Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Sodium dimethyl dithiocarbamate

Sodium dimethyl dithiocarbamate/ disodium ethylene-bis-dithiocarbamate Moderate effectiveness in 3-8 hours against most bacteria 200 ppm of a 15% solution used weekly Stable under temperature and pH fluctuations reacts with dissolved iron to form a precipitate... [Pg.148]

There are two treatability groups of dissolved metals for chemical precipitation, complexed and non-complexed metals. Non-complexed metals can be removed by a direct precipitation with such a chemical as lime (Ca(OH) ), caustic (NaOH), sodium sulfide (Na2S), ferrous sulfide (FeS), or sodium carbonate (NajCOj). Complexed metals require coprecipitation with ferrous sulfate (FeS04), ferrous chloride (FeClj), or sodium dimethyl dithiocarbamate (DTC) in addition to a regular precipitant such as caustic or lime. Electrochemically generated ferrous ion is also effective in removing a wide variety of heavy metals, including hexavalent chromium. [Pg.193]

These are easily prepared by the reaction of amines with carbon disulfide (1) in the presence of alkali (Scheme 17).2 The synthesis of dithiocarba mates (4) was first reported by Debus in 1850. Dithiocarba mates (4) form metal chelates, and sodium dimethyl dithiocarbamate is used in quantitative inorganic analysis for the estimation of metals, e.g. copper and zinc. Dithiocarba mates are also employed as vulcanisation accelerators and antioxidants in the rubber industry, and as agricultural fungicides.3 The parent dithiocarbamic acids are unstable, decomposing to thiocyanic acid and hydrogen sulfide however, the salts and esters are stable compounds. Dithiocarba mates (4) are oxidised by mild oxidants to the thiuram disulfides (38) (Scheme 17). [Pg.156]

Thiostat B. [Uniroyal] Sodium dimethyl dithiocarbamate bactericide, fungicide fix industrial use slimicide for paper ml]g. [Pg.375]

Perkacit, Sodium dimethyl dithiocarbamate, Akzo Nobel Chemicals Inc. [Pg.925]

Vulcanex, Vulcanized fiber, Oliner Eibre Co., Inc. Vulcastop, Sodium dimethyl dithiocarbamate, Akzo Nobel Chemicals Inc. [Pg.945]

Of minor importance as microbicides for the treatment of cooling waters are dithiocarbamates such as sodium dimethyl dithiocarbamate (III.9.10.1) and potassium A -methyl dithiocarbamate (III.9.9). They function best in environments of pH 7 and higher. [Pg.452]

About ten years ago, all ESBR plants modified their processes to eliminate die presence of volatile nitrosamines. These potentially carcinogenic chemicals were present at concentrations in parts per billion. The changes made eliminated the use of sodiiun nitrite and one component of the short stop system, sodium dimethyl dithiocarbamate. [Pg.123]

The l,3-dithiolo[4,5-6]pyridin-2-one (549) has been prepared in a two-step procedure (Scheme 69) (81JHC1581). Treatment of 2-chloro-3,5-dinitropyridine (547) with sodium dimethyldithiocarbamate in anhydrous acetone at 25 °C overnight afforded 3,5-dinitropyridyl-2-dimethyl-dithiocarbamate (548) (82%) as a stable crystalline solid. Heating (548) at reflux in acetone afforded a mixture of compounds from which 6-nitro-l, 3-dithiolo[4,5-h]pyridin-2-one (549) (7%), 2-dimethyl-... [Pg.336]

A study in Japan looked at the migration of dimethylamine (DMA) into water and hydrochloric acid from 25 rubber articles (including stoppers, chopping boards, spatulas and teats). After one hour of refluxing, the water extracts contained 3 to 1280 mg of DMA per kg of rubber. The study also showed that the thiuram accelerators that were present (TMTD and TMTM) were almost totally decomposed to DMA (a nitrosatable substance). However, in the case of dimethyl dithiocarbamate salts (sodium, zinc, copper and lead examples were included), the decomposition to DMA depended on the solvent used and the salt compound. [Pg.292]

Thiostop [Uniroyal]. TM for aqueous solutions of the sodium and potassium salts of dimethyl dithiocarbamate. [Pg.1238]

Chlorodiphenylbismuthine (10 mmol) was treated with sodium dimethyldithiocarbamate dihydrate (10 mmol) in chloroform (50 ml) for 1 h at 25°C to give phenylbismuth bis(dimethyl-dithiocarbamate) in 84% yield the other product was triphenylbismuthine (64%) [68JOM( 11)627]. [Pg.122]

Mercaptans — Sulpho compounds — Sodium isethionate — Methyl-sulphuric acid—Potassium-trichlorrmethyl sulphate — Potassium-trichlor-methyl sulphonate — Ethyl-sulphuric acid—Potassium-isoamyl sulphate—Potassium xanthate—Dimethyl-dithiocarbamic acid.47 49... [Pg.15]

Sodium N,N-dimethyl dithiocarbamate. See Sodium dimethyidithiocarbamate Sodium 3,8-dimethyl-5-(1-methylethyl)-1-azulenesulfonate. See Sodium guiazulene sulfonate... [Pg.4017]

Other sulfur compounds such as thiourea, ammonium dithiocarbamate, or hydrogen sulfide also lead to 2-mercaptothiazoles. Thus thiourea has been used in the syntheses of 4,5-dimethyl (369) and 4-aryl-2-mercapto-thiazoles (Table 11-30) (519). The reactions were carried out by condensing the ia -thiocyanatoketones with thiourea in alcohol and water acidified with hydrochloric acid. By this procedure, 4-aryl-2-mercaptothiazoles were obtained in yields of 40 to 80% with bis-(4-aryl-2-thiazolyl) sulfides as by-products (519). These latter products (194) have also been observed as a result of the action of thiourea on 2-chloro-4-arylthiazole under the same experimental conditions. They can be separated from 2-mercaptothiazoles because of their different degrees of solubility in sodium hydroxide solution at 5%. In this medium bis-(4-phenyl-2-thiazolyl)sulfide is... [Pg.276]

When solutions of tellurium bis[diethyldithiocarbamate] and sodium dimethyldithiocarbamate or sodium pentamethylenedithiocarbamate in methanol are mixed, the less soluble dimethyl or pentamethylene derivative precipitates. To drive the reaction to completion an excess of the sodium dithiocarbamate is required3-4. [Pg.49]

Sodium NN-dimethyl Ammonium dithiocarbamate tetramethylene-dithiocarbamate... [Pg.125]

Sodium N, Ammonium N-dimethyl tetramethylene dithio- dithiocarbamate carbamate... [Pg.125]

Reaction of sodium dithiocarbamate with an equimolar amount of the chloroacetaldehyde/sodium hydrogen sulfite adduct (110) in dimethyl-formamide at room temperature yields 111 quantitatively. The latter, treated first with concentrated sulfuric acid and then with sodium tetraphenylborate, gives the salt 112 in 86% yield.Under the same conditions, piperi-dinium dithiobenzoate reacts with 110 providing in 64% yield 2-phenyl-l,3-dithiolium tetraphenylborate. ... [Pg.205]

N-Cyclohexyl-2-benzothiazolesulfenamide 1,3-Dibutylthiourea Dicyclohexylbenzothiazyl-2-sulfenamide Dimethyl diphenyl thiuram disulfide 2,6-Dimethylmorpholine Diphenylamine 4,4 -Dithiodimorpholine 2-Ethylbutyraldehyde Ethyl morpholine Formaldehyde aniline 2,6-Lutidine N-Nitrosodimethylamine Paraldehyde p-Quinone dioxime Selenium Selenium dimethyidithiocarbamate Sodium diethyidithiocarbamate Sodium dimethyidithiocarbamate Sodium nitrite N,N,N, N -Tetrabenzylthiuram disulfide Tetraisobutylthiuram disulfide Tetramethylthiuram disulfide Thiocarbamyl sulfenamide Thiophenol Thiourea Triethanolamine Triethylamine Triethylenetetramine n-Valeraldehyde Zinc dialkyl dithiophosphate Zinc diamyidithiocarbamate Zinc dibenzyl dithiocarbamate Zinc diisobutyidithiocarbamate Zinc isopropyl xanthate Zinc 2-mercaptobenzothiazole Zinc oxide Zinc-N-pentamethylene dithiocarbamate Zinc peroxide accelerator, rubber articles for repeated use food-contact... [Pg.4785]

Okawara and coworkers (Ref. 10) first attempted to use phase transfer catalysis to modify a finely dispersed poly(vinyl chloride) powder in aqueous medium using nucleophiles such as azide, dithiocarbamate, or thiophenoxide ions in the presence of tetrabutyl ammonium salts. While a maximum conversion of 10% was obtained with the first two nucleophiles, thiophenoxide afforded a 30% conversion. Although the authors indicate that the reaction took place only at the surface of the polymer particles, the fairly high conversion obtained with thiophenoxide might suggest otherwise. A second report from the same laboratory (Ref. 11) focuses on reactions of poly(vinyl chloride) solutions with sodium azide in the presence of various catalysts. As expected, the reaction is strongly catalyzed by cationic surfactants such as dimethyl distearyl ammonium chloride or tetrabutyl ammonium chloride which both afford essentially complete conversion to the azido polymer. In contrast, tetrabutyl ammonium iodide is totally ineffective. [Pg.17]


See other pages where Sodium dimethyl dithiocarbamate is mentioned: [Pg.56]    [Pg.58]    [Pg.81]    [Pg.857]    [Pg.337]    [Pg.23]    [Pg.23]    [Pg.562]    [Pg.246]    [Pg.6]    [Pg.56]    [Pg.58]    [Pg.81]    [Pg.857]    [Pg.337]    [Pg.23]    [Pg.23]    [Pg.562]    [Pg.246]    [Pg.6]    [Pg.182]    [Pg.141]    [Pg.47]    [Pg.46]    [Pg.539]    [Pg.657]    [Pg.4016]    [Pg.573]    [Pg.34]    [Pg.348]    [Pg.18]   
See also in sourсe #XX -- [ Pg.215 ]




SEARCH



Dimethyl-dithiocarbamates

Sodium dithiocarbamate

© 2024 chempedia.info