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Sulfates and sulfur salts

Sodium polysulfide

Also known as Sodium sulfide (Na2(Sx)), Sodium trisulfide, Sodium sesquisulfide

CAS 1344-08-7Formula Na2S3Molar mass 142.18 g/molEC 215-686-9
GHS signal word: Danger. Pictograms: Corrosive, Acute toxicity (severe), Hazardous to the environment 4 suppliers listed
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Sodium polysulfide chemical structure, Na2S3, CAS 1344-08-7
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1344-08-7
Formula
Na2S3
Molar mass
142.18 g/mol
Physical form
Liquid
HS code
283010
Category
Sulfates and sulfur salts
Illustrative photo, closed amber glass reagent bottles on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Sodium polysulfide?

Plain description, key identifiers and synonyms

Sodium polysulfide is a chemical substance with the molecular formula Na2S3 and a molar mass of 142.18 g/mol. Its CAS registry number is 1344-08-7.

Identifiers

Registry numbers, names and line notations, tap to copy

CAS number
1344-08-7 CAS number cross-checkedOther or deprecated CAS: 37488-76-9
EC number
215-686-9
Molecular formula
Na2S3
UNII
3GC5GB3QBV
InChIKey
OLPXIHXXKBDZES-UHFFFAOYSA-L
InChI
InChI=1S/2Na.H2S3/c;;1-3-2/h;;1-2H/q2*+1;/p-2
SMILES (canonical and isomeric)
[Na+].[Na+].[S-]S[S-]

Synonyms

  • Sodium sulfide (Na2(Sx))
  • Sodium trisulfide
  • Sodium sesquisulfide
  • Sodium sulfide (Na2(S3))
  • Trisulfide, sodium salt (1:2)

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Liquidexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
142.18 g/molcalc.
Exact mass
141.8958 Dacalc.
LogP (octanol/water)
-5.35calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
0calc.
Heavy atoms
5calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS05: Corrosive
Corrosive
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H301Toxic if swallowed.
  • H314Causes severe skin burns and eye damage.
  • H400Very toxic to aquatic life.
Precautionary statements (17)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P363Wash contaminated clothing before reuse.
  • P391Collect spillage.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Sodium polysulfide suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

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Where suppliers are based

4 suppliers in 3 countries

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Sodium polysulfide price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Industrial uses: Intermediate, Reducing agent, Corrosion inhibitor.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 016-010-00-3

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Sodium polysulfide is traded under.

HS 2830.10Indicative HS code

Sodium sulphides

World exports in 2024
$237M
−12.7% vs 2023, imports $277M
2019 to 2024
Top exporters
  1. China69.0%
  2. United States20.2%
  3. Germany5.0%
Top importers
  1. Peru18.6%
  2. Chile13.6%
  3. DR Congo * partner reported12.8%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Sodium polysulfide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Sodium polysulfide, based on the data on this page

What is Sodium polysulfide?

Sodium polysulfide is a chemical substance with the molecular formula Na2S3 and a molar mass of 142.18 g/mol. Its CAS registry number is 1344-08-7.

What is the CAS number of Sodium polysulfide?

The CAS registry number of Sodium polysulfide is 1344-08-7. Other or deprecated CAS numbers: 37488-76-9.

What is the molecular formula and weight of Sodium polysulfide?

The molecular formula of Sodium polysulfide is Na2S3 and its molar mass is 142.18 g/mol.

What is Sodium polysulfide used for?

Industrial uses: Intermediate, Reducing agent, Corrosion inhibitor.

Is Sodium polysulfide hazardous?

Sodium polysulfide carries the GHS signal word "Danger". Main hazards: toxic if swallowed, causes severe skin burns and eye damage, very toxic to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Sodium polysulfide?

Sodium polysulfide is usually classified under HS code 283010 (Sodium sulphides). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Sodium polysulfide?

CompoundList lists 4 suppliers of Sodium polysulfide in United States, Belgium and China. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Sodium polysulfide?

Suppliers quote Sodium polysulfide on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Sodium polysulfide

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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