556-64-9
Methyl thiocyanate
CAS: 556-64-9
Molecular Formula: C2H3NS
556-64-9 - Names and Identifiers
| Name | Methyl thiocyanate |
| Synonyms | CH3SCN Methyl thiocyanate Methylethiocyanate thiocyanatoMethane Methyl sulfocyanate Methane, thiocyanato- Thiocyanic acid methyl ester Methyl RhodanideThiocyanic Acid Methyl Ester |
| CAS | 556-64-9 |
| EINECS | 209-134-6 |
| InChI | InChI=1/C2H3NS/c1-4-2-3/h1H3 |
556-64-9 - Physico-chemical Properties
| Molecular Formula | C2H3NS |
| Molar Mass | 73.12 |
| Density | 1.08 |
| Melting Point | -5 °C |
| Boling Point | 131 °C |
| Flash Point | 38 °C |
| Water Solubility | Practically insoluble in water |
| Vapor Presure | 13.6mmHg at 25°C |
| Appearance | Liquid |
| Color | Clear colorless to light yellow |
| Merck | 14,6127 |
| Storage Condition | Poison room |
| Sensitive | Moisture Sensitive |
| Refractive Index | 1.467-1.469 |
| Physical and Chemical Properties | Colorless liquid. Melting Point -51 °c, boiling point 132.9 °c, relative density 1.0678(25/4 °c), refractive index 1.4669(25 °c). Soluble in alcohol and ether, very slightly soluble in water. There is an onion-like odor. |
556-64-9 - Risk and Safety
| Hazard Symbols | T - Toxic |
| Risk Codes | R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R10 - Flammable R36/37 - Irritating to eyes and respiratory system. |
| Safety Description | S28A - S27 - Take off immediately all contaminated clothing. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S16 - Keep away from sources of ignition. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| UN IDs | UN1992 |
| WGK Germany | 3 |
| RTECS | XL1575000 |
| TSCA | Yes |
| HS Code | 29309099 |
| Hazard Class | 3 |
| Packing Group | III |
| Toxicity | LD50 i.p. in mice: 315 nmoles/g (Ohkawa) |
556-64-9 - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | used to synthesize pesticides, medicines and other fine chemicals. |
| Production method | It is obtained by the reaction of dimethyl sulfate and potassium thiocyanide. Potassium thiocyanide is dissolved in water, dimethyl sulfate is added dropwise, the temperature is controlled below 60 ℃, and the dropwise addition is completed for about 3 hours. Then continue stirring for 2h. Leave overnight. The oil layer is washed with water to produce the finished product. |
| category | toxic substances |
| toxicity classification | highly toxic |
| acute toxicity | oral administration-rat LD50: 60 mg/kg; Abdominal injection-mouse LD50: 23 mg/kg |
| flammability hazard characteristics | open flame is combustible; high heat emits toxic nitrogen oxides and sulfur oxide gases |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; Store separately from oxidants, acids and food additives |
| fire extinguishing agent | foam, mist water, dry powder, sand. Disable acid-base fire extinguishing agent |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 21:11:58
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