What Is Antimony Ingot? Uses, Grades and Purchasing Checks

Antimony has the symbol Sb and atomic number 51 and is generally classified as a metalloid. Its metallic form is silvery, hard and brittle. These properties help describe the material; colour or fracture appearance cannot determine whether a shipment meets its specification. Royal Society of Chemistry: antimony

Purchasing documents should state the full product name and form. “Antimony Ingot” and “Antimony Trioxide” refer to different products, requiring their own testing and acceptance criteria.

Stibnite, principally Sb₂S₃, is an important antimony mineral. Commercial ore contains other minerals too, so a mineral's chemical formula must not be treated as the antimony assay of a whole cargo. NTP monograph, page 17

These are inquiry and verification topics, not a universal acceptance standard. A price per tonne is not directly comparable across ore, concentrate and ingot without clarifying payable content, measurement basis, deductions and delivery terms.

A representative metallic-antimony supply chain is:

Ore or concentrate → smelting and refining → antimony ingots → antimony compounds or alloys → industrial applications

This illustrates the division of work, not the only process route. Not every antimony product must first become an ingot: antimony trioxide can also be processed from crude oxide. Feedstock and target product determine the route. NTP, pages 17–18

Ingot buyers may manufacture antimony chemicals or alloys, or trade metals. Buyers requesting the same reference grade can still have different impurity limits, sampling requirements and packaging needs. Explaining the intended use helps suppliers prepare a relevant quotation.

Downstream processing changes more than packaging. Oxides, sulfides, alloys and semiconductors have different compositions and functions; powders, dispersions and masterbatches also impose different processing requirements. The following 10 groups cover traded products and processed forms, not ten mutually exclusive chemical substances.

Chemical products and formulated materials

Sources for ①②: Campine product forms and Nihon Seiko applications; ③: NYACOL pentoxide products; ④: NYACOL glass-fining applications; ⑤: antimony glycolate product information and Nihon Seiko polyester catalysis; ⑥: Nihon Seiko trisulfide information.

Specification discussions should go beyond antimony content. Check active content and carrier for masterbatches, solids content and compatibility for dispersions, process suitability for catalysts, and formulation-specific particle-size requirements for friction additives. These are inquiry topics; the user of the material should define the actual acceptance limits.

Alloys, functional oxides and semiconductor materials

Sources: Royal Society of Chemistry, Waukesha bearing materials, NYACOL doped tin oxide and Hamamatsu FT-NIR / FT-IR detectors.

“ATO” can refer to different materials. In flame retardants it commonly means Antimony Trioxide; in functional coatings it can mean Antimony-doped Tin Oxide. State the full name, composition and use when making an inquiry.

Semiconductor applications require dedicated controls for purity, impurities, crystal growth and device performance. An ordinary industrial ingot grade is not a semiconductor-grade specification, and does not establish that a particular lot is suitable for chip or infrared-device production.

Connect the final product, the antimony-containing material and its function in the process. These examples cover established industrial uses and specialist material systems. Alternative technologies exist, and not every product in a listed category contains antimony.

A. Electrical parts, textiles and rubber

See Campine textile and plastic examples, Nihon Seiko applications and sodium antimonate use. Purchasing considerations are an editorial discussion checklist, not a substitute for formulation testing.

B. Solar cover glass, ceramics and polyester

Sources: NYACOL solar-glass applications, Campine pigment feedstocks and antimony glycolate for polyester.

Use in PET means participation in the polymerization catalyst system, not direct addition of ingots to finished plastic. Use in solar glass does not mean every photovoltaic module uses an antimony-containing formulation.

C. Batteries, automotive brakes and industrial bearings

Sources: alloy uses from the Royal Society of Chemistry, Nihon Seiko friction-material information and Waukesha bearing materials.

Lead-acid batteries use different grid-alloy designs; not all use lead-antimony. Likewise, babbitt linings belong to particular plain-bearing designs, not all bearings.

D. Cables, functional coatings and infrared analysis

Sources: Nihon Seiko cable-material applications, NYACOL doped tin oxide and Hamamatsu detector selection.

A broad range of uses does not make one antimony product suitable for every application. Establish whether the purchase is for ingots, compounds, formulated products or functional materials before agreeing on specifications. This industry overview does not mean RTV manufactures or supplies every listed product, nor does it identify RTV customer projects.

A grade describes an agreed product class; a test report records results for particular samples; the contract sets acceptance requirements for the transaction. These must correspond.

RTV uses No. 2 antimony ingot (Sb99.65) as a reference grade in supply discussions. It is not a complete analysis of every batch or proof of suitability for any particular process. Confirm requirements against the purchasing specification, agreed standard and batch results. RTV antimony ingot information

An SGS report alone does not establish that an entire cargo conforms. Verify the scope, sample origin and correspondence with the goods. Client-submitted samples and on-site sampling by the testing organisation may support different conclusions. SGS considers material characteristics and commercial requirements when planning metal sampling; one fixed sampling percentage cannot serve every ingot order. SGS mineral and metal sampling

See the antimony sampling and batch-verification guide for further preparation.

RTV is the exclusive sales agent for its partner antimony smelter in Laos; exclusivity is limited to that partner factory. RTV coordinates purchasing requirements, batch information and delivery arrangements. The partner factory performs the smelting. Agency roles

For No. 2 ingots, RTV's minimum purchase quantity is 25 metric tonnes. Buyers complete KYC verification and sign the contract one month in advance; the actual delivery date is agreed separately. Handover takes place through an in-warehouse transaction at the Laem Chabang bonded warehouse in Thailand. After taking delivery, the buyer arranges onward transport independently. Purchasing guide

For an initial inquiry, provide the company name, quantity, intended use, quality specification, desired handover date, third-party testing requirements and collection or transport plans. Price, available lots and delivery timing are confirmed for the actual transaction.

Submit an antimony ingot inquiry

Can ore directly replace ingots?

They are not interchangeable feedstocks. Ore contains other minerals and requires appropriate processing; ingots have already been smelted and refined. The buyer must assess suitability for its equipment and process.

Is antimony ingot the same as antimony trioxide?

No. Ingots are mainly metallic antimony, whereas antimony trioxide is the compound Sb₂O₃. Their specifications and uses differ.

Does Sb99.65 mean every downstream plant can use it?

No. Impurity limits and application requirements must also be checked. The grade alone does not determine the quality of the downstream product.

Can pictures prove purity or stock availability?

No. Pictures help describe appearance or packaging. Purity requires test results; stock and title require corresponding batch and warehouse records. The images in this article are AI illustrations, not evidence of available cargo.

Does RTV manufacture all the downstream products shown?

This article explains the antimony supply chain. RTV's role described here concerns ingot sales for its partner smelter; the downstream materials and applications shown do not define RTV's manufacturing or supply scope.