 20 °C / Irradiation 2: 95.7 percent / acetophenone / methanol / 0.17 h / 20 °C / Irradiation View Scheme | |
| Multi-step reaction with 2 steps 1: 24.3 percent / methanol / 0.17 h / 20 °C / Irradiation 2: 11.6 percent / methanol / 0.08 h / 20 °C / Irradiation View Scheme |
- 40581-90-6
1,2,6,7-tetrachlorodioxine
- 262-12-4
dioxin
| Conditions | Yield |
|---|---|
| With sodium hydroxide; palladium on activated charcoal In isopropyl alcohol at 23℃; for 3h; | 74.1% |
- 139458-06-3
2-trimethylsilyldibenzo<1,4>dioxin
- 75-36-5
acetyl chloride
A
- 262-12-4
dioxin
B
- 22693-98-7
2-acetyldibenzo<1,4>dioxin
| Conditions | Yield |
|---|---|
| With aluminium trichloride for 1h; Heating; | A 56% B 36% |
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Chemistry
Molecular Structure:
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Molecular Formula: C12H8O2
Molecular Weight: 184.1907
IUPAC Name: Oxanthrene
Synonyms of Dibenzo-p-dioxin (CAS NO.262-12-4): AI3 08911 ; CCRIS 211 ; Dibenzo(1,4)dioxin ; Dibenzo(b,e)(1,4)dioxin ; Dibenzo-para-dioxin ; Dibenzodioxin ; Diphenylene dioxide ; EINECS 205-974-2 ; HSDB 4112 ; NCI-C03656 ; Oxanthrene ; Phenodioxin
CAS NO: 262-12-4
Classification Code: Mutation data ; Tumor data
Melting point: 120 °C
Index of Refraction: 1.625
Molar Refractivity: 52.39 cm3
Molar Volume: 148.1 cm3
Surface Tension: 51 dyne/cm
Density: 1.243 g/cm3
Flash Point: 115.7 °C
Enthalpy of Vaporization: 49.63 kJ/mol
Boiling Point: 278.5 °C at 760 mmHg
Vapour Pressure of Dibenzo-p-dioxin (CAS NO.262-12-4): 0.0072 mmHg at 25°C
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mouse | LD50 | oral | 866mg/kg (866mg/kg) | Chemosphere. Vol. 19, Pg. 989, 1989. | |
| rat | LD50 | intraperitoneal | 30mg/kg (30mg/kg) | Pharmaceutical Bulletin. Vol. 3, Pg. 337, 1955. | |
| rat | LD50 | oral | 1220mg/kg (1220mg/kg) | Chemosphere. Vol. 19, Pg. 989, 1989. |
Consensus Reports
IARC Cancer Review: Group 3 IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 (1987),p. 56.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Inadequate Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 15 (1977),p. 41.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human No Adequate Data IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 15 (1977),p. 41.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . NCI Carcinogenesis Bioassay Completed; Results Negative NCITR* National Cancer Institute Carcinogenesis Technical Report Series. (Bethesda, MD 20014) No. NCI-CG-TR-122 ,1979. .
Safety Profile
RIDADR of Dibenzo-p-dioxin (CAS NO.262-12-4): 3077
RTECS: HP3090000
HazardClass: 9
PackingGroup: I