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What is Silicon Monoxide? ? Silicon monoxide The chemical formula for SiO is an inorganic substance. Under normal temperatures and pressure, the powder is black-brown or yellowish. It has a melting and boiling point of 1802degC respectively. The density of the powder is 2.13g/cm3. It is not very soluble in liquid water. However, it can dissolve in a mix of dilute hydrofluoric acids and nitrics and produce silicon tetrafluoride. When heated in air, this produces white silica. The silicon monoxide in the air will oxidize and become silicon dioxide. When the silicon monoxide vapour is slowly vaporized, it will disproportionate (see disproportionation reactions) into silicon dioxide and silica.
Silicon monoxide preparation
1. After silicon dioxide has reacted with elemental silicon, rapid cooling is required to make silicon monoxide.
SiO2 + S – 2SiO.
2. Mix silicon dioxide with SiO2 of 99.5% with coal tar powder. The C/SiO2 molar mixing ratio is 2.0. Heat the mixture under reduced pressure. Temperature is 1600 and pressure is 1.013kPa.

Property and stability properties of silicon monoxide
Silicon monoxide The material is not stable. It will oxidize into silicon dioxide in air and only remains stable at temperatures over 1200degC.
Avoid open flames and high temperatures. It is insoluble with water and soluble with a mix acid of hydrofluoric acid dilute and nitric. Heat and electricity are well insulated by this material. It is oxidized in air and forms a silicon oxide film. In oxygen, it burns and then reacts with the water to produce hydrogen. In the warm alkaline solution, hydrogen is formed, and then silicate is dissolved.
Silicon monoxide use
A fine silicon monoxide can be used to synthesize fine ceramic powders such as silicon carbide or silicon nitride. This is because of the high activity. Useful in the preparation optical glass and semiconductors.
As a protective layer, vaporize it and apply it to the mirror surfaces of optical instruments. Preparation semiconductor materials.

Silicomonoxide – Precautions
In the event of eye contact, rinse with lots of water immediately and take to a doctor.
Wear protective clothing.
Eyes, skin, and respiratory tract are all affected.
Most water bodies are only mildly affected by this substance. Do not allow large quantities of undiluted products to enter groundwater, waterways or sewage system.
Stable at normal temperatures and pressure. Avoid light, open flames and high temperature.
Place in a ventilated, dry and airtight place.
Inhalation – If the patient inhales, it is best to move them to fresh air.
Skin contact: Remove all contaminated clothing. Wash your skin with soap and warm water. Seek medical attention if you feel unwell.
Eye contact: Separate eyelids, and rinse them with normal saline. Seek medical attention immediately.
Ingestion – Rinse your mouth with water and avoid vomiting. Seek medical attention immediately.
Advice to help protect rescuers – Move the patient into a safe area. Consult with a doctor. The doctor should see this sheet of chemical safety information.

(aka. Technology Co. Ltd., a trusted global chemical supplier & manufacture with over 12 year’s experience in providing super-high-quality chemicals and nanomaterials. Silicon monoxide is produced by our company with a high level of purity, small particles and low impurity content. Please. Contact Us if necessary.