Melting point :950 °C(lit.)
Density :1.86 g/mL at 25 °C(lit.)
storage temp. :Refrigerator (+4°C)
solubility :H₂O: 0.1 g/mL, clear, colorless
form :flakes
Specific Gravity :1.856
color :Yellow
Water Solubility :186 g/L (20 ºC)
Sensitive :Hygroscopic
Crystal Structure :Reverse CaF2 type
crystal system :Cube
Merck :14,8681
Space group :Fm3m
Lattice constant :

a/nm	b/nm	c/nm	α/o	β/o	γ/o	V/nm3
0.654	0.654	0.654	90	90	90	0.2797

Dielectric constant :5.0（Ambient）
Stability :Spontaneously flammable. Incompatible with acids, metals, oxidizing agents. Contact with acid liberates toxic gas. Fine dust/air mixtures are explosive. Hygroscopic.
InChIKey :CXPWOVUZRAFMDA-UHFFFAOYSA-N
CAS DataBase Reference :1313-82-2(CAS DataBase Reference)
NIST Chemistry Reference :Sodium sulfide(1313-82-2)
EPA Substance Registry System :Sodium sulfide (1313-82-2)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H251 Self-heating; may catch fire Self-heating substances and mixtures Category 1 Danger H290 May be corrosive to metals Corrosive to Metals Category 1 Warning P234, P390, P404 H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501 H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P235 Keep cool. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P280 Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.