二硫氰基氧甲烷
Methylene dithiocyanate
CAS: 6317-18-6
Molecular Formula: C3H2N2S2
二硫氰基氧甲烷 - Names and Identifiers
| Name | Methylene dithiocyanate |
| Synonyms | MTC cp17879 Busan 110 Amerstat 282 Antiblu 3737 Methylendirhodanid Methylendithiokyanat Methylenedithiocyanate Methylene dithiocyanate Methane, dithiocyanato- methylene bisthiocyanate Methylene Bisthiocyanate methylendirhodanid(czech) Methylene bis(thiocyanate) methanediyl bis(thiocyanate) |
| CAS | 6317-18-6 |
| EINECS | 228-652-3 |
| InChI | InChI=1/C3H2N2S2/c4-1-6-3-7-2-5/h3H2 |
| InChIKey | JWZXKXIUSSIAMR-UHFFFAOYSA-N |
二硫氰基氧甲烷 - Physico-chemical Properties
| Molecular Formula | C3H2N2S2 |
| Molar Mass | 130.18 |
| Density | 1.492 (estimate) |
| Melting Point | 104-106°C(lit.) |
| Boling Point | 285.2±23.0 °C(Predicted) |
| Flash Point | >110°C |
| Water Solubility | Decomposes in water. Slightly soluble in organic solvents. |
| Solubility | very slightly in Methanol |
| Vapor Presure | 0.00284mmHg at 25°C |
| Appearance | White crystal |
| Color | White to Light yellow to Light orange |
| Storage Condition | Room Temprature |
| Stability | Stable, but moisture sensitive. Reacts vigorously with strong bases, strong oxidizing agents. Reacts with water. |
| Refractive Index | 1.5300 (estimate) |
| MDL | MFCD00001833 |
| Physical and Chemical Properties | Melting Point: 102 - 106 ℃ |
| Use | Made of emulsifiable concentrate for rice, wheat seed treatment, can control the spread of bacteria, fungi and nematode diseases, is also a kind of efficient, broad-spectrum bactericidal Algaecide |
二硫氰基氧甲烷 - Risk and Safety
| Risk Codes | R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R36/37 - Irritating to eyes and respiratory system. R50 - Very Toxic to aquatic organisms R43 - May cause sensitization by skin contact R34 - Causes burns R26 - Very Toxic by inhalation R25 - Toxic if swallowed |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S28 - After contact with skin, wash immediately with plenty of soap-suds. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S28A - |
| UN IDs | UN 2811 6.1/PG 2 |
| WGK Germany | 3 |
| RTECS | XL1560000 |
| TSCA | Yes |
| HS Code | 29309090 |
| Hazard Class | 8 |
| Packing Group | II |
| Toxicity | LD50 oral in rat: 55mg/kg |
二硫氰基氧甲烷 - Upstream Downstream Industry
| Raw Materials | Thiourea Sodium sulfocyanate |
二硫氰基氧甲烷 - Nature
Open Data Verified Data
pale yellow or nearly colorless needle-like crystals. The melting point was 102-104 °c. Insoluble in water, soluble in N,N'-dimethylformamide, slightly soluble in other organic solvents.
Last Update：2024-01-02 23:10:35
二硫氰基氧甲烷 - Preparation Method
Open Data Verified Data
with dihaloalkane (such as dichloromethane, dibromomethane, diiodomethane) and sodium cyanate sulfate as raw materials, under certain temperature and pressure, in ethanol and water medium synthesis.
Last Update：2022-01-01 09:29:26
二硫氰基氧甲烷 - Use
Open Data Verified Data
dithiocyanomethane is a highly efficient, broad-spectrum bactericidal algicide, which has a high efficacy in killing the main bacteria, fungi and algae present in the circulating water, and the efficacy is maintained for a long time. As long as the concentration of 0. 3mg/L in water is maintained, it can effectively kill microorganisms. It is a non-oxidizing bactericide. The bactericidal and antibacterial effects of dithiocyanomethane are related to the pH value of water, and it has a good stable bactericidal effect in the range of pH 6~7. When the pH value is higher than 8.5, the decomposition is easy, and the sterilization effect is affected. Since dithiocyanomethane is insoluble in water and cannot be used directly, it is generally used in combination with solvents, dispersants or other bactericidal agents.
Last Update：2022-01-01 09:29:27
二硫氰基氧甲烷 - Safety
Open Data Verified Data
can cause eye damage and skin irritation, swallowing or adsorption is harmful and can even be fatal. Protection should be done to avoid contact with the skin. Keep away from heat and fire sources during storage and transportation.
Last Update：2022-01-01 09:29:27
二硫氰基氧甲烷 - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | dithiocyanate is also known as methyl dithiocyanate, dithiocyanate, dithiocyanate methylene Ester, referred to as MBT. Pale yellow or nearly colorless needle-like crystals. Molecular weight 130.2, relative density (20 °c) 1.1±0.1,m. p. 102~104 °c, flash point 53 °c. Practically insoluble in water, the solubility in water at room temperature is 2.3 x 10-6. Therefore, when using, usually to add some special dispersant and penetrant. Dissolved in dioxane, dimethylformamide, micro-soluble in other organic solvents. MBT is stable in the pH range of 6 to 6.5, but hydrolyzes rapidly at pH 8. Under pressure, excess sodium thiocyanate (or sodium thiocyanate) and methylene chloride are added to the reaction kettle, and the temperature is raised to 80-100 ° C. While stirring is started. After completion of the reaction, dichloromethane was recovered and the solid-liquid two phases were separated to obtain crude dithiocyanomethane. The main uses of dithiocyanomethane are as follows: 1, used as anti-mildew preservative for leather, wood and so on. 2, used for soaking rice seeds to control various leaf spot diseases. 3, for swimming pool water sterilization Disinfection. 4, for industrial circulating water treatment. 5, used to reduce oil layer pollution, prevent clay swelling, sterilization and scale prevention, and increase production. 6, widely used in water treatment, sterilization and killing algae. 7, used as fish medicine, widely used in aquaculture. |
| bactericide | dithiocyanomethane is a kind of efficient and broad-spectrum excellent fungicide, which has good effect on bacteria, mold, algae have a strong ability to kill. When the dosage was 10 ~ 100mg/kg, the bactericidal rate was 99%, and the effect was better when the pH was 7. It has a good killing and inhibiting effect on the main bacteria, fungi and algae existing in industrial water, as well as protozoa, especially for sulfate reducing bacteria. Dithiocyanomethane is a non-oxidizing bactericide that does not exhibit reduced activity due to contaminants, debris, or other particulate matter in the water system. At the same time, the toxicity is reduced after hydrolysis, which is beneficial to the discharge. Therefore, it is widely used in industrial circulating cooling water (such as large chemical fertilizer, oil refinery, power plant, etc.), sewage wastewater, oil field water injection as sterilization and sludge prevention agent. It can also be used in the paperboard industry for paper and food packaging. Water Treatment Bactericide, also known as bactericidal algicide, sludge stripping agent, is a chemical that can inhibit the growth of bacteria, algae and microorganisms in water to prevent the formation of microbial slime and cause harm to the system. Water treatment bactericides are generally divided into two categories: Oxidizing bactericides and non-oxidizing bactericides. The former is a strong oxidizing agent, which has a strong killing effect on microorganisms in water. The latter are non-oxidizing agents that do not kill microorganisms by oxidation, but that the toxic agents act on specific parts of the microorganisms to kill. oxidizing bactericides, such as chlorine, sodium hypochlorite, bleaching powder, etc. There are many types of non-oxidizing biocides, including chlorophenols (the most commonly used is G4), such as dodecyldimethylbenzyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide, dithiocyanate, etc, organic sulfur compounds (commonly used dithiocyanomethane), metal salts (such as copper sulfate) and a new type of biocide isothiazolinone. Heavy metal compounds, such as mercury oxide, mercury chloride, Mercury fluoride, etc.; Slime fungicides, such as rosin amine, hydrogen peroxide, biguanide polymer, etc. Among them, quaternary ammonium salt non-oxidizing bactericides are widely used, and have a variety of functions such as sterilization, stripping, corrosion inhibition and so on. Chlorophenols, organosulfur compounds and metal salt biocides are limited in their use due to their high toxicity to aquatic animals, and their use is decreasing. in certain aspects, non-oxidative biocides are more effective and convenient than oxidative biocides. Therefore, In many cooling water systems, the two are often used in combination. Some cooling water systems are treated with intermittent chlorination and a non-oxidizing biocide once a week or half a month to further improve the control of microorganisms. |
| toxicity | 0.5mg/kg Po was given to rats, but no signs of toxicity occurred during social activities; however, when the dose was 1 mg/kg, the rats showed painful symptoms and decreased activity. The results showed that the product had no mutagenicity. This product is highly toxic to fish. Its LC50(48 hours) values for eel, rainbow trout and flower trout are 0.007/L,0.004/L and 0.007/L respectively; the LC50(96 hours) values for the fish listed above are 0.004ml/L,0.002ml/L and 0.004ml/L, respectively. |
| insecticide synergism | a long time ago, dithiocyanomethane has been used for sterilization Disinfection, wood preservation, algaecide, anti-fouling, etc. China's Nankai University organic elements found that although this product has no insecticidal activity, but the pyrethroid insecticides have a high synergistic activity, so the research and development. The experimental study showed that the synergistic effect of dithiocyanomethane mixed with deltamethrin, cypermethrin, cyhalothrin, fenvalerate and permethrin was more than 50%: 2.5 mg/kg and 10 mg/kg:5 mg/kg), the synergistic effect of broad bean aphid was 1.07 and 0.89 times respectively. |
| analysis method | The original drug can be analyzed by Reversed-phase high performance liquid chromatography with Li-Crosorb RP-18, methanol/water (flow rate (2mL/min)) was used as eluent and measured at 254nm with UV detector. When the aqueous solution containing 2 mg/kg of active ingredient is determined by this method, the sample can be directly injected. |
| Use | bactericide. After made of emulsifiable concentrate for rice, wheat seed treatment, can control species-borne bacterial, fungal and nematode diseases, is also a kind of efficient, broad-spectrum bactericidal algicide Industrial bactericidal antifungal used in the manufacture of cables, wires, tires and other rubber products. Efficient, broad-spectrum bactericidal algicide. Fungicide. |
| production method | dihalomethane and sodium thiocyanate (NaSCN) were synthesized in ethanol-water medium at 75 ℃, the reaction pressure is 0.3-0.4MPa, and methyl dithiocyanate can be obtained. |
| category | pesticide |
| flammability hazard characteristics | combustion to produce toxic oxides of nitrogen and sulfur gases |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored and transported separately from food raw materials |
| extinguishing agent | dry powder, foam, sand |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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Raw Materials for 二硫氰基氧甲烷