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

Diantimony trisulfide CAS 1345-04-6 serves as a high-performance friction modifier and vulcanizing agent in North American heavy-duty metallurgy applications, where its thermal stability is critical for the production of brake linings and specialized alloys used in the U.S. aerospace and defense sectors. The American m...

Antimony Sulfide Specifications

CAS Number
1345-04-6
Molecular Formula
S3Sb2
IUPAC NameORBotanical Name
sulfanylidene(sulfanylidenestibanylsulfanyl)stibane
Canonical SMILES
S=[Sb]S[Sb]=S
InChI Key
IHBMMJGTJFPEQY-UHFFFAOYSA-N
InChI
1S/3S.2Sb
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 (evaluation) · 1 MT (commercial)

Lead Time

3 – 5 weeks estimated

Delivery Terms

FOB*

Packaging

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

US Availability

US Facility Inventory

Documentation

US SDS · COA · TDS · Specification sheet

US Regulatory & Quality Information

TSCA status*

US SDS / HazCom*

GHS classification*

ISO 9001:2015 site*

DOT shipping classification*

FDA status*

EPA status*

California Prop 65*

Reliable US supply chain

Regulatory compliance

On-time delivery

Technical expert support

Rounded Top

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