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Barium sulfide

inorganic compound
Barium sulfide, an inorganic compound with chemical formula of BaS, is mainly used for making barium salt and lithopone, as well as rubber vulcanizing agent and leather depilatory agent, and as acaricide and sterilization agent.
Chinese name
Barium sulfide
Foreign name
barium sulfide
Alias
Barium monosulfide
chemical formula
BaS
molecular weight
one hundred and sixty-nine point three nine two
CAS login number
21109-95-5
EINECS login number
244-214-4
Melting point
1200 ℃ [2-3 ]
Water solubility
soluble
Density
4.25 g/cm³
Appearance
White crystalline powder
Security description
S28;S61
Hazard symbol
Xn
Hazard description
R20/22;R31;R50

Physical and chemical properties

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Melting point: 1200 ℃ [2-3 ]
Density: 4.25g/cm three
Steam pressure: 12600mmHg at 25 ° C
Appearance: white crystalline powder
Solubility: soluble in water [1]

Calculate chemical data

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Reference value for drainage parameter calculation (XlogP): None
Number of hydrogen bond donors: 0
Number of hydrogen bond receptors: 1
Number of rotatable chemical bonds: 0
Number of tautomers: 0
Topological molecule polar surface area (TPSA): 0
Number of heavy atoms: 2
Surface charge: 0
Complexity: 0
Number of isotope atoms: 0
Determine the number of atomic structure centers: 0
Number of uncertain atomic structure centers: 0
Determine the number of chemical bond structure centers: 0
Number of uncertain chemical bond structure centers: 0
Number of covalent bond units: 2 [1]

purpose

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It is mainly used for making barium salt and lithopone, as well as rubber vulcanizing agent, leather depilatory agent, acaricide and sterilization agent.

First aid measures

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Skin contact: Take off the contaminated clothes and wash the skin thoroughly with soapy water and clean water.
Eye contact: Lift the eyelid and flush with flowing water or physiological saline. 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 to induce vomiting. Use 2%~5% sodium sulfate solution for gastric lavage and catharsis. Get medical attention.

Fire fighting measures

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Hazardous combustion products: hydrogen sulfide, sulfide, barium oxide.
Fire extinguishing method: use carbon dioxide, dry powder and sand to extinguish the fire. It is forbidden to extinguish the fire with water, foam and acid-base extinguishing agent.

Leakage emergency treatment

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Isolate the leakage contaminated area and restrict access. It is recommended that emergency treatment personnel wear dust masks (full face masks) and acid and alkali resistant work clothes. Do not touch the leakage directly.
Small amount of leakage: avoid raising dust and collect it in a dry, clean and covered container with a clean shovel.
Large amount of leakage: covered with plastic cloth and canvas. Then collect and recycle or transport to waste disposal site for disposal.

Handling and storage

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Operation precautions: closed operation, local exhaust. Operators must be specially trained and strictly abide by the operating procedures. It is recommended that operators wear self-priming filter type dust mask, chemical safety goggles, rubber acid and alkali resistant clothing, and rubber acid and alkali resistant gloves. Keep away from kindling and heat sources, and smoking is strictly prohibited in the workplace. Use explosion-proof ventilation systems and equipment. Avoid dust generation. Avoid contact with oxidants and acids. Load and unload gently during transportation to prevent damage to packaging and containers. Fire fighting equipment and leakage emergency treatment equipment of corresponding types and quantities shall be provided. Empty containers may leave harmful substances.
Packaging method: fiberboard bucket, plywood bucket and cardboard bucket outside the plastic bag or two-layer kraft paper bag; Two layers of plastic bags or one layer of plastic bag outer gunny bags, plastic woven bags, latex cloth bags; Composite plastic woven bag outside the plastic bag (polypropylene three in one bag, polyethylene three in one bag, polypropylene two in one bag, polyethylene two in one bag); Ordinary wooden case outside plastic bag or two-layer kraft paper bag; Screw mouth glass bottles, iron cap pressure mouth glass bottles, plastic bottles or ordinary wooden boxes outside metal barrels (cans); Threaded glass bottles, plastic bottles or tinned sheet steel barrels (cans) are covered with bottom plate lattice boxes, fiberboard boxes or plywood boxes; Tin plated steel drum (can), metal drum (can), plastic bottle or metal hose corrugated box.
Precautions for storage: store in a cool, dry and well ventilated warehouse. Keep away from kindling and heat sources. The humidity in the warehouse should be no more than 85%. The package must be sealed to prevent moisture. It shall be stored separately from oxidants, acids and edible chemicals, and mixed storage is strictly prohibited. It should not be stored for a long time to avoid deterioration. Equip with corresponding types and quantities of fire-fighting equipment. The storage area shall be equipped with appropriate materials to contain leakage. The "five pairs" management system for extremely toxic substances shall be strictly implemented.

security information

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Safety terminology

S28:After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer).
After skin contact, immediately use a large amount of (designated by the manufacturer).
S61:Avoid release to the environment. Refer to special instructions/Safety data sheets.
Avoid releasing into the environment, refer to special instructions/safety receipt instructions.

Risk terminology

R20/22:Harmful by inhalation and if swallowed.
Harmful by inhalation and if swallowed.
R31:Contact with acids liberates toxic gas.
Contact with acid releases toxic gases.
R50:Very toxic to aquatic organisms.
Very toxic to aquatic organisms.