The commercial mixture, named pentabromodiphenyl ether contains the pentabromo derivative predominantly (50–62%) however, the mixture also contains tetrabromides (24–38%) and hexabromides (4–8%), as well as traces of the tribromides (0–1%). These species have average 5 or more bromine atoms per molecule. Studies have linked them to reproductive and neurological risks at certain concentrations or higher. Lower-brominated PBDEs have been known to affect hormone levels in the thyroid gland. These species average 1–4 bromine atoms per molecule and are regarded as more dangerous because they more efficiently bioaccumulate. The available commercial PBDE products are not single compounds or even single congeners but rather mixtures of congeners. In the United States, PBDEs are marketed with the trade names DE-60F, DE-61, DE-62, and DE-71 applied to pentaBDE mixtures, DE-79 applied to octaBDE mixtures, and DE 83R and Saytex 102E applied to decaBDE mixtures. The number of isomers for mono-, di-, tri-, tetra-, penta-, hexa-, hepta-, octa-, nona-, and decabromodiphenyl ethers are 3, 12, 24, 42, 46, 42, 24, 12, 3 and 1, respectively. The family of PBDEs consists of 209 possible substances, which are called congeners (PBDE = C 12H (10− x)Br xO ( x = 1, 2. Because of their toxicity and persistence, the industrial production of some PBDEs is restricted under the Stockholm Convention, a treaty to control and phase out major persistent organic pollutants (POPs). The health hazards of these chemicals have attracted increasing scrutiny, and they have been shown to reduce fertility in humans at levels found in households. Translations in context of penta, hexa, hepta in English-French from Reverso Context: As far as I understand Canada has banned the manufacture of tetra. PBDEs are classified according to the average number of bromine atoms in the molecule. They are structurally akin to polychlorinated diphenyl ethers (PCDEs), polychlorinated biphenyls (PCBs) and other polyhalogenated compounds, consisting of two halogenated aromatic rings. Like other brominated flame retardants, PBDEs have been used in a wide array of products, including building materials, electronics, furnishings, motor vehicles, airplanes, plastics, polyurethane foams, and textiles. Polybrominated diphenyl ethers or PBDEs, are a class of organobromine compounds that are used as flame retardants. These half-lives of PCDDs are critically compared with measured t 1/2 values of PCDDs and other persistent organic pollutants in rats, monkeys and humans.For the Protein DataBank in Europe (PDBe), see Protein Data Bank. Furthermore, the terminal t 1/2 values of PCDDs in adult humans were calculated from the regression equation: log t 1/2H=1.34 log t 1/2R+1.25 which was recently established for 50 xenobiotics ( t 1/2H=terminal half-lives in days for humans, t 1/2R=terminal half-lives in days for rats). This factor was used to calculate the t 1/2 values of the other polychlorinated dibenzo- p-dioxins (PCDDs) in humans from the rat data. The t 1/2 of TCDD in humans is about 150 times that of rats. The average half-life of TCDD in adult humans is approximately 2840 days, while in Sprague–Dawley rats the average t 1/2 of TCDD is 19 days. Furthermore, there are some published half-lives of TCDD in adult humans. Aarex Tiaokhiao calls this number doocol, 10-noogol, uoonolplex, bigiol, or. Using Alistair Cockburns fz- prefix, it can be named 'fzten'. The term was coined by Sbiis Saibian, and its name is a homonym with an English word meaning a conversation between two people. The elimination half-lives ( t 1/2) in Sprague–Dawley rats for 2,3,7,8-tetrachlorodibenzo- p-dioxin (TCDD), 1,2,3,7,8-pentachlorodibenzo- p-dioxin (PeCDD), 1,2,3,4,7,8-hexachlorodibenzo- p-dioxin (HxCDD), 1,2,3,4,6,7,8-heptachlorodibenzo- p-dioxin (HpCDD) and 1,2,3,4,6,7,8,9-octachlorodibenzo- p-dioxin (OCDD) were estimated in long-term studies by Schlatter, Poiger and others. A dialogue is equal to 210 1010 10,000,000,000, ten billion, or tenplex.