79-27-6 Hazards Identification
Pictogram(s):
Signal:
Danger
GHS Hazard Statements:
H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
H330: Fatal if inhaled [Danger Acute toxicity, inhalation]
H412: Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]
Precautionary Statement Codes:
P260, P264+P265, P271, P273, P280, P284, P304+P340, P305+P351+P338, P316, P320, P337+P317, P403+P233, P405, and P501
Hazard Classes and Categories:
Acute Tox. 2 *
Eye Irrit. 2
Aquatic Chronic 3
Acute Tox. 4 (74.51%)
Skin Irrit. 2 (74.51%)
Eye Irrit. 2 (100%)
Acute Tox. 2 (100%)
Aquatic Chronic 3 (100%)
Acute toxicity - category 2
Eye irritation - category 2
Hazardous to the aquatic environment (chronic) - category 3
Acute toxicity (Oral) - Category 4
Acute toxicity (Inhalation: Vapours) - Category 1
Skin corrosion/irritation - Category 2
Serious eye damage/eye irritation - Category 2B
Specific target organ toxicity - Single exposure - Category 2 (central nervous system),
Category 3 (respiratory tract irritation)
Specific target organ toxicity - Repeated exposure - Category 1 (liver),
Category 2 (thyroid, lung)
Serious eye damage/eye irritation - Category 2A-2B
Specific target organ toxicity - Repeated exposure - Category 1 (liver, lung),
Category 2 (thyroid)
Acute toxicity (Inhalation: Dusts and mists) - Category 3
Serious eye damage/eye irritation - Category 2
Specific target organ toxicity - Single exposure - Category 1 (central nervous system),
Category 3 (respiratory tract irritation)
Specific target organ toxicity - Repeated exposure - Category 1 (respiratory organs),
Category 2 (liver)
Reactive - 1st degree
Hazards Summary:
Some animals exposed at 4 ppm for 180 days show mild lung and liver injury. At an average exposure of 14 ppm for 100 to 106 days, tetrabromoethane produced some degree of pulmonary edema and slight fatty degeneration of the liver. One nearly fatal human case with prominent liver injury was reported. The exposure was estimated at 16 ppm for 10 minutes. Other chemicals may have been involved. Findings in another human case were that of solvent-induced encephalopathy. Direct skin contact can cause second degree burns. [ACGIH] A skin, eye, and respiratory tract irritant; Inhalation of high concentrations may cause CNS effects and liver damage; [ICSC]
79-27-6 Usage
Uses
Used in Chemical Industry:
1,1,2,2-Tetrabromoethane was traditionally used as a solvent for various chemical processes due to its unique properties. Its ability to dissolve a wide range of substances made it a valuable component in the industry.
Used in Flame Retardant Production:
1,1,2,2-Tetrabromoethane was employed as a flame retardant to reduce the flammability of materials. Its chemical structure allowed it to slow down the combustion process, making it useful in the production of fire-resistant products.
Used in Gasoline Additive Production:
In the past, 1,1,2,2-Tetrabromoethane was utilized in the production of gasoline additives to improve the fuel's performance and efficiency. Its properties contributed to enhancing the combustion process within engines.
However, due to the environmental and health concerns associated with 1,1,2,2-Tetrabromoethane, its use has been significantly reduced or phased out in many applications. It is crucial to handle and dispose of this chemical with extreme caution to minimize potential harm to human health and the environment.
Check Digit Verification of cas no
The CAS Registry Mumber 79-27-6 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 7 and 9 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 79-27:
(4*7)+(3*9)+(2*2)+(1*7)=66
66 % 10 = 6
So 79-27-6 is a valid CAS Registry Number.
InChI:InChI=1/C2H2Br4/c3-1(4)2(5)6/h1-2H
79-27-6Relevant academic research and scientific papers
Winter, Rolf Walter,Gard, Gary L.
, p. 1041 - 1043 (2008)
SF5Br reacts with 1,2-haloethylenes (F, Cl, Br) in distinct ways. In the case of F- and Cl-olefins, the expected addition occurs while with 1,2-dibromoethylene a metathetical reaction yielding in a clean reaction a 1:1 mixture of SF5CH{double bond, long}CHBr and CHBr2CHBr2 is found. The mechanism for this reaction is discussed.
Functionalization of saturated hydrocarbons by aprotic superacids 4. Ionic bromination of ethane and other alkanes and cycloalkanes with molecular bromine in the presence of systems based on polyhalomethanes and AlBr3 under mild conditions
Akhrem,Orlinkov,Afanas'eva,Vol'pin
, p. 1148 - 1153 (2007/10/03)
Aprotic organic superacids CBr4 · 2AlBr3, CBr4 · AlBr3, · CCl4 · 2AlBr3, CCl4 · 2AlBr3, and C6F5CF3 · 2AlBr3 efficiently catalyze the bromination of alkanes and cycloalkanes with Br2. Ethane is selectively brominated at 55-65 °C to give mostly 1,2-dibromoethane (stoichiometric reaction). Propane, butane, cyclopentane, cyclohexane, and methyl-cyclopentane react with Br2 at -40 to -20 °C with good selectivity affording monobromides in high yields (catalytic reactions).
Laser Pulse Photolysis of 7-Silanorbornadiene in Solution: Experimental and AM1 Studies of Complexation between Silylenes and CHBr3
Taraban, Marc B.,Plyusnin, Victor F.,Volkova, Olga S.,Grivin, Vyacheslav P.,Leshina, Tatyana V.,et al.
, p. 14719 - 14725 (2007/10/02)
The quantum yield (0.95 +/- 0.1) for the decomposition of 7,7-dimethyl-1,4,5,6-tetraphenyl-2,3-benzo-7-silanorbornadiene (Ib) in hexane at room temperature has been determined by the laser pulse photolysis technique.Reaction rate constants of the generated dimethylsilylene with bromoform (4.4 * 107 M-1 s-1) and Ib (5.7 * 109 M-1 s-1) have been measured.It is suggested that the reaction of Me2Si: with CHBr3 occurs via the formation of an intermediate complex (λmax = 338 nm, ε =1280 M-1 cm-1).The bimolecular rate constant for decay of the complex (2k = 1.61 * 109 M-1 s-1) has also been estimated.Semi-empirical PM3 calculations of the model reaction between the singlet SiH2 and CHBr3 show the formation at the first step of the reaction of a donor-acceptor complex stabilized by interactions between a vacant p-AO of SiH2 and a lone pair of one of the Br atoms.Such a complex should be rather stable both toward dissociation into the starting reagents (E = 23.3 kcal/mol) and further rearrangement into the insertion product, Br(H2)SiCHBr2 (E = 22.3 kcal/mol).
T+:Very toxic;
