Name | Sodium sulfide |
Synonyms | Na2-S Hesthsulphid Sodium sulfide Disodium sulfide Sodium monosulfide Disodium monosulfide Sodium sulfide (Na2S) Sodium sulfide (industrial) |
CAS | 1313-82-2 |
EINECS | 215-211-5 |
InChI | InChI=1/2Na.S/rNa2S/c1-3-2 |
Molecular Formula | Na2S |
Molar Mass | 78.0445 |
Melting Point | 950℃ |
Water Solubility | 186 g/L (20℃) |
Physical and Chemical Properties | density 1.86 |
Use | Used in the manufacture of dyes, sulfides, and used as ore flotation agent, hide depilatory agent, paper cooking agent |
Hazard Symbols | C - Corrosive N - Dangerous for the environment |
Risk Codes | R31 - Contact with acids liberates toxic gas R34 - Causes burns R50 - Very Toxic to aquatic organisms |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
UN IDs | UN 1385 |
The anhydrous substance is a white crystal, easily deliquescent, and has a solubility in water (15. 4G/lOOmL water at 10 ° C. And 57. 2G/lOOmL water at 90 ° C.). When it reacts with acid, hydrogen sulfide is generated. Slightly soluble in alcohol, insoluble in ether. The aqueous solution is strongly alkaline, so it is also called sulfide alkali. Dissolved in sulfur generated sodium polysulfide. Industrial products often contain impurities for pink, brown red, yellow block. Corrosive, toxic. In the air oxidation of sodium thiosulfate.
used in the dye industry for the production of sulfur dyes, is the raw material of blue and blue sulfide. The dyeing and printing industry is used as a dye aid for dissolving sulfur dyes. In the leather industry, hydrolysis is used to depilate hides, and sodium polysulfide is also used to prepare sodium polysulfide to accelerate the soaking of dry skins and help softening. The paper industry is used as a cooking agent for paper. The textile industry is a mordant for the denitrification and nitration reduction of man-made fibers and for the dyeing of cotton fabrics. The pharmaceutical industry is used to produce antipyretic drugs such as phenacetin. In addition, it is also used to make sodium thiosulfate, sodium hydrosulfide, sodium polysulfide, etc.
block with a thickness of 0. 5mm or more of the iron drum packaging, iron drum should be sealed, each net weight 150kg, 200kg. Sheet-like and granular products shall be packed with plastic woven bags lined with two-layer polyethylene plastic bags. The inner bags shall be tightly heat-sealed, with a net weight of 50kg or 25kg per bag. The package should be marked with "drugs" and "corrosive substances. Belongs to the inorganic alkaline corrosion articles, risk code number: GB 8.2 class 82011 (containing crystal water is greater than or equal to 30%). UNNo.1849;IMDG CODE page 8227. Class 8.2 (anhydrous or water of crystallization ≤ 30%) GB 4.2 class 42009.
UN No.1385; IMDG CODE P. 4263, category 4.2. A ventilated, dry place or under an asbestos shed shall be placed. Rain and moisture should be prevented. This product is deliquescent, and easy to oxidize, the container must be sealed, can not be mixed with acid and corrosive goods storage. When loading and unloading should be light to prevent packaging damage. When there is a fire, it can be suppressed by water and sand. Sodium sulfide is highly corrosive to the skin, and the skin of the hands of the workers exposed to sodium sulfide solution is cracked and red. Attention should be paid during operation. Touch the skin, can be washed with water. Sodium sulfide droplets or small pieces into the eye immediately washed with water after 15min, sent to the hospital for treatment. To protect the skin, it is recommended to often wipe the hands with a weak solution of acetic acid, followed by an oily ointment. Pay attention to protect eyes.