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Sigma-Aldrich

Sodium sulfide nonahydrate

≥99.99% trace metals basis

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Synonym(s):
Disodium sulfide nonahydrate, Sodium sulfide enneahydrate
Linear Formula:
Na2S·9H2O
CAS Number:
Molecular Weight:
240.18
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.23

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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1 of 4

This Item
208043SX0770407410
Sodium Sulfide, Nonahydrate meets analytical specifications of USP/NF GR ACS

Supelco

SX0770

Sodium Sulfide, Nonahydrate

Sodium sulfide

Sigma-Aldrich

407410

Sodium sulfide

form

crystals and lumps

form

crystals or chunks

form

-

form

solid

impurities

<100 ppm total metallic impurities

impurities

-

impurities

-

impurities

-

anion traces

SO32- and S2O32-: ≤0.1%

anion traces

SO32- and S2O32-: ≤0.1%

anion traces

-

anion traces

-

cation traces

Fe:, passes test, NH4+: ≤0.005%

cation traces

Fe:, passes test, NH4+: ≤0.005%

cation traces

Fe:, passes test, NH4+: ≤0.005%

cation traces

-

Quality Level

100

Quality Level

200

Quality Level

200

Quality Level

200

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.

Signal Word

Danger

Hazard Statements

Hazard Classifications

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

Storage Class Code

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Absorption-reduction technique assisted by ozone injection and sodium sulfide for NOx removal from exhaust gas
Mok YS
Chemical Engineering Journal, 118(1-2), 63-67 (2006)
The reaction products of sulfide and S-nitrosoglutathione are potent vasorelaxants.
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Veinot, J.G.C. et al.
Chemistry of Materials, 9, 2117-2117 (1997)
Convenient one-pot access to 2 H-3-nitrothiochromenes from 2-bromobenzaldehydes, sodium sulfide and beta-nitrostyrenes
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