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| CAS No.: | 32536-52-0 |
|---|---|
| Name: | OCTABROMODIPHENYL ETHER |
| Molecular Structure: | |
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|
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| Formula: | C12H2 Br8 O |
| Molecular Weight: | 801.42 |
| Synonyms: | Phenylether, octabromo deriv. (8CI); Bromkal 79-8DE; CD 79; DE 79; EB 8; FR 1208; FR143; Octabromobiphenyl ether; Octabromodiphenyl ether; Octabromodiphenyl oxide;Tardex 80 |
| Density: | 2.768g/cm3 |
| Melting Point: | 200oC (range, 167-257oC) |
| Boiling Point: | 523.5°Cat760mmHg |
| Flash Point: | 219.7°C |
| Hazard Symbols: | Moderately toxic by inhalation and skin contact. Low toxicity by ingestion. |
| Risk Codes: | 61-62 |
| Safety: | Moderately toxic by inhalation and skin contact. Low toxicity by ingestion. When heated to decomposition it emits toxic vapors of Br−. |
| PSA: | 9.23000 |
| LogP: | 9.57890 |
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Chemistry
Chemistry informtion about Octabromodiphenyl Ether (CAS NO.32536-52-0) is:
IUPAC Name: 1,2,3,4,5-Pentabromo-6-(2,4,5-Tribromophenoxy)Benzene
Synonyms: 1,1'-Oxybisbenzeneoctabromoderiv. ; 1,1'-Oxybis-Benzenoctabromoderiv. ; Benzene,1,1'-Oxybis-,Octabromoderiv. ; Bromkal79-8de ; Cd79 ; De79 ; Eb8 ; Fr1208
Product Categories: Organics
MF: C12H2Br8O
MW: 801.38
EINECS: 251-087-9
Density: 2.768 g/cm3
Flash Point: 219.7 °C
Boiling Point: 523.5 °C at 760 mmHg
Vapour Pressure: 1.57E-10 mmHg at 25°C
Enthalpy of Vaporization: 76.71 kJ/mol
Following is the molecular structure of Octabromodiphenyl Ether (CAS NO.32536-52-0) is:
Uses
Octabromodiphenyl Ether (CAS NO.32536-52-0) is used in conjunction with antimony trioxide as a flame retardant in the housings of electrical and electronic equipment, mainly in the plastic acrylonitrile butadiene styrene, but also in high impact polystyrene, polybutylene terephthalate and polyamides. Typically 12–15% of the weight of the final product will consist of octaBDE.
Production
Commercial Octabromodiphenyl Ether (also known as "Octabrom") is a technical mixture of different PBDE congeners having an average of 7.2 to 7.7 bromine atoms per molecule of diphenyl ether.[1] The predominant congeners in commercial octaBDE are those of heptabromodiphenyl ether and octaBDE. The term octaBDE alone refers to isomers of octabromodiphenyl ether (PBDE congener numbers 194–205); the Infobox displays BDE-203 (2,2’,3,4,4’,5,5’,6-octabromodiphenyl ether).
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| rabbit | LD | skin | > 2gm/kg (2000mg/kg) | National Technical Information Service. Vol. OTS0522296, | |
| rat | LC | inhalation | > 60gm/m3/1H (60000mg/m3) | behavioral: somnolence (general depressed activity) lungs, thorax, or respiration: respiratory stimulation skin and appendages (skin): "dermatitis, other: after systemic exposure" | National Technical Information Service. Vol. OTS0522296, |
| rat | LD | oral | > 5gm/kg (5000mg/kg) | National Technical Information Service. Vol. OTS0522296, |
Safety Profile
Safty information about Octabromodiphenyl Ether (CAS NO.32536-52-0) is:
Moderately toxic by inhalation and skin contact. Low toxicity by ingestion. When heated to decomposition it emits toxic vapors of Br−.
Hazard Codes:
Xi
T
Risk Statements:
R61:May cause harm to the unborn child.
R62:Risk of impaired fertility.
Safety Statements:
S53:Avoid exposure - obtain special instructions before use.
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR: 3152
HazardClass: 9
PackingGroup: II
Specification
Octabromodiphenyl Ether (CAS NO.32536-52-0) is released by different processes into the environment, such as emissions from the manufacture of octaBDE-containing products and from the products themselves. Elevated concentrations can be found in air, water, soil, food, sediment, sludge, and dust. In the environment, "photolysis, anaerobic degradation and metabolism in biota" can cause debromination of octaBDE, which produces PBDEs with fewer bromine atoms "which may have higher toxicity and bioaccumulation potential." It may enter the body by ingestion or inhalation. It is "stored mainly in body fat" and may stay in the body for years. In an investigation carried out by the WWF, "the brominated flame retardant chemical (PBDE 153), which is a component of the penta- and octa- brominated diphenyl ether flame retardant products" was found in all blood samples of 14 ministers of health and environment of 13 European Union countries.The chemical has no proven health effects in humans; however, based on animal experiments, octaBDE may have effects on "the liver, thyroid, and neurobehavioral development."