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Sodium diethyldithiocarbamate

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CAS:148-18-5
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Products Intro: Product Name:Sodium diethyldithiocarbamate
CAS:148-18-5

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Sodium diethyldithiocarbamate Basic information
Product Name:Sodium diethyldithiocarbamate
Synonyms:dithiocarbamate;ditiocarbsodium;imuthiol;kupral;n,n-diethyldithiocarbamicacid,sodiumsalt;na-ddtc;ncico2835;sodiumdedt
CAS:148-18-5
MF:C5H10NNaS2
MW:171.26
EINECS:205-710-6
Product Categories:Amines;Sulfur & Selenium Compounds;Pharmaceutical Intermediates;Aliphatics
Mol File:148-18-5.mol
Sodium diethyldithiocarbamate Structure
Sodium diethyldithiocarbamate Chemical Properties
Melting point 95°C
density 1.1000
storage temp. Keep in dark place,Inert atmosphere,Room temperature
solubility about 35 % in water, less soluble in organic solvents. However, the free acid, diethyldithiocarbamic acid, is readily soluble in organic solvents and less soluble in water. Thus, on acidification of an aqueous solution of a diethyldithiocarbamate, the free acid can be extracted with chloroform or carbon tetrachloride. The distribution ratio is 2,360 for chloroform and 343 for carbon tetrachloride.
form Liquid
Specific Gravity1.08
color Clear, colorless
Water Solubility >=10 g/100 mL at 14 ºC
Hydrolytic Sensitivity0: forms stable aqueous solutions
CAS DataBase Reference148-18-5(CAS DataBase Reference)
IARC3 (Vol. 12, Sup 7) 1987
EPA Substance Registry SystemSodium diethyldithiocarbamate (148-18-5)
Safety Information
RIDADR 3077
HazardClass 9
PackingGroup III
Hazardous Substances Data148-18-5(Hazardous Substances Data)
MSDS Information
ProviderLanguage
Sodium diethyldithiocarbamate English
Sodium diethyldithiocarbamate Usage And Synthesis
Chemical PropertiesWhite Solid
UsesAn inhibitor of superoxide dismutase, having both antioxidant and oxidant effects.
UsesThe -log KH of the acid is 3.4 in aqueous medium. From this fact and the distribution ratio it follows that the reagent can be extracted quantitatively from acidic media (pH < 4) with organic solvents, while at pH > 8 it remains quantitatively in the aqueous phase.
Sodium diethyldithiocarbamate reacts with even more metal ions than does dithizone. However, its analytical application is seriously limited by its considerably lower stability in acidic aqueous media. According to the examinations of Bode,the reagent undergoes considerable decomposition within 5 minutes at pH 5. The analytical application of the reagent is therefore restricted to a very narrow pH range. There is no chance with this reagent to enhance the analytical selectivity of extractions by making use of the difference between the stabilities of its complexes with various metal ions and to choose the pH of the reaction mixture accordingly. Notwithstanding, some authors suggest extraction procedures from acidic media, for instance in the cases of such stable complexes as those of copper( II), nickel(II) and bismuth(III). However, in these procedures extraction must be done immediately after acidification of the solution, and even then the error caused by decomposition of the reagent must be taken into account. The analytical selectivity of the complexation reactions of diethyldithiocarbamate can be enhanced by using various auxiliary complexing and masking agents. EDTA is particularly useful for this purpose, but there are also other complexing agents, such as cyanide or citrate.
The reagent does not absorb in the visible region (>400 nm). On the other hand, its metal complexes are generally coloured, which makes possible the application of the reagent for spectrophotometric measurements. For instance, its cobalt complex is green (absorption maximum at 650 nm), the copper complex brown (absorption maximum at 440 nm), the iron(III) complex red (515 nm), etc. It can be seen that diethyldithiocarbamate compares favourably with dithizone and oxine, as one of the most useful extracting and spectrophotometric agents in analytical chemistry. In the following some analytical procedures using diethyldithiocarbamate are described.Besides being well proved in practice, the procedures presented may also serve as illustrations of how to develop other solvent extraction analytical procedures.
Diethyldithiocarbamate has also proved suitable for the enrichment and isolation of traces of metals. For instance, the metal content of brine or the washings obtained in the purification of contaminated air can be extracted with a solution of diethyldithiocarbamate in ethyl propionate. The ethyl propionate solution can be used directly for atomic absorption spectroscopic measurement. The sensitivity of the measurement is much higher in this medium than in water.
General DescriptionOdorless white or slightly brown or slightly pink crystals.
Air & Water ReactionsWater soluble. Thio and dithiocarbamates slowly decompose in aqueous solution to form carbon disulfide and methylamine or other amines. Such decompositions are accelerated by acids.
Reactivity ProfileSodium diethyldithiocarbamate is not compatible with strong oxidizing agents. Aqueous solutions slowly decompose to form carbon disulfide and an amine. Such decompositions are accelerated by acids. Addition of acid to the aqueous solution produces a white turbidity .
Fire HazardFlash point data for Sodium diethyldithiocarbamate are not available; however, Sodium diethyldithiocarbamate is probably combustible.
Safety ProfileModerately toxic by ingestion, intraperitoneal, and subcutaneous routes. Experimental reproductive effects. Questionable carcinogen with experimental neoplastigenic and teratogenic data. Human mutation data reported. When heated to decomposition it emits very toxic fumes of NOx, SOx, and Na2O. Used as a pesticide. See also CARBAMATES
Sodium diethyldithiocarbamate Preparation Products And Raw materials
Raw materialsClorofene-->Disulfiram-->Butyldiglycol
Preparation ProductsAcetonitrile-->ORNOPROSTIL-->noncyanide zinc plating additive-TDAE-->DIETHYL DITHIOBIS(THIONOFORMATE)-->methyl diethyldithiocarbamate-->Sodium ethylxanthogenate
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