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Hydrosulphite of sodium

Sodium Hydrosulphite

The sodium hydrosulfide is a colorless or white hygroscopic crystals very soluble in water. Crystalline forms. Is weak hydrolysis of salt — acidic salt of sodium and hydrogen sulfide. Melts without decomposition, the molten sodium hydrosulfide is black. A typical reducing agent, is oxidized by atmospheric oxygen.
The density of 1.79 g/cm3. The melting point of 350° C.
The sodium hydrosulfide (sulfhydrate sodium, sodium-sulfur, sour bisulfide sodium) is prepared by absorption of hydrogen sulfide gas (waste in various industries — disulphide, 2-mercaptobenzthiazole) sodium hydroxide solution.

Chemical formula: NaHS

Sulfhydrate marriagerelated sodium used mainly in nonferrous metallurgy for the enrichment of ores of non-ferrous metals by flotation. In flotation, it is the reagent controller at enrichment of copper, lead, zinc, molybdenum and armaniseries ores.
In leather industry it is used as a component of the composition to remove the outer layer of skin.
It is also used as a raw material in the chemical industry (for production of ethyl mercaptan, butifos, dyes).
In the textile industry it is used in the production of artificial silk. Also, the sodium hydrosulfide is a bleach for cotton, linen, rayon and nylon.

Hydrosulfide sodium hydrosulfite is available in loose form (flaked) and in the form of a solution.

Physico-chemical characteristics of technical sodium hydrosulfide
Name of indicators Norma
The appearance of the Scales from yellow to dark brown
Mass fraction of sodium hydrosulfide (NaHS), %, not less than 70.0
Mass fraction of sodium sulfide (sodium sulfide) (Na2S), %, not more than 3.0
Mass fraction of iron (Fe), %, not more 0,0008

Security requirements of sodium hydrosulfide
Hazard class
The degree of toxicity 4

The basic properties and hazards of
The main properties of the Scales from yellow to dark brown. TPL. 350° C; soluble in water (43% by mass at 20° C) alcohol; emit hydrogen sulfide (H2S) when heated, in contact with water, the action of acids; reducing agents.
The solution is clear or turbid, yellow to brown color, small amount of precipitation. Upon cooling of a solution of sodium hydrosulfide below 22° C precipitate, soluble when heated.
Explosion and fire hazard Fire - and explosion. Non-flammable. Containers may explode when heated.
Hazard to humans by inhalation (cough, chest tightness, runny nose, watery eyes); skin (skin burns); eye (swelling of the eyelids, sudden reddening of the conjunctiva, iris lesions). A chemical burn.
The danger of sodium hydrosulfide is caused by the possibility of separating from a solution of hydrogen sulfide during prolonged storage or high temperature.
At concentrations above the maximum allowable limit, hydrogen sulfide is irritating to the eyes and respiratory tract, may cause respiratory arrest. Inhalation 1 mg/l and above poisoning may develop almost immediately: convulsions and loss of consciousness lead to death.
Personal protective equipment For Hematide and works Manager — remote-3 (for 20 minutes). For emergency responders — insulating protective suit FIR 5 complete with an insulating mask IP-4M or breathing apparatus ASV-2. In the absence of the samples combined-arms protective suit L-1 or L-2, complete with industrial gas masks with cartridges In the aerosol filter, BKF, CD KD8.
At low concentrations in air (in excess of the MPC 100 times) — overalls, industrial gas mask small dimension of PFM-1 universal protective cartridge ROM, Autonomous protective individual set of forced flow in the breathing zone of purified air. Oil-resistant gloves, gloves of dispersion of butyl rubber, special shoes.
Overalls, respirators, goggles, gloves, protective ointments, pastes, silicone cream, mask with box brand BKF. It is necessary to observe rules of personal hygiene, after work to take a shower.
Necessary actions in emergency situations
Of a General nature to Take the car to a safe place. Isolate the dangerous zone in radius of not less than 100 m to Adjust the specified distance according to the results of Hematide. To remove strangers. A dangerous area to enter the protective equipment. The victims first aid.
In case of leakage, spills and placer to Inform the TSSEN. Do not touch spilled material. To fix the leak with safety precautions. To pump the contents in good, dry, corrosion-protected container or into a drainage container under the conditions of mixing of liquids. The Straits to protect the earthen wall, fill with inert material, collect in a corrosion-protected tank.
When fire is Not lit. Keep containers cool with water from maximum distance.
Neutralization To precipitate (the dispersion, insulation) fumes use water spray. Substance to drain from the sink area with the usual precautions. The place of the spill to isolate sand, rinse with plenty of water and prevent the ingress of substances into surface waters. The washed surface of the rolling stock, areas treated with a weak acid solution.
First aid measures first aid Call an ambulance. Persons providing first aid must use PPE respiratory system and skin. Fresh air, rest, warmth, clean clothes. In a nose drip oil. Drinking vegetable oil SIPS. The eyes and skin rinse thoroughly with water.
The sodium hydrosulfide is fire - and explosion-proof, the degree of impact on the body relates to the substances of the 4th class of danger.

Packaging, transportation and storage.
The sodium hydrosulfide is Packed in polypropylene bags weighing 25 kg.
The sodium hydrosulfide transporterowych carload shipments by rail or small shipments by road and river modes of transport in covered vehicles.
The sodium hydrosulfide is stored in closed dry storage spaces on wooden shelves or pallets at a relative humidity of not more than 70%. Perhaps the release from a solution of sodium hydrosulfide and hydrogen sulfide, therefore, unacceptable storage of sodium hydrosulfide in conjunction with the liquids, especially acids.
The warranty storage period is 1 year from the date of manufacture.

Uzbekistan
  • Uzbekistan, 100021, Tashkent, Shayhontohur, Furqat str., bld. 6A.
  • +998 (71) 203-50-00
    +998 (71) 203-00-55
  • info@meritkimyo.uz
Kazakhstan
  • Kazakhstan, Almaty, Krasnogvardeysky
    tract 419.
  • +7 (727) 224-47-47
    +7 (771) 171-71-38
  • info@meritchemicals.com