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Antimony Sulfide

Antimony Sulfide

CAS Number: 1345-04-6

Molecular Formula: S3Sb2

Flame Retardant SynergistNatural Grade (Stibnite mineral, 60–70% Sb)Refined Powder (≥ 99% Sb₂S₃)REACH EU Registered

About Antimony Sulfide

Antimony Trisulfide or Antimony (III) Sulfide (Sb2S3) is an inorganic flame retardant synergist preferably used in halogenated polymer systems such as PVC and ABS needs. Antimony sulfide (Sb2S3) strengthens the thermal stability of plastics and reduces flammability by promoting char formation and slowing combustion. Al...

Antimony Sulfide Specifications

CAS Number
1345-04-6
Molecular Formula
S3Sb2
Molecular Weight
339.68 g/mol
IUPAC Name
sulfanylidene(sulfanylidenestibanylsulfanyl)stibane
Canonical SMILES
S=[Sb]S[Sb]=S
InChI Key
IHBMMJGTJFPEQY-UHFFFAOYSA-N
InChI
1S/3S.2Sb
PubChem CID
16685273
EINECS Number
215-713-4
MDL Number
MFCD00011217
HSN No
2830.90
Molecular Weight
339.68 g/mol
Appearance
Gray-black crystalline powder (natural form); red-orange powder (synthetic amorphous form)
Odor
Odorless
Density
4.64 g/cm³
Melting Point
550 °C
Boiling Point
1150 °C
Solubility
Insoluble in water and acids; soluble in hot concentrated HCl Mohs
Hardness
2 (soft mineral)
Sb₂S₃ Content
≥ 99%
Free Sulfur
≤ 0.1%
Arsenic (As)
≤ 0.05%
Lead (Pb)
≤ 0.05%
Iron (Fe)
≤ 0.02%
Moisture
≤ 0.2%
Particle Size
Available from 1 µm to 75 µm depending on use
Physical appearance
Gray-black crystalline powder (natural form); red-orange powder (synthetic amorphous form); yellow to reddish-brown solid; or orange to brown powder to crystal.
GHS Hazard Statements
H302 (70.5%): Acute toxicity, oral H332 (70.5%): Acute toxicity, inhalation H351 (27.3%): Carcinogenicity H373 (27.3%): Specific target organ toxicity, repeated exposure H411 (63.8%): Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes
P210, P261, P264, P270, P271, P273, P280, P301+P312, P304+P340, P312, P330, P370+P378, P391, and P501
Hazard Classes and Categories
Flam. Sol. 1

Polymer Flame Retardancy

Fire resistance in PVC, ABS, and other halogenated plastics

Synergist Additive

Works with halogenated FRs to improve thermal stability and reduce smoke emission

Industrial Specific

Ideal for wire & cable insulation, molded plastics, and thermoplastics

Pyrotechnics & Explosives

Preferred in matches, fireworks, percussion caps, primers Provides fuel and enhances ignition sensitivity

Glass & Ceramics

Decolorizer and opacifier in specialty glass. Preferred in enamels and glazes

Pigments & Paints

Component of red pigments (antimony vermilion

Lubricants & Friction Materials

Brake linings, clutches, friction pads for stability under heat

Semiconductors & Electronics

Infrared detectors, photoconductors, and as a semiconductor material

Semiconductor Material

A semiconductor material used in the manufacturing of photoelectric devices and solar cells

Pyrotechnic Ingredient

A critical component in the production of safety matches, fireworks, and military ammunition primers

Flame Retardant

A synergist used in plastics and textiles to enhance fire resistance

Pigment

A coloring agent used in the manufacture of ruby glass, ceramics, and paints

Friction Material

A lubricant and filler used in the production of brake pads and friction linings

Scintigraphic Mapping Agent

A colloidal form used in clinical imaging for bone marrow and lymphoedema assessment

Temperature

Store in cool, dry, ventilated areas

Safe storage

Avoid heat, sparks, and open flames (powder may ignite) and in sealed containers to prevent contamination

Handling

Handle with gloves, protective clothing, and dust mask

Shelf life

Shelf life: 24 months under proper storage conditions

Antimony Sulfide FAQs

Minimum Order Quantity

25 kg (pilot) · 1 MT (commercial)

Lead Time

3 – 5 weeks ex-works

Incoterms

FOB · CIF

Packaging

20 L pails, 200 L HDPE drums, 1000 L IBC

Regional Availability

India · EU · Middle East · Southeast Asia

Documentation

SDS · COA · TDS available on request

Compliance & Quality

REACH registered*

GHS/SDS available

ISO 9001:2015 site*

RoHS compliant*

Global sourcing network

Consistent quality & reliability

End-to-end technical support

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