The use of thiophene, good stability

Thiocyanine is a fungicide with excellent performance. There are 3 common synthetic methods, including 2 2-mercaptobenzothiazole methods and 1 chloromethylation method. A 2-mercaptobenzothiazole method is to use 2-mercaptobenzothiazole and bromochloromethane to react to generate 2-chloromethylthio-benzothiazole, and 2-chloromethyl-thio-benzothiazole is then reacted with sodium thiocyanide Reaction to obtain thiocyanate; Another 2-mercaptobenzothiazole method is to first react bromochloromethane with sodium thiocyanate to generate chloromethyl thiocyanate, and then react chloromethyl thiocyanate with 2-mercaptobenzothiazole The reaction yields thiophene. The chloromethylation method is to first react 2-mercaptobenzothiazole with paraformaldehyde and hydrogen chloride to generate 2-chloromethylthio-benzothiazole, and then react 2-chloromethyl-thio-benzothiazole with sodium thiocyanate Get thiophene.

1. Application: TCMTB is a very economical and effective green fungicide. TCMTB belongs to the same category of products as BUSAN30L from Buckmam in the United States and BIOCIDE MT30 from Progiven in France. It can be effectively used in seed treatment and has a strong killing and control effect on the main bacteria, fungi and algae that exist. It has special effects on seed dressing, seed soaking and spraying to treat diseases such as anthracnose, rice blast, damping-off, dry-off and citrus canker, and has no cross-resistance with conventional drugs.

Toxicity: LD50 (oral/mouse)=6100mg/kg

Stability: relatively stable in acidic and weakly alkaline solvents, pH ≤ 8.5

Usage: TCMTB can be dispersed in water according to the corresponding proportion, and then it can be stirred sufficiently, and can be further diluted according to the situation. When diluting, TCMTB should be added to water, and water should not be added to TCMTB. TCMTB will slowly degrade in water, so it should be prepared and used immediately when preparing TCMTB emulsion.

2. Application: TCMTB stock solution or made into water emulsion can be directly added to the protected product and mixed evenly. The dosage is generally 0.2 to 0.5%.

3. Validity period: 2 years