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Sulfates and sulfur salts

Selenium disulfide

Also known as Selenium disulphide, Selenium(IV) disulfide, Selsun Blue

CAS 7488-56-4Formula S2SeMolar mass 143.09 g/molEC 231-303-8
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Serious health hazard, Hazardous to the environment 19 suppliers listed Drug substance
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Selenium disulfide chemical structure, S2Se, CAS 7488-56-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Red-yellow crystals
Melting point
<100
Boiling point
Decomposes
Solubility
Practically insoluble in water and organic solvents
HS code
285390
Category
Sulfates and sulfur salts
UN number
UN 2657
Illustrative photo, red pigment powder in an open fibre drum in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Selenium disulfide?

Plain description, key identifiers and synonyms

Selenium sulfide is a sulfide salt.

Identifiers

Registry numbers, names and line notations, tap to copy

CAS number
7488-56-4 CAS number cross-checked
EC number
231-303-8
Molecular formula
S2Se
UNII
Z69D9E381Q
MDL number
MFCD00011227
INCI name
SELENIUM SULFIDE
InChIKey
JNMWHTHYDQTDQZ-UHFFFAOYSA-N
InChI
InChI=1S/S2Se/c1-3-2
SMILES (canonical and isomeric)
S=[Se]=S

Synonyms

  • Selenium disulphide
  • Selenium(IV) disulfide
  • Selsun Blue
  • Exsel
  • Selsun
  • Lenium
  • Sebusan
  • Seleen
  • Selenex
  • Selenix
  • Selukos
  • Zeran
  • Sulfur selenide
  • Selenium sulfide (SeS2)
  • Selenium(IV) sulfide
  • Sul-Blue
  • Sel-O-Rinse
  • Selen(IV) sulfid
  • Tersi
  • Selenium sulfide SeS2
  • RCRA waste number U205
  • Seledruff
  • Selenium sulfide
  • Selenium(IV) Disulfide (1:2)
  • RCRA waste no. U205
Show all 37 synonyms
  • Selenium sulfide, micronized
  • Selenium sulphide, micronized
  • Selenium(IV) sulphide
  • Selenium(IV) disulphide
  • Selenium sulfide (USP)
  • Selenium sulphide (ses2)
  • Selenium sulfide (ses(sub 2))
  • Selendisulfid
  • Selenii disulfidum
  • S2Se
  • Exsel (TN)
  • selenium (IV) sulfide

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

Appearance
Red-yellow crystalsexp.
Melting point
<100exp.
Boiling point
Decomposesexp.
Solubility
Practically insoluble in water and organic solventsexp.

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
143.09 g/molcalc.
Exact mass
143.8607 Dacalc.
LogP (octanol/water)
0.92calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H300Fatal if swallowed.
  • H301 + H331Toxic if swallowed. Toxic if inhaled.
  • H301Toxic if swallowed.
  • H330Fatal if inhaled.
  • H331Toxic if inhaled.
  • H373May cause damage to organs through prolonged or repeated exposure.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (18)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P273Avoid release to the environment.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P316Get emergency medical help immediately.
  • P319Get medical help if you feel unwell.
  • P320Specific treatment is urgent (see supplemental first aid instructions on the label).
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P391Collect spillage.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2657
Transport hazard class
6.1
Packing group
II

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

Selenium disulfide suppliers

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

All 19 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

19 suppliers in 4 countries

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Selenium disulfide price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Manufacture of glass, photoelectric cells.

Veterinary medication:.

Use classes: Cosmetics, Animal Drugs.

Cosmetic ingredient, INCI name SELENIUM SULFIDE(anti-seborrheic, hair conditioning)

Roles

  • antifungal agent
  • antimicrobial agent
  • dermatologic drug
  • pharmaceutical

Functional uses

  • Anti-dandruff
  • Softener and conditioner

Cosmetic functions

  • Anti-seborrheic
  • Hair conditioning

How it is made

Preparation from selenious acid and H2S, product may be a mixture of the elements. ... Prepared by fusion of the elements, solid solutions of sulfur (S8), selenium (Se8) and selenium sulfides (S n Se8-n, n = 1-7) formed. (Selenium sulfides)

Selenium disulfide is formed by reaction of hydrogen sulfide with selenous acid or by direct combination of the elements.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory
  • EU Cosmetics Regulation Annex III, restricted in cosmetics
    Name: Selenium disulphide, Ref no: 49, Annex ref: III/49
  • Active ingredient in FDA approved drug labels

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 Selenium disulfide is traded under.

HS 2853.90Indicative HS code

Phosphides, whether or not chemically defined, excluding ferrophosphorus, other, other

World exports in 2024
$2.45B
−33.6% vs 2023, imports $816M
2019 to 2024
Top exporters
  1. China68.4%
  2. Israel8.1%
  3. United States4.9%
Top importers
  1. United States19.3%
  2. Japan17.9%
  3. China13.4%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Selenium disulfide is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Selenium disulfide, based on the data on this page

What is Selenium disulfide?

Selenium sulfide is a sulfide salt.

What is the CAS number of Selenium disulfide?

The CAS registry number of Selenium disulfide is 7488-56-4.

What is the molecular formula and weight of Selenium disulfide?

The molecular formula of Selenium disulfide is S2Se and its molar mass is 143.09 g/mol.

What is Selenium disulfide used for?

Manufacture of glass, photoelectric cells. Veterinary medication:. Use classes: Cosmetics, Animal Drugs.

Is Selenium disulfide hazardous?

Selenium disulfide carries the GHS signal word "Danger". Main hazards: fatal if swallowed, toxic if swallowed. toxic if inhaled, toxic if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Selenium disulfide?

Selenium disulfide is usually classified under HS code 285390 (Phosphides, whether or not chemically defined, excluding ferrophosphorus, other…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Selenium disulfide?

CompoundList lists 19 suppliers of Selenium disulfide in United States, China, India and United Kingdom. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Selenium disulfide in India?

4 suppliers in India list Selenium disulfide on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Selenium disulfide?

Suppliers quote Selenium disulfide 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 Selenium disulfide

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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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