Sodium Hydrosulphide (Sodium Hydrosulfide)
SPECIFICATION
|
Item |
Index |
|
NaHS(%) |
70% min |
|
Fe |
30 ppm max |
|
Na2S |
3.5%max |
|
Water Insoluble |
0.005%max |
usage
used in mining industry as inhibitor , curing agent , removing agent
used in synthetic organic intermediate and preparation of sulfur dye additives .
Used in textile industry as a bleaching, as a desulfurizing and as a dechlorinating agent
used in pulp and paper industry.
used in water treatment as an oxygen scavenger agent.
OTHER USED
♦ In the photographic industry to protect developer solutions from oxidation.
♦ It is used in the production of rubber chemicals and other chemical compounds.
♦ It is use in other applications include ore flotation, oil recovery, food preservative, making dyes, and detergent.
Handling and Storage
A.Precautions for Handling
1.Handling is performed in a well ventilated place.
2.Wear suitable protective equipment.
3.Avoid contact with skin and eyes.
4.Keep away from heat/sparks/open flames/ hot surfaces.
5.Take precautionary measures against static discharges.
B.Precautions for Storage
1.Keep containers tightly closed.
2.Keep containers in a dry, cool and well-ventilated place.
3.Keep away from heat/sparks/open flames/ hot surfaces.
4. Store away from incompatible materials and foodstuff containers.
Physical and chemical properties of sodium hydrosulphide(NAHS)
1. Physical properties
Appearance: Sodium hydrosulfide is usually a white or light yellow crystalline powder. It may also be a colorless to yellow, deliquescent crystal with a hydrogen sulfide odor.
Melting point: The melting point of anhydrous sodium hydrosulfide is 350°C; the melting point of the hydrate is lower, at 52-54°C. However, some data show that the melting point of sodium hydrosulfide is 55°C.
Density: The density of sodium hydrosulfide is 1.79 g/cm³, or 1790 kg/m³.
Solubility: Sodium hydrosulfide is easily soluble in water and alcohol, and its aqueous solution is alkaline. According to some data, the solubility of sodium hydrosulfide in water is 620g/L at 20°C.
2. Chemical properties
Acidity and alkalinity: The aqueous solution of sodium hydrosulfide is alkaline.
Reaction with acid: Sodium hydrosulfide releases hydrogen sulfide gas when it meets acid. The reaction equation is: NaHS + H+ → H2S↑ + Na+.
Reaction with sulfur: Sodium hydrosulfide can react with sulfur to form polysulfides, the reaction equation is: 2NaHS + 4S → Na2S4 + H2S.
Reducibility: Sodium hydrosulfide is a commonly used reducing agent that can undergo redox reactions with many oxidants.
3. Other properties
Stability: Sodium hydrosulfide is a stable compound, but it is hygroscopic. At the same time, it is also a flammable solid and may ignite in the air.
Toxicity: Sodium hydrosulfide is toxic to a certain extent and harmful to the human body and the environment. Therefore, special attention should be paid to safety protection during use and storage.
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PACKING
TYPE ONE:25 KG PP BAGS(AVOID RAIN, DAMP AND SUN EXPOSURE DURING TRANSPORTATION.)
TYPE TWO:900/1000 KG TON BAGS(AVOID RAIN, DAMP AND SUN EXPOSURE DURING TRANSPORTATION.)
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