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Sigma-Aldrich

Sodium sulfide nonahydrate

≥99.99% trace metals basis

Synonym(s):

Disodium sulfide nonahydrate, Sodium sulfide enneahydrate

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About This Item

Linear Formula:
Na2S·9H2O
CAS Number:
1313-84-4
Molecular Weight:
240.18
EC Number:
215-211-5
MDL number:
MFCD00149184
UNSPSC Code:
12352300
PubChem Substance ID:
24867038
NACRES:
NA.23

Quality Level

100

assay

≥99.99% trace metals basis

form

crystals and lumps

reaction suitability

reagent type: catalyst
core: sodium

impurities

<100 ppm total metallic impurities

anion traces

SO32- and S2O32-: ≤0.1%

cation traces

Fe:, passes test
NH4+: ≤0.005%

storage temp.

2-8°C

SMILES string

O.O.O.O.O.O.O.O.O.[Na]S[Na]

InChI

1S/2Na.9H2O.S/h;;9*1H2;

InChI key

UIINQVYGFKNSPA-UHFFFAOYSA-N

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General description

Sodium sulfide nonahydrate is a chemical compound with the formula Na2S-H2O. It is a white to yellow hygroscopic solid that is highly soluble in water and has a strong, unpleasant odor. Sodium sulfide nonahydrate is typically made by dissolving elemental sulfur in a solution of sodium hydroxide, which leads to the formation of sodium sulfide. The nonahydrate form of the compound is formed by adding excess water to the solution, which leads to the formation of a crystalline solid with nine molecules of water per molecule of sodium sulfide. Sodium sulfide nonahydrate is often used as a reducing agent in chemical reactions as well as a flotation agent in the mining industry. It is also used in the production of dyes, pigments, and other chemicals.

Application

Sodium sulfide nonahydrate (Na2S.9H2O) can be reacted with α,ω-dibromo and/or α,ω-dichloroalkane for the synthesis of polyalkylene sulfide. It can be used as a reducing agent for the removal of nitrogen oxide from the exhaust gas. Na2S.9H2O can also be used as an inexpensive sulfur source for the synthesis of heterocyclic thiochromes.

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Danger

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Skin Corr. 1B

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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