Methidathion - Names and Identifiers
Name | Methidathion
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Synonyms | DMTP Ultracide Supracide Suprathion Supracide(R) METHIDATHION 'LGC' (1207) Methidathion Methiadathion METHIDIATHION Supracide Emulsion S-[(5-Methoxy-2-Oxo-1,3,4-Thiadiazol-3(2H)-Yl)Methyl] O,O-Dimethyl Phosphorodithioate O,O-Dimethyl Phosphorodithioate S-Ester With 4-[Mercaptomethyl]-2-Methoxy-Delta2-1,3,4-Thiadiazolin-5-One O,O-Dimethyl Phosphorodithioate, S-Ester With 4-[Mercaptomethyl]-2-Methoxy-Delta''-1,3,4-Thiadiazolin-5-One
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CAS | 950-37-8
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EINECS | 213-449-4 |
InChI | InChI=1/C6H11N2O4PS3/c1-10-5-7-8(6(9)16-5)4-15-13(14,11-2)12-3/h4H2,1-3H3 |
Methidathion - Physico-chemical Properties
Molecular Formula | C6H11N2O4PS3
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Molar Mass | 302.33 |
Density | 1.51 g/cm3 |
Melting Point | 39-40°C |
Boling Point | 347.7±52.0 °C(Predicted) |
Flash Point | 100°C |
Water Solubility | 0.024 g/100 mL |
Solubility | DMSO (Slightly), Methanol (Slightly) |
Vapor Presure | 2.5×10-4 Pa (20 °C) |
Appearance | solid |
Color | Colourless |
BRN | 619915 |
pKa | -4.17±0.40(Predicted) |
Storage Condition | 0-6°C |
Stability | Air Sensitive, Moisture Sensitive |
Refractive Index | 1.651 |
Physical and Chemical Properties | Pure product is colorless crystal. M. p.39 ~ 40 ℃ (1.33Pa), relative density 1.495 (20 ℃), vapor pressure 1.87 × 10-4Pa. The solubility at 20 ℃ is: cyclohexanone 850g/kg, acetone 690g/kg, xylene 600g/kg, ethanol 260g/kg, water 250mg/kg. Stable at room temperature for 2 years, stable in weakly acidic and neutral media, easy to hydrolyze under alkaline conditions, non-flammable and non-explosive. |
Use | It is an ideal scale-killing agent, which can also treat mites, whitefly and aphids, and has special effects on pear-growing lice |
Methidathion - Risk and Safety
Risk Codes | R21 - Harmful in contact with skin
R28 - Very Toxic if swallowed
R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
R41 - Risk of serious damage to eyes
R26 - Very Toxic by inhalation
R24 - Toxic in contact with skin
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Safety Description | S22 - Do not breathe dust.
S28 - After contact with skin, wash immediately with plenty of soap-suds.
S36/37 - Wear suitable protective clothing and gloves.
S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S60 - This material and its container must be disposed of as hazardous waste.
S61 - Avoid release to the environment. Refer to special instructions / safety data sheets.
S39 - Wear eye / face protection.
S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
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UN IDs | UN 2811 |
WGK Germany | 3 |
RTECS | TE2100000 |
Hazard Class | 6.1(a) |
Packing Group | II |
Toxicity | LD50 in adult male, female rats (mg/kg): 31, 32 orally (Gaines, Linder) |
Methidathion - Introduction
This standard substance is mainly used for measuring instrument calibration, analytical method evaluation and quality control, as well as the content determination and residue detection of corresponding components in related fields such as food, hygiene, environment and agriculture. It can also be used for value traceability or as a standard liquid reserve solution. It is diluted step by step and configured into various standard solutions for work. Preparation of 1. Samples This standard substance is made of pure Kaphos with accurate purity and fixed value as raw material, chromatographic acetone as solvent, and accurately configured by weight-volume method. Kaphos, English name: Methidathion,CAS number: 950-37-8 2. traceability and fixed value method This standard substance takes the configuration value as the standard value, and uses high performance liquid chromatography-diode array detector (HPLC-DAD) This batch of standard substances and quality control control samples are compared to verify the preparation value. By using preparation methods, measurement methods and measuring instruments that meet the requirements of metrological characteristics, the traceability of the value of the standard substance is guaranteed. 3. characteristic measure value and uncertainty (see certificate for details) Number name standard value (ug/mL) Relative expansion uncertainty (%)(k = 2)BW10202 The uncertainty of the standard value of the 1002 of phospin in acetone is mainly composed of raw material purity, weighing, constant volume, uniformity, stability and other uncertainty components. 4. uniformity test and stability inspection According to the JJF1343-2012 [General Principles and Statistical Principles of Standard Substance Setting], random sampling of sub-packed samples is carried out, uniformity test of solution concentration is carried out, and stability inspection is carried out. The results show that the standard material has good uniformity and stability. The standard substance is valid for 36 months from the date of setting the value. The development unit will continue to monitor the stability of the standard substance. If the value changes are found during the validity period, the user will be notified in time. 5. packaging, transportation and storage, use and precautions 1. Packaging: This standard substance is packed in borosilicate glass ampoules, about 1.2 mL/branch. When removing or diluting, the pipette quantity shall prevail. 2. Transportation and storage: ice bags should be transported, and extrusion and collision should be avoided during transportation; storage under freezing and dark conditions. 3. Use: Balance at room temperature (20 3 ℃) before unsealing, and shake well. Once the ampoule is opened, it should be used immediately and cannot be used as a standard substance after being fused again.
Last Update:2022-10-16 17:30:20