Melting point :50 °C
Boiling point :920°C
Density :1.427
storage temp. :2-8°C
solubility :Aqueous Acid (Slightly), Water (Sparingly)
form :Solid
color :colorless or slightly yellow
Specific Gravity :1.427
Water Solubility :180 G/L (25 ºC)
Sensitive :Hygroscopic
Merck :14,8681
Stability :Stable. Hygroscopic. Light-sensitive. Flammable. Avoid exposure to air, acids, oxidizers, strong bases, strong reducing agents, most common metals.
InChI :1S/2Na.9H2O.S/h;;9*1H2;
InChIKey :GDQBTRYKLOBMLL-UHFFFAOYSA-N
SMILES :O.O.O.O.O.O.O.O.O.[Na]S[Na]
CAS DataBase Reference :1313-84-4(CAS DataBase Reference)
EPA Substance Registry System :Sodium sulfide (Na2S), nonahydrate (1313-84-4)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H311 Toxic in contact with skin Acute toxicity,dermal Category 3 Danger P280, P302+P352, P312, P322, P361,P363, P405, P501 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 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P260 Do not breathe dust/fume/gas/mist/vapours/spray. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P312 IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. 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.