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1313-82-2

Basic Information
CAS No.: 1313-82-2
Name: Sodium sulfide
Molecular Structure:
Molecular Structure of 1313-82-2 (Sodium sulfide)
Formula: Na2S
Molecular Weight: 78.04
Synonyms: Sodiumsulfide (Na2S);Disodiummonosulfide;Disodium sulfide;Disodium sulfide (Na2S);NSC 41874;Sodiummonosulfide;Sodium sulphide;
EINECS: 215-211-5
Density: 1.86 g/cm3
Melting Point: 950 ºC
Boiling Point: 174oC
Flash Point:
Solubility: Water solubility: 186 g/L (20 ºC)
Appearance: crystals of varied colour, with a repulsive odour
Hazard Symbols: CorrosiveC,DangerousN
Risk Codes: 31-34-50
Safety: 26-45-61
Transport Information: UN 1849 8/PG 2
PSA: 25.30000
LogP: -0.53540
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    Name Sodium sulfide Molecular Formula Na2S Molecular Weight 78.03 CAS Registry Number 1313-82-2 EINECS

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  • Sodium sulfide

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    1313-82-2

    Sodium sulfide

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  • Casno:

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  • Sodium sulfide CAS 1313-82-2

  • Casno:

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  • Sodium sulfide Anhydrous

  • Casno:

    1313-82-2

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Consensus Reports

Reported in EPA TSCA Inventory.

Standards and Recommendations

DOT Classification:  4.2; Label: Spontaneously Combustible

Specification

Sodium sulfide, its cas register number is 1313-82-2. It also can be called Sodium bichromate; and Disodium monosulfide. Sodium sulfide is the chemical compound with the formula Na2S, or more commonly its hydrate Na2S·9H2O. It is a yellow to red solid; readily soluble in water, slightly soluble in alcohol. It is a strong reducing agent and reacts with oxidants. It is used in the production of rubber chemicals, sulfur dyes and other chemical compounds.

Preparation of Sodium sulfide: Industrially Na2S is produced by reduction of Na2SO4 with carbon, in the form of coal:
Na2SO4 + 4 C → Na2S + 4 CO
In the laboratory, the anhydrous salt can be prepared by reduction of sulfur with sodium in anhydrous ammonia. Alternatively, sulfur can be reduced by sodium in dry THF with a catalytic amount of naphthalene:
2 Na + S → Na2S

Uses of Sodium sulfide: It is primarily used in pulp and paper industry in the kraft process . It is used in water treatment as an oxygen scavenger agent and also as a metals precipitant, in the photographic industry to protect developer solutions from oxidation, in textile industry as a bleaching, as a desulfurising and as a dechlorinating agent and in leather trade for the sulfitisation of tanning extracts. It is used in chemical manufacturing as a sulfonation and sulfomethylation agent. It is used in the production of rubber chemicals, sulfur dyes and other chemical compounds. It is used in other applications including ore flotation, oil recovery, food preservative, making dyes, and detergent. Sodium sulfide is an active ingredient in some over-the-counter ingrown toenail relief products.

When you are using this chemical, please be cautious about it as the following:
1. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice;
2. In case of accident or if you feel unwell, seek medical advice immediately (show label where possible);
3. Avoid release to the environment. Refer to special instructions safety data sheet;

You can still convert the following datas into molecular structure:
(1)InChI=1S/2Na.S;
(2)InChIKey=CXPWOVUZRAFMDA-UHFFFAOYSA-N;
(3)SmilesS([Na])[Na];

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 oral 205mg/kg (205mg/kg)   Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 30(8), Pg. 30, 1986.
rat LD50 intraperitoneal 147mg/kg (147mg/kg)   Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 30(8), Pg. 30, 1986.
rat LD50 oral 208mg/kg (208mg/kg)   Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol.