PRODUCTS

SODIUM SULFHYDRATE

Sodium Sulfhydrate is also used in paints, lacquers, varnishes, textiles, effluent treatment, water purification, and cosmetics.
Sodium Sulfhydrate is also used as a corrosion inhibitor and coloring, complexing, and reducing agent.
Sodium Sulfhydrate is used as a flotation agent in ore processing.

CAS Number: 16721-80-5
207683-19-0 (hydrate)
EC Number: 240-778-0
Chemical formula: HNaS / HS.Na / NaHS
Molar mass: 56.063 g/mol

SYNONYMS:
Sodium sulfhydrate, sodium hydrosulfide, sodium hydrogen sulfide, sodium bisulphide, sodium mercaptan, Sodium hydrosulfide, Sodium bisulfide, Sodium sulfhydrate, Sodium hydrogen sulfide, SODIUM HYDROSULFIDE, Sodium bisulfide, 16721-80-5, Sodium sulfhydrate, Sodium sulfide (Na(SH)), Sodium hydrogen sulfide, Sodium mercaptan, Sodium mercaptide, NaHS, sodium sulfanide, Hydrogen sodium sulfide, Sodium sulfide (Na(HS)), Sodium hydrosulfide (Na(HS)), Sodium hydrogen sulfide (NaHS), Hidrosulfuro sodics, NA2922, Hydrogenosulfure de sodium, FWU2KQ177W, NSC-158264, DTXSID3029738, DTXCID409738, 240-778-0, RefChem:183933, Sodium hydrosulphide, sodium;sulfanide, Sodium Hydrogensulfide, MFCD00011124, CHEMBL1644699, HNaS, Hidrosulfuro sodics [Spanish], HSDB 5165, Hydrogenosulfure de sodium [French], EINECS 240-778-0, UN2318, UN2949, UNII-FWU2KQ177W, NSC 158264, AI3-14915, Sodium Sulfide (Na(SH)) Hydrate; Sodium Hydrogen Sulfide Hydrate, sodiumhydrogensulfide, sodium hydro-sulfide, SODIUM BISULPHIDE, EC 240-778-0, SCHEMBL6248, SODIUM BISULFIDE [MI], GTPL6278, SCHEMBL8425806, SCHEMBL29353883, SCHEMBL30163432, Sodium hydrogen sulfide, anhydrous, SODIUM HYDROSULFIDE [HSDB], NSC158264, AKOS015915184, FS45162, NS00075797, A11479, A810831, Q414203, Sodium hydrosulfide, with <25% water of crystallization, Sodium hydrosulfide, with not <25% water of crystallization, Sodium hydrosulfide, with not <25% water of crystallization [UN2949] [Corrosive], 115694-77-4, Sodium hydrosulfide, with <25% water of crystallization [UN2318] [Spontaneously combustible], 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, Hydrogen sodium sulfide (HNaS), NSC 158264, Sodium bisulfide, Sodium hydrogen sulfide (NaHS), Sodium hydrosulfide (Na(HS)), Sodium mercaptan, Sodium mercaptide, Sodium sulfhydrate, Sodium sulfide (Na(SH)), Sodium bisulfide, Hidrosulfuro sodics [Spanish], Hydrogen sodium sulfide, Hydrogenosulfure de sodium [French], Sodium hydrosulfide, Sodium mercaptan, Sodium mercaptide, Sodium sulfhydrate, Sodium sulfide, Sodium hydrogensulphide, Sodium hydrosulfide solution, Sodium hydrosulfide solution (45% or less), Sodium hydrosulfide, solution, Sodium hydrosulfide, with <25% water of crystallization, Sodium hydrosulfide, with not <25% water of crystallization, [ChemIDplus] UN2949, UN2318 (less than 25% water of crystallization)

Sodium Sulfhydrate is a white to colorless crystals with an odor of hydrogen sulfide.
Sodium Sulfhydrate is highly hygroscopic.
Solution of Sodium Sulfhydrate is light yellow to red with an odor of rotten eggs.

Sodium Sulfhydrate is a white or yellow crystalline solid with an odor of rotten eggs.
Sodium Sulfhydrate, commonly known as NaHS, is a chemical compound primarily available in solid form.
Sodium Sulfhydrate appears as a pale yellow solid with a distinct sulfur-like odor.

Sodium Sulfhydrate is the chemical compound with the formula NaSH.
Sodium Sulfhydrate is the product of the half-neutralization of hydrogen sulfide (H2S) with sodium hydroxide (NaOH).
Sodium Sulfhydrate and sodium sulfide are used industrially, often for similar purposes.

Solid Sodium Sulfhydrate is colorless.
Sodium Sulfhydrate has an odor of H2S owing to hydrolysis by atmospheric moisture.
In contrast with sodium sulfide (Na2S), which is insoluble in organic solvents, Sodium Sulfhydrate, being a 1:1 electrolyte, is more soluble.

Sodium Sulfhydrate is a colorless to light yellow crystalline solid or fused mass.
Sodium Sulfhydrate, solution appears as a colorless to light-yellow liquid.
Sodium Sulfhydrate (NaSH) is an economical form of reactive sulfur that is typically a light-yellow colored solution.

Sodium Sulfhydrate is mildly corrosive to carbon steel and cast iron.
Stainless steels are very resistant to corrosion.
Copper and Sodium Sulfhydrate's alloys, aluminum and zinc are rapidly attacked.

Polyvinyl chloride (PVC) storage systems are to be avoided.
Sodium Sulfhydrate results from the chemical reaction between hydrogen sulphide H2S and caustic soda.

Sodium Sulfhydrate is commonly shipped in tank trucks, tank cars, and oceangoing vessels.
Sodium Sulfhydrate is an economical form of reactive sulfur that is typically a light-yellow colored solution with the accompanying odor of rotten eggs.

USES and APPLICATIONS of SODIUM SULFHYDRATE:
Sodium Sulfhydrate is used to dehair hides and to produce heavy water, paper, rayon, dyes, and other chemical products.
Sodium Sulfhydrate is also used in paints, lacquers, varnishes, textiles, effluent treatment, water purification, and cosmetics.

Sodium Sulfhydrate is also used as a corrosion inhibitor and coloring, complexing, and reducing agent.
Sodium Sulfhydrate is used as a flotation agent in ore processing.
Sodium Sulfhydrate (NaHS) is an inorganic compound characterized by its formation of a hydrosulfide ion (HS⁻) and sodium cation (Na⁺).

Sodium Sulfhydrate typically appears as a white to yellowish solid, often with a strong, unpleasant odor reminiscent of rotten eggs due to the release of hydrogen sulfide (H₂S) upon decomposition.
Sodium Sulfhydrate is highly soluble in water, where it dissociates to release hydrosulfide ions, making it a strong reducing agent.

Sodium Sulfhydrate is commonly used in various industrial applications, including the production of sulfide minerals, in the paper and pulp industry for delignification, and in the textile industry for dyeing processes.
Additionally, Sodium Sulfhydrate plays a role in wastewater treatment and as a reagent in organic synthesis.

Sodium Sulfhydrate is used dye industry for the synthesis of organic intermediates and the preparation of various sulfur dyes.
Leather industry, Sodium Sulfhydrate is used for depilation and tanning of hides, and also for wastewater treatment.
The chemical fertilizer industry, Sodium Sulfhydrate 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, Sodium Sulfhydrate is largely used for mineral processing of copper ores.
Sodium Sulfhydrate is used in the production of man-made fibers for sulfite dyeing and other aspects.

Sodium Sulfhydrate is an important sulfur compound primarily used as a reducing agent and a sulfur source in various chemical reactions.
Sodium Sulfhydrate is highly soluble in water, forming an alkaline solution that is widely utilized in the leather industry for tanning processes.

Additionally, Sodium Sulfhydrate is employed in the production of dyes, flotation agents, and other chemicals.
In scientific research, Sodium Sulfhydrate finds applications in studies involving sulfur chemistry, synthesis of organic compounds, and as a precursor for generating hydrogen sulfide (H2S) gas.

This versatile chemical, Sodium Sulfhydrate, finds applications in various industries, including mining, leather and textile processing, wastewater treatment, and chemical synthesis.
Sodium Sulfhydrate serves as a reagent, reducing agent, and sulfurating agent in different chemical processes, contributing to the production of a wide range of products.

Sodium Sulfhydrate plays a crucial role in these industries due to its unique properties and applications.
Sodium Sulfhydrate is used as a reactive form of sulfur and acts as an intermediate in the production of other chemicals, including thio-chemicals used in textile processing, in the production of flame retardant resins, and in vulcanization accelerators.

Sodium Sulfhydrate is also used as a processing aid in the production of a variety of industrial products.
Sodium Sulfhydrate is a de-hairing agent in the production of fine leathers.
In mining, Sodium Sulfhydrate is a flotation agent, helpful in the precipitation of metals from ore slurries.

Sodium Sulfhydrate is also valuable as a raw material in the production of heat-resistant plastics for the auto and electronic industries.
In paper making, Sodium Sulfhydrate is used to add sulfidity to cooking liquor in kraft pulp mills.
Sodium Sulfhydrate is used as an intermediate for various organic products and an adjuvant for sulfur dyes.

Sodium Sulfhydrate is also used for leather hair removal, desulfurization of mucus filaments, and production of chemical fertilizers and pesticides.
Thousands of tons of Sodium Sulfhydrate are produced annually.

Sodium Sulfhydrate's main uses are in cloth and paper manufacture as a makeup chemical for sulfur used in the kraft process, as a flotation agent in copper mining where it is used to activate oxide mineral species, and in the leather industry for the removal of hair from hides.
Chemical Intermediate uses of Sodium Sulfhydrate: Production of thio-based chemicals, flame-retardant resins, vulcanization accelerators.

Sodium Sulfhydrate is used in textiles (de-hairing of hides), leather processing, and as raw material in polymer production
Mining Industry: Sodium Sulfhydrate acts as a flotation agent to precipitate metals from ore slurries
Pulp & Paper: Sodium Sulfhydrate adds sulfidity in kraft pulp mills during kraft cooking process

Water Treatment: Sodium Sulfhydrate is used for metal precipitation and wastewater processing
Other: Sodium Sulfhydrate is utilized in viscose rayon and cellophane manufacture to remove sulfur compounds
Sodium Sulfhydrate is used in paper pulping, manufacturing dyes, and dehairing hides.

WHAT SODIUM SULFHYDRATE’S USED FOR:
Sodium Sulfhydrate, also known as NaHS, is a key component in a variety of industrial applications that cover a wide array of end markets from leather tanning, pulp and paper, chemical, dye, environmental, emissions reduction, and mineral extraction.
One of its primary uses is as a flotation reagent in the copper mining process where Sodium Sulfhydrate is used to activate oxide mineral species, which helps separate copper and molybdenum during the production process.

PHYSICAL AND CHEMICAL PROPERTIES OF SODIUM SULFHYDRATE:
Sodium Sulfhydrate is a colorless needle-like crystal, easy to deliquescence.
Industrial products of Sodium Sulfhydrate are generally solution, orange or yellow.
The solubility of Sodium Sulfhydrate is soluble in water and alcohol, and the aqueous solution is strongly alkaline.

Melting point of Sodium Sulfhydrate is 55°C
Flash point of Sodium Sulfhydrate is 90°C
Water-soluble of Sodium Sulfhydrate is 620g/L (20°C)

KEY BENEFITS & CHARACTERISTICS OF SODIUM SULFHYDRATE:
*High Reactivity:
Sodium Sulfhydrate offers a reactive sulfur source for multiple industrial syntheses.

*pH Adjustor:
Strongly alkaline—can modify system pH when needed.

*Versatile Utility:
Found in industries ranging from textiles and mining to plastics and pulp.

*Effective Precipitant:
Sodium Sulfhydrate is suitable for metal ion and sulfidity control in processing environments.

NATURE OF SODIUM SULFHYDRATE:
Sodium Sulfhydrate is a colorless needle Crystal, easy deliquescence.
Hydrogen sulfide is released at the melting point.
Sodium Sulfhydrate is soluble in water and alcohol.

The aqueous solution is strongly alkaline.
Sodium Sulfhydrate decomposes with acid to generate hydrogen sulfide.
Industrial products are generally solution, orange or yellow, bitter taste.

PREPARATION METHOD OF SODIUM SULFHYDRATE:
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 Sulfhydrate.

THE MECHANISM OF ACTION OF SODIUM SULFHYDRATE:
The mechanism of action of Sodium Sulfhydrate primarily revolves around its ability to release hydrogen sulfide (H2S) when dissolved in water.
H2S is a gas that can act as a reducing agent and participate in various chemical reactions.

Sodium Sulfhydrate provides a convenient and controllable source of H2S, allowing researchers to study its effects on biological systems, signaling pathways, and physiological processes.
Sodium Sulfhydrate is an H2S donor used in cellular and whole animal experimental systems.

STRUCTURE AND PROPERTIES OF SODIUM SULFHYDRATE:
Crystalline Sodium Sulfhydrate undergoes two phase transitions.
At temperatures above 360 K, Sodium Sulfhydrate adopts the NaCl structure, which implies that the HS− behaves as a spherical anion owing to its rapid rotation, leading to equal occupancy of eight equivalent positions.

Below 360 K, a rhombohedral structure forms, and the HS− sweeps out a discoidal shape.
Below 114 K, the structure becomes monoclinic.
The analogous rubidium and potassium compounds behave similarly.

Sodium Sulfhydrate has a relatively low melting point of 350 °C.
In addition to the aforementioned anhydrous forms, it can be obtained as two different hydrates, Sodium Sulfhydrate•2H2O and Sodium Sulfhydrate•3H2O.

These three species are all colorless and behave similarly, but not identically.
It can be used to precipitate other metal hydrosulfides, by treatment of aqueous solutions of their salts with Sodium Sulfhydrate.
Sodium Sulfhydrate is analogous to sodium hydroxide, and is a strong base.

PREPARATION OF SODIUM SULFHYDRATE:
One laboratory synthesis entails treatment of sodium ethoxide (NaOEt) with hydrogen sulfide:
NaOCH2CH3 + H2S → Sodium Sulfhydrate + CH3CH2OH
An alternative method involves reaction of sodium with hydrogen sulfide.

PHYSICAL and CHEMICAL PROPERTIES of SODIUM SULFHYDRATE:
Chemical formula: NaSH
Molar mass: 56.063 g/mol
Appearance: off-white solid, deliquescent
Density: 1.79 g/cm3
Melting point: 350.1 °C (662.2 °F; 623.2 K) (anhydrous)
Melting point (dihydrate): 55 °C
Melting point (trihydrate): 22 °C
Solubility in water: 50 g/100 mL (22 °C)
Solubility: Soluble in alcohol, ether
Structure Crystal structure: rhombohedral
Chemical Name: Sodium Hydrosulfide

Chemical Formula: NaHS
CAS Number: 16721-80-5
EC Number: 240-778-0
PubChem CID: 28015
Appearance Solid: Off-white, deliquescent (anhydrous)
Appearance Aqueous Solution: Yellow to green, with a characteristic rotten-egg odor due to H₂S gas
Molar Mass: ~56.06 g/mol
Density Solid: ~1.79 g/cm³
Solution Specific Gravity: ~1.15–1.30 g/mL (20–45 % solutions)

Melting Points Solid (anhydrous): ~350.1 °C
Melting Points Hydrates: ~55 °C (dihydrate), ~22 °C (trihydrate)
Boiling Point (Solution): ~122–132 °C (253–269 °F)
pH of Solutions: Highly alkaline; typically 11.5–12.5
Odor: Strong sulfurous, rotten-egg smell from liberated H₂S gas in solution or due to hydrolysis
Formula: NaHS
CAS / EC Number: 16721-80-5 / 240-778-0
Appearance: Off-white solid; yellow-green alkaline solution

Odor: Strong rotten-egg (H₂S)
Melting / Boiling (liq.): ~350 °C (solid); ~122–132 °C (solution)
Solubility: Water, alcohol, ether
pH: ~11.5–12.5 (alkaline)
Main Uses: Chemicals, textiles, mining, pulp, water treatment
Molecular Weight: 56.07 g/mol
Hydrogen Bond Donor Count: 1
Hydrogen Bond Acceptor Count: 1
Rotatable Bond Count: 0

Exact Mass: 55.96966549 Da
Monoisotopic Mass: 55.96966549 Da
Topological Polar Surface Area: 1 Å²
Heavy Atom Count: 2
Formal Charge: 0
Complexity: 2
Isotope Atom Count: 0
Defined Atom Stereocenter Count: 0
Undefined Atom Stereocenter Count: 0
Defined Bond Stereocenter Count: 0
Undefined Bond Stereocenter Count: 0

Covalently-Bonded Unit Count: 2
Compound Is Canonicalized: Yes
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

FIRST AID MEASURES of SODIUM SULFHYDRATE:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation:
Fresh air.
*In case of skin contact:
Take off immediately all contaminated clothing.
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact:
Rinse out with plenty of water.
Call in ophthalmologist.
Remove contact lenses.
*If swallowed:
After swallowing:
Immediately make victim drink water (two glasses at most).
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of SODIUM SULFHYDRATE:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains.
Collect, bind, and pump off spills.
Observe possible material restrictions.
Take up dry.
Dispose of properly.
Clean up affected area.

FIRE FIGHTING MEASURES of SODIUM SULFHYDRATE:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2)
Foam
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of SODIUM SULFHYDRATE:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection.
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of SODIUM SULFHYDRATE:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed.
Dry.

STABILITY and REACTIVITY of SODIUM SULFHYDRATE:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available