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Send EmailSodium Sulfohydrate, Sodium Sulfhydrate, Sodium Bisulfide, Sodium hydrosulfide, 16721-80-5
CAS: 16721-80-5
Molecular Formula: HNaS
Names and Identifiers
| Name | sodium hydrosulfide |
| Synonyms | sodiummercaptan sodium bisulfide hidrosulfurosodics Sodium Sulfhydrate Sodium sulfohydrate sodiumhydrosulphide sodium hydrosulfide sodium hydrosulphide hydrogensodiumsulfide Sodium Hydrogen Sulfide Sodium Hydrogen Sulphide sodiumhydrogensulfide(nahs) hydrogenosulfuredesodium(french) hydrogenosulfuredesodium,anhydre hydrogenosulfuredesodium,dihydrate |
| CAS | 16721-80-5 |
| EINECS | 240-778-0 |
| InChI | InChI=1/Na.H2S/h;1H2/q+1;/p-1/rHNaS/c1-2/h2H |
Physico-chemical Properties
| Molecular Formula | HNaS |
| Molar Mass | 56.06 |
| Density | 1,79 g/cm3 |
| Melting Point | 55°C |
| Flash Point | 90°C |
| Water Solubility | 620 g/L (20 ºC) |
| Appearance | Solid |
| Color | Off-white |
| Stability | Stable, but hygroscopic. Flammable solid. May ignite in air. |
| Sensitive | Moisture Sensitive & Hygroscopic |
| Physical and Chemical Properties | Colorless needle-like crystal, easy to deliquescence. Industrial products are generally solution, orange or yellow. The solubility is soluble in water and alcohol, and the aqueous solution is strongly alkaline. melting point 55°C flash point 90°C water-soluble 620g/L (20°C) |
| Use | It is used as an intermediate for various organic products and an adjuvant for sulfur dyes. It is also used for leather hair removal, desulfurization of mucus filaments, and production of chemical fertilizers and pesticides. |
Risk and Safety
| Risk Codes | R31 - Contact with acids liberates toxic gas R34 - Causes burns |
| Safety Description | S25 - Avoid contact with eyes. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S50A - |
| UN IDs | 2318 |
| RTECS | WE1900000 |
| TSCA | Yes |
| Hazard Class | 4.2 |
| Packing Group | II |
Upstream Downstream Industry
Nature
colorless needle Crystal, easy deliquescence. Hydrogen sulfide is released at the melting point. Soluble in water and alcohol. The aqueous solution is strongly alkaline. It decomposes with acid to generate hydrogen sulfide. Industrial products are generally solution, orange or yellow, bitter taste.
Preparation Method
absorption method; The hydrogen sulfide gas is absorbed by the sulfide alkali solution (or caustic soda solution). Because hydrogen sulfide gas is toxic, the absorption reaction should be carried out under negative pressure. In order to prevent excessive pollution of air by hydrogen sulfide gas in the tail gas, several absorbers will be operated in series in the production, and the hydrogen sulfide content will be reduced to a lower level by multiple absorption. The absorption solution was concentrated to obtain sodium hydrosulfide.
Use
dye industry for the synthesis of organic intermediates and the preparation of various sulfur dyes. Leather industry is used for depilation and tanning of hides, and also for wastewater treatment. The chemical fertilizer industry is used to remove the monomer sulfur from the activated carbon desulfurization agent. Is the manufacture of Ammonium Sulfide and pesticide ethyl mercaptan semi-finished materials. The mining industry is largely used for mineral processing of copper ores. In the production of man-made fibers for sulfite dyeing and other aspects.
Safety
The solid shall be packed in iron drum, the thickness of the iron sheet shall not be less than 0. 5mm, and the net weight of each barrel shall be 150kg. The lid shall be firmly sealed. Liquid sodium hydrosulfide with tank car or iron drum, plastic drum, when packed with iron drum net weight 200kg per barrel. Risk code: spontaneous combustion product. GB 4.2 category 42011,UN No.2318 (with water of crystallization <25%)I IMDG Code page 4262, category 4.2. Sodium hydrosulfide (containing ≥ 25% of the water of crystallization) UN NO. 2949;IMDE code 8225 pp., Class 8. It should be stored in a ventilated and dry warehouse. Transportation should be protected from rain and sun exposure. Sodium hydrosulfide in iron barreled shall be transported by shed car. Liquid sodium hydrosulfide shall be transported by tank car, and the package shall be kept intact. Do not lie down or put down, and do not contact with acid. Attention should be paid to fire prevention and corrosion prevention during transportation. Storage and transportation should be kept away from food and articles that react with hydrogen sulfide. When loading and unloading should be light to prevent packaging damage. In case of leakage of packaging barrels, it should be washed with water and welded tightly. In case of fire, it can be suppressed by water, sand and all kinds of fire extinguishing. Corrosive to the skin, should wear protective equipment for labor protection.
Reference Information
| Overview | sodium hydrosulfide is used in the dye industry as an adjuvant for the synthesis of organic intermediates and the preparation of sulfur dyes, in the leather industry for the depilation of hides and tanning, in the chemical fertilizer industry for removal of activated carbon desulfurizer in the monomer sulfur, in the mining industry for a large number of copper mineral processing, in the production of man-made fibers for sulfurous acid dyeing, etc, is the manufacture of Ammonium Sulfide and pesticide ethyl mercaptan semi-finished materials, but also for wastewater treatment. The production process of sodium hydrosulfide is relatively mature, but with the development of various economic forms and the increasing competition, it is required to reduce the input as much as possible to produce high quality and more products. At present, the preparation method of sodium hydrosulfide is a caustic soda absorption method, which requires the raw material gas to be relatively pure hydrogen sulfide gas, and mainly uses the tail gas for producing barium chloride or barium nitrate to react with sodium hydroxide solution to prepare sodium hydrosulfide. The production of sodium hydrosulfide by caustic soda requires no carbon dioxide in the raw material gas. If the raw material gas contains carbon dioxide, sodium carbonate will be generated in the production process: NaOH CO2 → Na2CO3 H2O, the formation of sodium carbonate not only reduces the yield of caustic soda, but also affects the quality of sodium hydrosulfide, affecting the use of users, carbon dioxide content is greater than 10%, in the production will also block equipment and pipelines, so that the production can not be normal. |
| toxicity | is corrosive to the skin, so you should wear protective equipment. |
| Use | It is used as an intermediate in organic synthesis, an auxiliary in the manufacture of sulfur dyes, hair removal of hides and tanning of leather, it is also used in the copper ore dressing dye industry for the synthesis of organic intermediates and the preparation of sulfur dyes. Leather industry is used for depilation and tanning of hides, and also for wastewater treatment. The chemical fertilizer industry is used to remove the monomer sulfur from the activated carbon desulfurization agent. Is the manufacture of Ammonium Sulfide and pesticide ethyl mercaptan semi-finished materials. The mining industry is largely used for mineral processing of copper ores. In the production of man-made fibers for sulfite dyeing and other aspects. It is used as an intermediate of various organic products and an adjuvant of sulfur dyes. It is also used for leather hair removal, desulfurization of mucus filaments, and production of fertilizers and pesticides |
| production method | absorption method hydrogen sulfide gas is absorbed by a sulfide alkali solution (or caustic soda solution). Because hydrogen sulfide gas is toxic, the absorption reaction should be carried out under negative pressure. In order to prevent excessive pollution of air by hydrogen sulfide gas in the tail gas, several absorbers will be operated in series in the production, and the hydrogen sulfide content will be reduced to a lower level by multiple absorption. The absorption solution was concentrated to obtain sodium hydrosulfide. Its H2S NaOH → NaHS h2h2s Na2S → 2NaHS |
| category | corrosive article |
| toxicity grade | high toxicity |
| Acute toxicity | abdominal injection-rat LD50: 14.6 mg/kg; Abdominal injection-mouse LD50: 18 mg/kg |
| flammability hazard characteristics | water-splitting toxic sodium hydroxide and sodium sulfide |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; It is stored separately from acids, combustibles and oxidants |
| extinguishing agent | Water |
