6317-18-6 Usage
Chemical Properties
Colorless needle-like crystals or yellow crystalline powder. Melting point 102-104 ℃. Soluble in dioxane, dimethylformamide, slightly soluble in other organic solvents. The solubility in room temperature water is 2300 ppm. It is very sensitive to pH, and hydrolyzes quickly above pH=8.
Uses
Methylene Dithiocyanate emulsion is used as bactericide.
Definition
ChEBI: Methylene dithiocyanate is a member of the class of thiocyanates that is methane in which two of the hycrogens have been replaced by thiocyanato groups. Used as a biocide for the control of various pathogens and algae in industrial water systems and as a fungicide for the control of surface moulds and sapstain fungi on wood. It has a role as a fungicide and an antibacterial agent.
Preparation
Synthesis of methylene dithiocyanate: under pressure, add excess sodium thiocyanate (or sodium thiocyanate) and dichloromethane into the reaction kettle, start stirring, and heat up to 80-100°C at the same time. After the reaction is completed, dichloromethane is recovered, and the solid-liquid two phases are separated to obtain a crude methylene dithiocyanate.
General Description
Methylenebis(thiocyanate) appears as yellow to light orange-colored mass or yellow powder. (NTP, 1992)
Air & Water Reactions
May be sensitive to prolonged exposure to air. Decomposes in water (not vigorously) and more rapidly in boiling water.
Reactivity Profile
Methylenedithiocyanate reacts vigorously with strong bases and strong oxidizing agents such as hydrogen peroxide. Hydrolyzes slowly with water at boiling temperatures and reacts slowly and exothermically with aqueous acids .
Fire Hazard
Flash point data for Methylenedithiocyanate are not available; however, Methylenedithiocyanate is probably combustible.
Check Digit Verification of cas no
The CAS Registry Mumber 6317-18-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,3,1 and 7 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 6317-18:
(6*6)+(5*3)+(4*1)+(3*7)+(2*1)+(1*8)=86
86 % 10 = 6
So 6317-18-6 is a valid CAS Registry Number.
InChI:InChI=1/C3H2N2S2/c4-1-6-3-7-2-5/h3H2
6317-18-6Relevant articles and documents
Wood preservatives
-
, (2008/06/13)
Wood preservatives having biocidal properties which include quaternary ammonium compounds of general formula (I): wherein R1 is a C8-18-alkyl group or an optionally substituted benzyl group, R2 is a C8-18-alkyl group, R3 is a C1-4-alkyl group or a group of the formula —[CH2—CH2—O]n—H, R4 is a C1-4-alkyl group, n is a number from 0.5 to 8, preferably from 1 to 5, and A?is the anion of an organic carboxylic acid which contains 2 to 12 C atoms and carries at least one hydroxyl, amino or sulfonic acid group. The wood preservatives also penetrate deeply into the wood without the use of pressure, and have only a mild corrosive action on metals. Furthermore, a process for treating timbers with these compositions, concentrates for the preparation thereof, the use of new and known quaternary ammonium compounds in wood preservatives and new quaternary ammonium compounds and their use as biocides.
Reaction of Guanidinium Salts with Alkyl Bromides and Acid Chlorides
Kantlehner, Willi,Kapassakalidis, Johannis J.,Speh, Peter,Braeuner, Hans-Juergen
, p. 389 - 393 (2007/10/02)
The guanidinium salt 1a reacts with alkyl bromides 2a-g and acid chlorides 2h-k to give the nitriles 3a-g and the acyl cyanides 3h-k, respectively.Acyl isocyanates 4a,b have been obtained from the guanidinium cyanate 1d and the acid chlorides 2h,l.Reaction of the alkyl bromides 2b,c,m,n and acid chlorides 2h,l with the guanidinium thiocyanate 1e affords alkyl thiocyanates 5a-d and acyl isothiocyanates 6a,b, respectively.
