Iodomethane, a halogenated hydrocarbon, chemical formula CHthreeI、MeI，It is a monoiodide substitute of methane, which can be miscible with common organic solvents. The pure product is a colorless transparent liquid. When exposed to sunlight, it will decompose into iodine simple substance with purple color, which can be removed by adding metal copper.Iodomethane is a commonly used methylation reagent in organic synthesis.
On October 27, 2017, the list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization (WHO) was preliminarily collated and referenced, and iodomethane was included in the list of category 3 carcinogens.[2]
4. Carcinogenicity: IARC Carcinogenicity Comment: G3, insufficient evidence of carcinogenicity to humans and animals.[1]
purpose
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1. It is used as a methylation reagent.
2. It has been proposed to be used as a bactericide, herbicide, insecticide or nematicide and as a component of fire extinguishers.
3. It is used as a soil disinfectant and a substitute for methyl bromide (prohibited by the Montreal Convention).
4. Used in medicine, organic synthesis, pyridine inspection, microscopy, etc.[1]
Preservation and purification
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Like many other organic iodides, methyl iodide reagent is usually stored in a brown bottle to prevent it from decomposing into elemental iodine in the presence of light, which makes the reagent slightly purple.Commercial methyl iodide reagents are usually stabilized by adding copper or silver wires.You can also use it firstSodium thiosulfateThe iodine is removed by distillation after washing.
Emergency Management
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Leakage emergency treatment
Evacuate the personnel in the leakage contaminated area to the safe area quickly, isolate them for 150 meters immediately, and strictly restrict access.Cut off the ignition source.It is recommended that emergency personnel wear self-contained positive pressure respirators and anti poison clothing.Do not touch the leakage directly.Cut off the source of leakage as far as possible to prevent it from entering into restricted spaces such as sewers and flood discharge ditches.Small amount of leakage: mixed with sand, dry lime or soda ash.Large amount of leakage: build a dike or dig a pit to receive.Cover with foam to reduce steam disaster.Use explosion-proof pump to transfer to tank car or special collector for recycling or transport to waste disposal site.
Protective measures
Respiratory system protection: When the concentration in the air exceeds the standard, wear a self-priming filter gas mask (half mask).
Eye protection: wear chemical safety goggles.
Body protection: penetrating gas type anti-virus clothing.
Hand protection: wear chemical resistant gloves.
Others: Smoking, eating and drinking are prohibited at the work site.After work, take a bath and change clothes.Store clothes contaminated by poison separately.After washing, use it as standby.Pay attention to personal hygiene.
First aid measures
Skin contact: Take off the contaminated clothes and wash the skin thoroughly with soapy water and clean water.Get medical attention.
Eye contact: Lift the eyelids and wash them thoroughly with a large amount of flowing water or physiological saline for at least 15 minutes.Get medical attention.
Inhalation: quickly leave the site to a place with fresh air.Keep the respiratory tract unobstructed.If breathing is difficult, give oxygen.If breathing stops, perform artificial respiration immediately.Get medical attention.
Ingestion: drink enough warm water, induce vomiting, and seek medical advice.
security information
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Safety terminology
S9：Keep container in a well-ventilated place.
Keep the container in a well ventilated place.
S16：Keep away from sources of ignition - No smoking.
Keep away from ignition sources and no smoking.
S24：Avoid contact with skin.
Avoid skin contact.
S36/37：Wear suitable protective clothing and gloves.
Wear appropriate protective clothing and gloves.
S38：In case of insufficient ventilation, wear suitable respiratory equipment.
Wear proper respirator in case of poor ventilation.
S45：In case of accident or if you feel unwell, seek medical advice immediately (show the lable where possible).
In case of an accident or feeling unwell, seek medical advice immediately (show the label if possible).
