Sodium hydrosulfide

Not to be confused with sodium hydrosulfite.
Sodium hydrosulfide
Names
IUPAC name
Sodium hydrosulfide
Other names
Sodium bisulfide
Sodium sulfhydrate
Sodium hydrogen sulfide
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.037.056 Edit this at Wikidata
EC Number
  • 240-778-0
RTECS number
  • WE1900000
UNII
UN number 2922 2318
  • InChI=1S/Na.H2S/h;1H2/q+1;/p-1 checkY
    Key: HYHCSLBZRBJJCH-UHFFFAOYSA-M checkY
  • InChI=1/Na.H2S/h;1H2/q+1;/p-1
    Key: HYHCSLBZRBJJCH-REWHXWOFAV
  • [Na+].[SH-]
Properties
NaSH
Molar mass 56.063 g/mol
Appearance off-white solid, deliquescent
Density 1.79 g/cm3
Melting point 350.1 °C (662.2 °F; 623.2 K) (anhydrous)
55 °C (dihydrate)
22 °C (trihydrate)
50 g/100 mL (22 °C)
Solubility Soluble in alcohol, ether
Structure
rhombohedral
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Flammable solid, stench, reacts with acids to release hydrogen sulfide
GHS labelling:
GHS02: FlammableGHS05: CorrosiveGHS06: ToxicGHS09: Environmental hazard
Danger
H226, H251, H290, H301, H314, H400
P210, P233, P234, P235+P410, P240, P241, P242, P243, P260, P264, P270, P273, P280, P301+P310, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P330, P363, P370+P378, P390, P391, P403+P235, P404, P405, P407, P413, P420, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 2: Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur. Flash point between 38 and 93 °C (100 and 200 °F). E.g. diesel fuelInstability (yellow): no hazard codeSpecial hazards (white): no code
3
2
Flash point 90 °C (194 °F; 363 K)
Safety data sheet (SDS) TDC MSDS
Related compounds
Other anions
 Sodium hydroxide
Sodium amide
Other cations
 Ammonium hydrosulfide
Related compounds
 Sodium sulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Sodium hydrosulfide is the chemical compound with the formula NaSH. This compound is the product of the half-neutralization of hydrogen sulfide (H2S) with sodium hydroxide (NaOH). NaSH and sodium sulfide are used industrially, often for similar purposes. Solid NaSH is colorless. The solid has an odor of H2S owing to hydrolysis by atmospheric moisture. In contrast with sodium sulfide (Na2S), which is insoluble in organic solvents, NaSH, being a 1:1 electrolyte, is more soluble.