SODIUM HYDROSULFIDE

SODIUM HYDROSULFIDE - 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

SODIUM HYDROSULFIDE - 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.

SODIUM HYDROSULFIDE - 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

SODIUM HYDROSULFIDE - Upstream Downstream Industry

Raw Materials	Hydrogen sulfide Sodium hydroxide Sodium hydroxide
Downstream Products	Mercaptoacetic acid [4-(tert-butyl)phenyl]methanethiol 3,5-Dinitro-2-aminothiophene Pyridaben phorate 3-Mercapto-2-butanone Dilauryl thiodipropionate

SODIUM HYDROSULFIDE - Nature

Open Data Verified Data

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.

Last Update：2024-01-02 23:10:35

SODIUM HYDROSULFIDE - Preparation Method

Open Data Verified Data

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.

Last Update：2022-01-01 11:03:56

SODIUM HYDROSULFIDE - Use

Open Data Verified Data

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.

Last Update：2022-01-01 11:03:55

SODIUM HYDROSULFIDE - Safety

Open Data Verified Data

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.

Last Update：2022-01-01 11:03:57

SODIUM HYDROSULFIDE - Reference Information

EPA chemical substance information	information provided by: ofmpeb.epa.gov (external link)
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
toxic substance data	information provided by: pubchem.ncbi.nlm.nih.gov (external link)

Last Update：2024-04-10 22:29:15

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