Sodium sulfide is a chemical compound with the formula Na2S. It is a strong reducing agent and is used in a variety of industries, including the production of paper, textiles, and dyes. It is typically available in the form of yellow or red flakes.
Sodium sulfide flakes is highly corrosive and toxic, and should be handled with caution. It can cause irritation and burns to the skin and eyes, and inhaling its fumes can be harmful. It should be stored in a cool, dry place, away from heat and ignition sources.
In addition to its industrial uses, sodium sulfide flakes has a number of other applications. It is used in the laboratory as a reagent, and it is also used in the production of chemicals such as sodium thiosulfate and sodium hydrosulfide.
It is important to follow safety guidelines when handling sodium sulfide, as it can be dangerous if not used properly. If you have any concerns about handling this chemical, it is best to consult a qualified professional.
Appearance and properties: Colorless or beige granular crystal, with strong hygroscopicity, soluble in water, it is deliquescent, carbonated and deteriorated in the air, and constantly releases hydrogen sulfide gas. Industrial sodium sulfide is lump, and it is pink, brownish red or yellowish brown due to the impurities in it.
It is used for manufacturing of sulfide dyes and leather depilating agents, metal smelting, photography, and rayon denitration. It is widely used in leather making, papermaking, ore concentration, dye production, organic intermediates, printing and dyeing, pharmaceutical, monosodium glutamate, artificial fibers, special engineering plastics, polyphenylene sulfide, poly-alkaline rubber, as well as making of sodium hydrosulfide, sodium polysulfide and sodium thiosulfate, and also has certain use in the military industry.
① In the dye industry, it is used to manufacture sulfide dyes, sulfur black, sulfide blue or dye intermediate reducing agents, and mordant.
② It is used as flotation agent of ore in nonferrous metallurgical industry.
③ It is used as depilating agent of raw hide in leather industry.
④ It is used as papermaking cooker in papermaking industry.
⑤ Sodium sulfide is also used in the manufacturing of sodium thiosulfate, sodium polysulfide, sodium hydrosulfide and other products.
⑥ It is also widely used in textile, pigment, rubber and other industrial sectors.
|Identification||Chinese name: Sodium sulfide;|
Sodium sulfide; Sodium sulfide
|English name: Sodium sulfide;sodium monosulfide||Dangerous goods No.: 82011 (including crystal water≥30%);|
42009 (anhydrous or containing crystal water < 30%)
|Molecular formula: Na2S||Molecular weight: 78.04||CAS No.: 1313-82-2|
|Risk category: Category 8.2 corrosives presenting alkalinous properties (containing crystal water ≥ 30%)|
Category 4.2 spontaneously combustible articles (anhydrous or containing crystal water < 30%)
|UN No.: 1385 (anhydrous or containing crystal water < 30%);|
1849 (including crystal water ≥ 30%)
|Physical and chemical properties||Appearance and properties: Colorless or beige granular crystal; the industrial products are reddish brown or brick red block|
|Solubility: Soluble in water, insoluble in ether, slightly soluble in ethanol|
|Melting point/℃: 1180||Critical temperature/℃:||Relative density (water=1): 1.86|
|Boiling point/℃: No data||Critical pressure/MPa: Meaningless||Relative density (air=1): No data|
|Minimum ignition energy/mJ:||Saturated steam pressure/kPa: (℃)||Heat of combustion/( kJ·mol-1):|
|Risk of combustion and explosion||Flammability: Flammable||Flash point/℃: Meaningless||Polymerization hazard: No polymerization|
|Ignition temperature/℃: No data||Explosion limit/%: No data||Stability: Stable|
|Explosive substance level and group:|
|Incompatible materials: Acids and strong oxidants|
|Hazardous characteristics: Anhydrous substances are spontaneously combustible article, and their dust is prone to spontaneous combustion in the air. Decompose in acid and release highly toxic flammable gas. The powder and the air can form explosive mixture. Its aqueous solution is corrosive and strongly irritating. Start to evaporate at 100℃, and the vapor can corrode the glass.|
|Fire extinguishing methods: Firefighters shall wear full-body acid and alkali-resistant fire-fighting suits and air breathing apparatus to put out the fire. Move the container from the fire scene to an open place as much as possible. Keep fire containers cool by spraying water until the fire is over. It is not allowed to use acid-base fire extinguishing agents. Fire extinguishing agents: Water, spray water, sand.|
|Toxicity||Invading way: Inhalation, ingestion.|
Toxicity: Moderately toxic
Acute toxicity: LD50 208mg/kg (rat oral)
|Harm to human body||This product can decompose hydrogen sulfide in the gastrointestinal tract and cause hydrogen sulfide poisoning after oral administration. Corrosive to skin and eyes.|
|First aid||Skin contact: Immediately remove contaminated clothes and flush with a large amount of running water for 20~30min. If you feel unwell, seek medical advice. Eye contact: Immediately separate the eyelids, and rinse thoroughly with a large amount of running water or normal saline for 10~15 minutes. If you feel unwell, seek medical advice. Inhalation: Quickly leave the site to a place with fresh hair. Keep the respiratory tract unblocked. Have oxygen therapy if breathing is difficult. In case breathing or heartbeat stops, immediately perform cardiopulmonary resuscitation. Seek medical advice. Ingestion: Rinse mouth with water and then drink plenty of water. Do not induce vomiting. Seek medical advice.|
|Protection||Engineering control: Enclosed operation. Provide safety shower and eye bath facility. Respiratory protection: Filter type dust respirator must be worn in case of exposure to its dust. Eye protection: Wear chemical safety glasses. Body protection: Wear acid and alkali-resistant rubber suits. Hand protection: Wear acid and alkali-resistant rubber gloves. Others: No smoking, eating or drinking at working site, and wash hands before meals.|
|Spillage treatment||Isolate the contaminated spill area and restrict access. Eliminate all ignition sources. It is recommended that the handler should wear dust masks, acid and alkali-resistant suits, and acid and alkali-resistant rubber gloves. Do not touch broken containers and spills without wearing appropriate protective suit. Cut off sources of leaks as much as possible. Cover spills with plastic cloth to reduce scattering. Prevent water from entering the packaging container. Collect spills with a clean shovel and put in a clean and dry container with a loose lid and move the container away from the spill area.|
|Storage and transportation||Store in a cool and well-ventilated warehouse. Keep away from fire and heat sources. Seal the package. It shall be stored separately from oxidants and acids, and mixed storage shall not be allowed. It shall not be stored for a long time to avoid deterioration.|
Sodium sulphide, disodium monosulfide, Stinky alkali, disodium sulfide, sodium monosulfide, sodium sulfide (anhydrous), sodium sulfide (na2s), sodium sulfide (non-specific name), sodium sulfide [na2s], sodium sulfide, anhydrous, sodium sulfuret, sodium sulphide, anhydrous, Sodium sulfide, anhydrous, sodium sulfide, hydrated, with not less than 30% water, sodiumsulphide
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