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Anonymous users2024-02-11The production process of acetylene gas is complex, first of all, coke and calcium oxide (molecular formula CAO) are smelted in an electric furnace of about 2200 to generate calcium carbide (molecular formula CAC2, commonly known as calcium carbide, in fact, the upstairs is not wrong, CAC3 is fired at a high temperature to become CAO, but the chemistry book (it seems not to be a textbook) gives calcium oxide.
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Anonymous users2024-02-101 Pinyin 2 English references.
3 GB number.
4 CAS number.
5 Chinese name.
6 English name.
7 Alternative names for calcium carbide.
8 Molecular Formula.
9 Appearance and character.
10 molecular weight.
11 Melting Point.
12 density.
13 Stability.
14 Hazard Markings.
15 Main Uses.
16 Health Hazards.
17 Toxicological data and environmental behavior.
18 Laboratory monitoring methods.
19 Emergency treatment of leakage.
20 Precautions.
21 First Aid Measures.
tàn huà gài
calcium carbide
acetylenogen
Calcium carbide. calcium carbide；acetylenogen
Calcium carbide. cac2
Colorless crystals, industrial products are gray-black blocks, and the cross-section is purple or gray.
Relative density (water 1).
Stable. 10 (wet and flammable materials).
It is an important basic chemical, mainly used to produce acetylene gas; It is also used in organic synthesis, oxyyne welding, etc.
Invasion route: inhalation, ingestion.
Health hazards: damage, causing itching, inflammation, "bird's eye" ulcer slippery grip, meladerma. **Burns are long-term wound and chronic ulcer type. Workers exposed to it have a high incidence of sweating, tooth enamel damage, and dental caries.
Dangerous characteristics: non-flammable when dry, highly flammable acetylene gas can be quickly produced when exposed to water or moisture, and when it reaches a certain concentration in the air, it can cause a disaster. It can react violently with acids.
Combustion (decomposition) products: acetylene, carbon monoxide, carbon dioxide.
Determination of calcium carbide by acid volume method[Journal] Metallurgical analysis of Xu Surui. 1988,8（1）.55 56 Analytical Chemical Abstracts
Isolate leakage contaminated areas and restrict access. Cut off the source of fire. Emergency responders are advised to wear self-contained breathing apparatus and firefighting protective clothing.
Do not come into direct contact with spills. Small leaks: Mix with sand, dry lime or soda ash.
Use a non-sparking tool to collect in a dry, clean, covered container. Move to a safe place. Massive leaks:
Cover with plastic cloth and canvas to reduce the scattering of letters. Liaise with the relevant technical department to determine the method of removal.
Respiratory protection: When working, you should wear a self-priming filtering dust mask.
Eye protection: Wear chemical safety glasses.
Physical protection: Wear chemical protective clothing.
Hand protection: Wear rubber gloves.
Others: Smoking is strictly prohibited on the work site. Pay attention to personal hygiene.
**Contact: Immediately remove contaminated clothing and rinse with plenty of running water for at least 15 minutes. Medical treatment.
Eye contact: Lift the eyelid immediately and rinse thoroughly with plenty of running water or saline for at least 15 minutes. Medical treatment.
Inhalation: Quickly remove from the scene to fresh air. Keep your airways open. If you have difficulty breathing, give oxygen. If breathing stops, artificial respiration is performed immediately. Medical treatment.
Ingestion: Drink plenty of warm water, induce vomiting, and seek medical attention.
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Anonymous users2024-02-09Calcium carbide, the main component of calcium carbide, is an inorganic compound, white crystal, and the industrial product is gray-black lumps, and the cross-section is purple or gray. Immediately and violently reacts violently when exposed to water, producing acetylene and releasing heat deficits. Calcium carbide is an important basic chemical raw material, mainly used to produce acetylene gas.
It is also used in organic synthesis, oxyyne welding, etc.
Calcium carbide is called calcium carbide because it can conduct electricity, the higher the purity, the easier it is to conduct electricity, so it is called calcium carbide.
On October 27, 2017, the list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization was preliminarily sorted out for reference, and calcium carbide production was included in the list of three types of carcinogens.
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Anonymous users2024-02-08Calcium carbide (CAC2) is commonly known as calcium carbide. Industrial products are gray, yellow-brown or black, and purple with higher calcium carbide content. Its new section is shiny, gray or off-white when it absorbs moisture in the air.
It can conduct electricity, and the higher the purity, the better the conductivity, so it is called calcium carbide. It can absorb moisture in the air. Add water to decompose into acetylene and calcium hydroxide.
It reacts with nitrogen to form calcium cyanamide.
Calcium carbide is one of the basic raw materials for the organic synthetic chemical industry. It is an important raw material for acetylene chemical industry. Acetylene made from calcium carbide is widely used in metal welding and cutting.
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Anonymous users2024-02-07The chemical name of calcium carbide is calcium carbide and the molecular formula is CAC2, which is the basic raw material for the chemical industry of mechanical synthesis. Because calcium carbide can conduct electricity, the higher the purity, the easier it is to conduct electricity, so it is called calcium carbide.
The chemical properties of calcium carbide are very reactive. Acetylene gas and calcium hydroxide are produced by intense decomposition in water, and a large amount of heat is released. It reacts with nitrogen to form calcium cyanamide.
Calcium carbide is one of the basic raw materials for the organic synthetic chemical industry. It is an important raw material for acetylene chemical industry. Acetylene made from calcium carbide is widely used in metal welding and cutting.
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Anonymous users2024-02-06Calcium carbide (CAC2) is commonly known as calcium carbide. Industrial products are gray, yellow-brown or black, and purple with higher calcium carbide content. Its new section is shiny, gray or off-white when it absorbs moisture in the air.
It can conduct electricity, and the higher the purity, the better the conductivity, so it is called calcium carbide. It can absorb moisture in the air. Add water to decompose into acetylene and calcium hydroxide.
It reacts with nitrogen to form calcium cyanamide.
Calcium carbide is one of the basic raw materials for the organic synthetic chemical industry. It is an important raw material for acetylene chemical industry. Acetylene made from calcium carbide is widely used in metal welding and cutting.
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Anonymous users2024-02-05Calcium carbonate is an inorganic compound with the chemical formula CaCO3, which is the main component of limestone, marble, etc. Calcium carbonate is usually white crystals, odorless, basically insoluble in water, easy to reverse with acid, and should release carbon dioxide ridges. It is one of the common substances on the earth, found in aragonite, calcite, chalk, limestone, marble, travertine and other rocks, and is also the main component of the bones or shells of some animals.
Calcium carbonate is also an important building material and has a wide range of industrial uses.
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Anonymous users2024-02-041. Calcium carbide is an inorganic substance contained in pants, the chemical formula is CAC2, the main component of calcium carbide, white crystals, and the industrial product is gray-black lumps, and the section is purple or gray. Immediately and violently reacts violently with water, forming acetylene and releasing heat. Calcium carbide is an important basic chemical raw material, which is mainly used to produce acetylene gas.
It is also used in organic synthesis, oxyyne welding, etc.
On October 27, the World Health Organization's International Agency for Research on Cancer (IARC) released a preliminary list of carcinogens, and calcium carbide production was included in the list of three types of carcinogens.
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