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Trisulfide, bis(4-methylphenyl), also known as (C7H7S)2S3, is a yellowish, foul-smelling solid chemical compound. It is insoluble in water but readily soluble in organic solvents. Trisulfide, bis(4-methylphenyl) is known for its insecticidal properties and is utilized in various applications, including as a laboratory reagent and in the production of other chemicals.

4991-51-9

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4991-51-9 Usage

Uses

Used in Chemical Synthesis:
Trisulfide, bis(4-methylphenyl) is used as a laboratory reagent for the synthesis of other chemicals. Its unique chemical structure allows it to be a valuable intermediate in the production of various compounds.
Used in Insect Repellents:
Due to its insecticidal properties, Trisulfide, bis(4-methylphenyl) is used as an active ingredient in some insect repellents. It helps in deterring insects and protecting against their bites, which can be beneficial in both agricultural and personal care applications.
Used in Pest Control:
In the agricultural industry, Trisulfide, bis(4-methylphenyl) is used as a pesticide to control pests. Its effectiveness in eliminating insects makes it a useful tool in protecting crops and maintaining agricultural productivity.
Safety Precautions:
Trisulfide, bis(4-methylphenyl) is a flammable compound and should be handled with caution. It can release toxic fumes when heated or burned, so proper safety measures must be taken to prevent accidents and ensure the well-being of those who work with it.

Check Digit Verification of cas no

The CAS Registry Mumber 4991-51-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,9,9 and 1 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 4991-51:
(6*4)+(5*9)+(4*9)+(3*1)+(2*5)+(1*1)=119
119 % 10 = 9
So 4991-51-9 is a valid CAS Registry Number.

4991-51-9Relevant academic research and scientific papers

Electrochemical Synthesis of Organic Polysulfides from Disulfides by Sulfur Insertion from S8 and an Unexpected Solvent Effect on the Product Distribution

F?hrmann, Jan,Hilt, Gerhard

, p. 11141 - 11149 (2021/06/09)

An electrochemical synthesis of organic polysulfides through sulfur insertion from elemental sulfur to disulfides or thiols is introduced. The highly economic, low-sensitive and low-priced reaction gives a mixture of polysulfides, whose distribution can be influenced by the addition of different amounts of carbon disulfide as co-solvent. To describe the variable distribution function of the polysulfides, a novel parameter, the “absorbance average sulfur amount in polysulfides” (SAP) was introduced and defined on the basis of the “number average molar mass” used in polymer chemistry. Various organic polysulfides were synthesized with variable volume fractions of carbon disulfide, and the yield of each polysulfide was determined by quantitative 13C NMR. Moreover, by using two symmetrical disulfides or a disulfide and a thiol as starting materials, a mixture of symmetrical and asymmetrical polysulfides could be obtained.

3,4-Dichloro-1,2,5-thiadiazole: a commercially available electrophilic sulfur transfer agent and safe resource of ethanedinitrile

Gorjian, Hayedeh,Khaligh, Nader Ghaffari

, (2021/11/04)

3,4-Dichloro-1,2,5-thiadiazole is introduced as a safe and efficient sulfur transfer reagent. By applying this commercially available reagent, the symmetrical trisulfides and ethanedinitrile were simultaneously obtained by reacting various thiols with this reagent at room temperature. This reagent is non-toxic, inexpensive, and commercially available. In addition, no higher-order polysulfides were detected in all cases after the completion of the reaction. The short reaction times (20–50 min), excellent selectivity, and high yield of the trisulfides are some attractive merits of this reagent for the preparation of trisulfides. The reaction is one-pot, and isolation-purification of intermediates is not required. The procedure was readily scaled up to 5 grams. A mechanism is presented to explain the chemistry.

Accelerated reduction and solubilization of elemental sulfur by 1,2-aminothiols

Stoffel, Jonathan T.,Riordan, Kimberly T.,Tsui, Emily Y.

supporting information, p. 12488 - 12491 (2021/12/04)

Nucleophilic 1,2-aminothiol compounds readily reduce typically-insoluble elemental sulfur to polysulfides in both water and nonpolar organic solvents. The resulting anionic polysulfide species are stabilized through hydrogen-bonding interactions with the proximal amine moieties. These interactions can facilitate sulfur transfer to alkenes.

TBAF promoted formation of symmetrical trisulfides

Lach, Slawomir,Witt, Dariusz

, p. 10 - 14 (2014/02/14)

We have developed a new method for the synthesis of functionalized symmetrical trisulfides based on (5,5-dimethyl-2-thioxo-1,3,2-dioxa-phosphorin- 2-yl)disulfanyl derivatives prepared from readily available 5,5-dimethyl-2-sul- fanyl-2-thioxo-1,3,2-dioxaph

Novel and efficient methods for the synthesis of symmetrical trisulfides

Kertmen, Ahmet,Lach, Slawomir,Rachon, Janusz,Witt, Dariusz

experimental part, p. 1459 - 1462 (2009/12/08)

We have developed convenient methods for the synthesis of symmetrical trisulfides under mild conditions in very good yields. The described methods are based on the straightforward preparation of (5,5-dimethyl-2-thioxo-1,3,2- dioxaphosphorin-2-yl)disulfany

Rhodium-catalyzed sulfur atom exchange reaction between organic polysulfides and sulfur

Arisawa, Mieko,Tanaka, Ken,Yamaguchi, Masahiko

, p. 4797 - 4800 (2007/10/03)

RhH(PPh3)4 and cis-1,2-bis(diphenylphosphino)ethylene (dppv) catalyze the exchange of sulfur atoms between sulfur and organic polysulfides. The exchange of dialkyl trisulfides with sulfur proceeds at a high efficiency within 5 min at room temperature yielding a mixture of organic polysulfides.

Optimization of the synthesis of symmetric aromatic tri- and tetrasulfides

Zysman-Colman, Eli,Harpp, David N.

, p. 2487 - 2489 (2007/10/03)

The reaction of aromatic thiols with sulfur dichloride and sulfur monochloride to form the corresponding aromatic trisulfides, 2a-d, and tetrasulfides, 3a-d, has been optimized with respect to yield and purity. The use of pyridine as an amine base and the

Kaolinitic clay catalyzed reaction of sulfur monochloride with aromatics: An efficient and high yield synthesis of symmetrical disulfides

Vyas, Renu,Chanda, Bhanu,Sudalai

, p. 43 - 44 (2007/10/03)

Kaolinitic clay efficiently catalyses the reaction of sulfur monochloride with arenes to yield symmetrical 4,4′ arene disulfides in a single step under heterogeneous phase.

Use of a sacriflcial-sulfur electrode in electroorganic chemistry. V. Formation of the sequence CSSSC from S and thiols or thiolates

Do, Quang Tho,Elothmani, Driss,Simonet, Jacques,Guillanton, Georges Le

, p. 273 - 281 (2007/10/03)

At a working potential of about +2.0 V (vs SCE) the carbon-sulfur electrode is a source of the electrogenerated cation S2+. In organic media, this electrophile reacts with thiols (or thiolates) to give a mixture of polysulfides of which the trisulfide is the main product. The reaction between electrogenerated Sy2- and alkyl halides is less selective. Elsevier,.

Displacement of aromatic nitro groups by anionic sulfur nucleophiles: reactivity of aryl disulfide and thiolate ions towards dinitrobenzenes in N,N-dimethylacetamide

Robert, Julie,Anouti, Meriem,Bosser, Gerard,Parrain, Jean-Luc,Paris, Jacky

, p. 1639 - 1644 (2007/10/02)

Nucleophilic substitutions of 1,2- and 1,4-dinitrobenzenes (oDNB and pDNB) by thiolates ArS- (a) and aryl disulfide ions ArS2- (b) have been studied in dilute solutions by spectroelectrochemistry in N,N-dimethylacetamide.Compounds 1b-2b are the predominant reactive species in ArSx- (x=2) solutions when sulfur is added to electrogenerated thiolates 1a-2a.In all cases the addition of dinitrobenzenes led to the fast displacement of one of the NO2 groups at room temperature.With thiolate ions, the stoichiometric formation of the expected unsymmetrical diaryl monosulfides NO2C6H4SAr was observed.Aryl disulfide ions reacted in two successive steps: (i) SNAr substitution affording NO2C6H4S2Ar; (ii) displacement of NO2C6H4Sx- ions (x=1,2) by S-nucleophilic attack of the S-S bond or a concurrent redox process.Reactions between 4-CH3C6H4Sx- (x=2) ions and oDNB or pDNB which were performed on the preparative scale confirmed the formation of mixtures of Ar2S2 and Ar2S3 symmetrical polysulfides.

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