| Identification | More | [Name]
Sodium diethyldithiocarbamate | [CAS]
148-18-5 | [Synonyms]
DIETHYLDITHIOCARBAMIC ACID SODIUM SALT
N,N-DIETHYLDITHIOCARBAMIC ACID, NA
SDEC
SODIUM DIETHYLDITHIOCARBAMATE
Carbamodithioicacid,diethyl,sodiumsalt
dedc
dedk
diethylcarbamodithioicacid,sodiumsalt
diethyl-carbamodithioicacisodiumsalt
diethyldithiocarbamatesodium
diethyldithiocarbamicacidsodium
diethyldithio-carbamicacisodiumsalt
diethylsodiumdithiocarbamate
dithiocarb
dithiocarbamate
ditiocarbsodium
imuthiol
kupral
n,n-diethyldithiocarbamicacid,sodiumsalt
na-ddtc | [EINECS(EC#)]
205-710-6 | [Molecular Formula]
C5H10NNaS2 | [MDL Number]
MFCD00041028 | [Molecular Weight]
171.26 | [MOL File]
148-18-5.mol |
| Chemical Properties | Back Directory | [Melting point ]
95°C | [density ]
1.1000 | [vapor pressure ]
0Pa at 20℃ | [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 | [color ]
Clear, colorless | [Specific Gravity]
1.08 | [Odor]
wh., sl. brown or sl. pink odorless cryst. | [Water Solubility ]
>=10 g/100 mL at 14 ºC | [Hydrolytic Sensitivity]
0: forms stable aqueous solutions | [LogP]
-1.1 at 20℃ | [CAS DataBase Reference]
148-18-5(CAS DataBase Reference) | [IARC]
3 (Vol. 12, Sup 7) 1987 | [EPA Substance Registry System]
148-18-5(EPA Substance) |
| Hazard Information | Back Directory | [General Description]
Odorless white or slightly brown or slightly pink crystals. | [Reactivity Profile]
SODIUM DIETHYLDITHIOCARBAMATE(148-18-5) 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 . | [Air & Water Reactions]
Water soluble. Thio and dithiocarbamates slowly decompose in aqueous solution to form carbon disulfide and methylamine or other amines. Such decompositions are accelerated by acids. | [Fire Hazard]
Flash point data for this chemical are not available; however, SODIUM DIETHYLDITHIOCARBAMATE is probably combustible. | [Chemical Properties]
White Solid | [Uses]
An inhibitor of superoxide dismutase, having both antioxidant and oxidant effects. | [Uses]
The -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. | [Definition]
ChEBI:Sodium diethyldithiocarbamate is an organic molecular entity. | [Preparation]
This salt is obtained by treating carbon disulfide with diethylamine in the presence of sodium hydroxide:
CS2+ HN(C2H5)2+ NaOH → NaS2CN(C2H5)2+ H2O | [Flammability and Explosibility]
Nonflammable | [storage]
Store at -20°C |
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