Fluoride raw materials, shipped from China to your plant.

Cryolite, potassium hexafluoroaluminate and aluminum fluoride for aluminum smelting, welding fluxes, ceramics and glass, with batch-level quality control and export documentation handled for you.

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Typical specification

ProductFormulaPurity
CryoliteNa₃AlF₆F ≥ 52%
Potassium cryoliteKAlF₄ / K₃AlF₆KAlF₄ ≥ 98%
Aluminum fluorideAlF₃F ≥ 60%
Full COA and TDS supplied with every shipment.

Industries we serve

Our fluoride raw materials go into aluminum, welding, glass and abrasive products worldwide.

About us

Micro Chemical Industry Ltd is a leading exporter of high-quality fluor-series chemicals, serving a wide range of industries including aluminum manufacturing and flux, welding flux, grinding and abrasives industries, metallurgical materials, casting, glass ceramics, refractory materials, fireworks, cement flocculants and more. Micro Chemical is a privately owned company founded in 2008. MICROCHEM has an extensive production facility including an R&D laboratory.

Production Capabilities

With staff of highly experienced Chemical Engineers and workers, we have the ability to offer stable quality products and custom packaging for large orders. Our advanced facilities allow us to supply 50,000 tons of cryolite and 10,000 tons of potassium cryolite and 5,000 tons of other fluor-series chemicals, we are well-positioned to deliver high-volume orders in a short time, helping you stay competitive and well-stocked.

2008founded
50,000 tcryolite
10,000 tpotassium cryolite
5,000 tother fluor-series chemicals

Established with the vision to connect reliable chemicals to international markets, we specialize in providing a diverse range of products from industrial-grade chemicals to specialty compounds. The products we provide are more than common grade, Micro Chemical can also produce cryolite, potassium cryolite and other fluor-series products with special technical indicators or special physical states such as powder, ultra-fine powder (nano-level) and granular according to customer needs. With a strong commitment to quality, innovation, and sustainability, Micro Chemical Industry Ltd ensures that each product meets the highest industry standards and customers’ requirements.

Backed by a team of highly skilled professionals, we are committed to delivering with swift response, ensuring a smooth and worry-free partnership. Without minimal order quantity, our efficient logistics and customer service team allow us to deliver products on time and at competitive prices, no matter the destination.

Our facilities

Products

Core fluoroaluminate series, available in powder and granular grades. Custom specifications are accepted.

NaNa₃AlF₆

Cryolite (sodium fluoroaluminate)

Electrolyte additive for aluminum smelting; also used in abrasives, glass and enamel.

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KK₃AlF₆ / KAlF₄

Potassium hexafluoroaluminate

Key component of brazing flux for aluminum heat exchangers and fabricated parts.

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AlAlF₃

Aluminum fluoride

Smelting bath modifier that lowers energy use and improves current efficiency.

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PTFEOther products

PTFE coating materials

Fluoropolymer-related coatings for non-stick, anti-corrosive and demoulding applications in six series.

View details →

NaCryolite

Sodium hexafluoroaluminate · Sodium aluminum fluoride · Na₃AlF₆

Molecular formulaNa₃AlF₆
CAS No.13775-53-6
AppearanceWhite or light pink crystalline powder, sand or granules; odorless
GradeIndustrial grade
Specific gravity2.95–3.05 g/cm³
Melting pointAbout 1000 ℃
Specific heat1.056 J/g·℃ (18–100 ℃)
SolubilitySlightly soluble in water; insoluble in anhydrous hydrogen fluoride; absorbs moisture easily
StandardGB/T 4291-2017
PackingN.W. 25 kg plastic woven bag with liner, or as per customer’s requirement

Types by form and molecular ratio

Cryolite is divided into high and low molecular ratio grades according to the molecular ratio of sodium fluoride to aluminum fluoride.

Sand type80 mesh
  • Low melting point and fast melting speed, shortening the time to reach normal working state
  • Molecular ratio adjustable over a wide range, suiting different periods of the electrolytic cell
  • Low moisture content and small fluorine loss
  • Low production cost, raw materials easy to obtain
Powder type200–325 mesh
  • Molecular ratio from 1.75 to 2.5
  • Adjustable molecular ratio
Granular type1–10 mm
  • Good fluidity, suitable for mechanized blanking
  • High actual yield in electrolytic production, reducing the cost of electrolytic aluminum
  • Molecular ratio 2.5–3.0, especially suitable for electrolytic aluminum production

Specification (GB/T 4291-2017)

High-molecular ratio gradeF ≥ 52%
Common gradeF ≥ 53%

Applications

  • Aluminum electrolysis flux: in the Hall–Héroult method, a cryolite-based fluoride melt is the solvent for producing metallic aluminum, and no compound has yet been found to replace it. It is stable, does not decompose, volatilize or deliquesce under normal conditions, has a melting point higher than aluminum, and offers good electrical conductivity and energy saving.
  • Abrasives: wear-resistant additive for grinding wheels, abrasive discs and abrasive belts, improving wear resistance and cutting/grinding performance while extending service life and shelf life.
  • Glass: production of opal (milky white) glass.
  • Metallurgy: electrolyte component in the production of aluminum alloys, ferroalloys and “boiling” steel.
Request a quotation for cryolite

KPotassium hexafluoroaluminate

Potassium aluminum fluoride · KAlF₄ / K₃AlF₆

Chemical formulaKAlF₄, K₃AlF₆
AppearanceWhite or light grey-white powder
SolubilitySlightly soluble in water
Melting point560–580 ℃
PackingPlastic woven bag with liner, N.W. 25 kg, or as per customer’s requirement

Production

Anhydrous hydrofluoric acid is reacted with aluminum hydroxide to form fluoroaluminic acid, which is then reacted with potassium hydroxide at high temperature, followed by filtering, drying, melting and crushing into different meshes. The product can also be obtained from the reaction of aluminum fluoride, ammonium fluoride and potassium chloride.

Standard specification

KAlF₄ (%)Cl (%)Fe (%)SO₄ (%)Pb (%)Al (%)F (%)H₂O (%)
≥ 98≤ 0.05≤ 0.05≤ 0.05≤ 0.01< 19< 55≤ 1.2

Packing

Plastic woven bag with liner, N.W. 25 kg, or as per customer requirement.

Applications

  • Additive in aluminum electrolysis to produce high-purity aluminum metal
  • Heat welding and brazing
  • Pesticide industry
  • Flux for glass and ceramics
Request a quotation for potassium hexafluoroaluminate

AlAluminum fluoride

AlF₃ · Molecular mass 83.98

Chemical formulaAlF₃
Molecular mass83.98
AppearanceColorless or white crystals
SolubilityInsoluble in water, acid and alkali
StabilityVery stable; can be hydrolyzed by heating. At 300–400 ℃ it is partially decomposed by water vapor into hydrogen fluoride and aluminum oxide
PreparationReaction of aluminum trichloride with hydrofluoric acid and ammonia
Main useAluminum smelting
PackingN.W. 25 kg plastic woven bag with liner, or as per customer’s requirement

Types

Aluminum fluoride is classified as anhydrous, dry and wet aluminum fluoride. Anhydrous aluminum fluoride has a high main content and extremely low impurity content. It effectively adjusts the electrolyte molecular ratio and reduces hydrolysis losses in aluminum electrolytic production, which helps improve the quality of aluminum ingots and reduce production costs.

Standard specification of anhydrous aluminum fluoride

GradeF (%)Al (%)Na (%)SiO₂ (%)Fe₂O₃ (%)SO₄ (%)P₂O₅ (%)H₂O (%)Bulk density (g/cm³)
Excellent grade≥ 61≤ 31.5≤ 0.3≤ 0.1≤ 0.06≤ 0.1≤ 0.03≤ 0.5≥ 1.5
First grade≥ 60≤ 31≤ 0.4≤ 0.3≤ 0.1≤ 0.6≤ 0.04≤ 1.0≥ 1.3

Packing

N.W. 25 kg plastic woven bag with liner, or as per customer’s requirement.

Applications

  • Aluminum smelting: lowers the melting point and improves the conductivity of the electrolyte
  • Fermentation aid in alcohol production
  • Flux and glaze component for ceramic glazes and enamel glazes
  • Flux for smelting non-ferrous metals
Request a quotation for aluminum fluoride

PTFEPTFE Coating Materials for Industrial Applications

Anti-adhesive coating products

Micro Chemical Industry Ltd supplies fluoropolymer-related chemical materials to support a wide range of industrial coating applications. Polytetrafluoroethylene (PTFE) is widely used in industrial coating formulations due to its excellent non-stick properties, low coefficient of friction, chemical resistance and thermal stability. PTFE-based coatings are commonly applied to industrial rollers, moulds, valves, pumps, seals, chemical processing equipment, food processing machinery and other components requiring reduced surface adhesion and easier cleaning. Our focus is on supplying quality chemical raw materials to meet the needs of industrial manufacturers and coating formulators. Product specifications, packaging options and supply arrangements can be discussed according to customer requirements.

Anti-adhesive coating products

Swipe sideways to compare all six series.

3 series organic silicone7 series oil-based 380 coating9 series water-based PTFE coating8 series nano ceramic9 series industrial demoulding9 series anticorrosive coating
ColourAll colours4 colours: gray, gold, etc.; generally no other coloursBlack, gray, gold, etc.; generally no other coloursAll coloursGreen, black, grayBlack and gray
Physical propertiesOil baseOil baseWater baseWater baseWater baseAlcohol base
Solid content40±235±330±260±550±255±3
Thinner agentButyl ester, xyleneNMP, or mixtures with xylenePurified waterEthanolPurified water, red potionEthanol, xylene
Painting area (single layer)10–12 cm²8–10 cm²8–10 cm²7–8 cm²8–10 cm²–
Number of coating layersOne layer, two layersOne layer, two layersOne layer, two and three layersOne layer, two layersTwo layersOne layer or two layers
Painting methodSpray, roll, soakSpray, roll, soakSpray coating, roller coating, shower coating, soakingSpraySpray coating, roller coating, shower coating, soakingSpray coating, roller coating, shower coating, soaking
Dry film thickness16±4 µm15±3 µm15±2, 25±3, 30±4 µm25±5 µm30±5 µm25±5 or 35±5 µm
Curing temp.280 ℃350–400 ℃380–420 ℃220–280 ℃380–420 ℃20–100 ℃
Curing time10 mins15–10 mins15–10 mins20–10 mins40–30 mins24 hours – 60 mins
Shelf life of coating180 days180 days180 days180 days180 days180 days
Heat resistance180–800 ℃260–320 ℃260–320 ℃350–1200 ℃260 ℃100–150 ℃
Viscosity (Iwata Cup No. 2)25–50 s25–60 s25–35 s6–10 s25–35 sNA
Acid resistance (12% hydrochloric acid, heated to boiling)–15–20 mins50–60 mins15–20 mins2–3 minsAbove 1000 H
Alkali resistance (5% NaOH, heated to boiling)–24 H100 H–100 HAbove 1000 H
Solvent resistance (MEK, wipe, 1 kg)100–500Above 100Above 100Above 100Above 100Above 1000
Wear resistance (1.5 kg force)500–5000100–5005000–5000010000–150000100–5005000–30000
Non-stick (oil-free fried eggs)10–205–10Above 100010–50NANA
Water vapor resistancePoor4–8 H4–8 H4–8 H4–8 H4–8 H
Hardness3–4H3–4H1–2H8–9H1–2H6–8H
ApplicationsCake pans, baking pans, electric irons, iron pots, heating plates, knives, pot exterior paint, etc.Rice cooker inner pot, baking pan, iron pan, frying pan, pressure cooker, aluminum non-stick pan, square pan, heating plate, etc.Rice cooker inner pot, baking pan, pressure cooker, aluminum non-stick pan, electric wok, electric griddle, Korean square pot, electric cake stall, steamed rice, cake plate, sandwich, etc.Cake molds, non-stick pans, electric irons, hairpins, release molds, sandwiches, barbecue racks, knives, screws, toasters, gas stoves, griddles, deep fryers, rice cooker/pressure cooker linerProduct surface of molds, templates, printing and dyeing industry, rollers, roller rods, shafts, laser rods, valves, round art tools, industrial machinery accessories, etc.Storage tanks, various chemical reactors, heat exchangers, stirring and neutralizing tanks, acid/alkali resistant pumps and fans, petrochemical storage tanks, pipelines, etc.
Applicable regulationsFDA, RoHS, LFGB, PAHs, REACH; PFOA/PFOS excluded

Note: Various products can be adjusted and supplied according to customer needs, but only within the range shown in the above table. For example, the heat resistance of silicone can be formulated within the range of 180–800 ℃. For more details, please refer to the product information or consult technical personnel.

Request a quotation for coating materials

Services

Renowned for exceptional quality and reliability, and driven by customer satisfaction and a focus on safety, our products are trusted by customers in over 50 countries and regions worldwide. We are proud to be a trusted partner for businesses around the world as a proven partner for global market. Whether you need bulk orders or specialized chemical formulations, Micro Chemical Industry Ltd is your go-to source for premium, reliable, and efficient chemical export solutions.

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Custom specification

Particle size, bulk density and impurity limits matched to your process.

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Quality assurance

Batch testing, retained samples and COA for every shipment.

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Packing and logistics

25 kg bags, 1 t jumbo bags, container loading, FOB, CIF and DAP terms.

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Compliance support

MSDS, REACH-related documents and customs paperwork prepared in advance.

Our Mission

Application

Where our fluoride raw materials are used.

Aluminum smelting

Cryolite and AlF₃ for electrolytic bath composition.

Brazing and welding flux

Potassium fluoroaluminate for controlled, oxide-free joints.

Glass and enamel

Opacifier and flux for glass, ceramic glazes and enamel.

Abrasives

Filler and active component in resin-bonded grinding wheels.

Markets we serve

We export fluoride raw materials and PTFE coating materials from China to customers worldwide, including the regions below.

North America

Cryolite, aluminum fluoride and brazing-flux raw materials for industrial buyers in the USA, Canada and Mexico.

South America

Fluoride raw materials for aluminum, glass and abrasive producers in Brazil, Argentina, Chile, Peru and Colombia.

Middle East & North Africa

Supply for aluminum smelters and metal industries in the UAE, Saudi Arabia, Bahrain, Oman, Qatar, Egypt, Algeria, Morocco and Tunisia.

Russia

Cryolite, aluminum fluoride and potassium cryolite for Russian and neighbouring CIS industrial buyers.

Southeast Asia

Fluoride chemicals and PTFE coatings for buyers in Indonesia, Malaysia, Vietnam, Thailand, the Philippines and Singapore.

Company overview in your language

Short summaries of our company and products. Full product data is in English above.

Español

Micro Chemical Industry Ltd (MICROCHEM), fundada en 2008, exporta desde China criolita, criolita potásica (hexafluoroaluminato de potasio), fluoruro de aluminio y recubrimientos de PTFE para fundición de aluminio, fundentes de soldadura y soldadura fuerte, abrasivos, vidrio y cerámica. Sin cantidad mínima de pedido. Contacto: enquiry@microchemindustry.com

Português

A Micro Chemical Industry Ltd (MICROCHEM), fundada em 2008, exporta da China criolita, criolita potássica (hexafluoroaluminato de potássio), fluoreto de alumínio e revestimentos de PTFE para fundição de alumínio, fluxos de soldagem e brasagem, abrasivos, vidro e cerâmica. Sem quantidade mínima de pedido. Contato: enquiry@microchemindustry.com

العربية

تقوم شركة Micro Chemical Industry Ltd (MICROCHEM)، التي تأسست عام 2008، بتصدير الكريوليت وكريوليت البوتاسيوم (سداسي فلورو ألومينات البوتاسيوم) وفلوريد الألومنيوم وطلاءات PTFE من الصين، لاستخدامها في صهر الألومنيوم ومساعدات اللحام واللحام بالنحاس والمواد الكاشطة والزجاج والسيراميك. لا يوجد حد أدنى لكمية الطلب. للتواصل: enquiry@microchemindustry.com

Русский

Micro Chemical Industry Ltd (MICROCHEM), основанная в 2008 году, экспортирует из Китая криолит, калиевый криолит (гексафторалюминат калия), фторид алюминия и покрытия на основе ПТФЭ для производства алюминия, сварочных и паяльных флюсов, абразивов, стекла и керамики. Минимального объёма заказа нет. Контакты: enquiry@microchemindustry.com

Français

Micro Chemical Industry Ltd (MICROCHEM), fondée en 2008, exporte depuis la Chine de la cryolithe, de la cryolithe potassique (hexafluoroaluminate de potassium), du fluorure d’aluminium et des revêtements PTFE pour la fonderie d’aluminium, les flux de soudage et de brasage, les abrasifs, le verre et la céramique. Aucune quantité minimale de commande. Contact : enquiry@microchemindustry.com

Bahasa Indonesia

Micro Chemical Industry Ltd (MICROCHEM), didirikan pada 2008, mengekspor kriolit, kriolit kalium (kalium heksafluoroaluminat), aluminium fluorida, dan pelapis PTFE dari Tiongkok untuk peleburan aluminium, fluks las dan brazing, abrasif, kaca, dan keramik. Tanpa jumlah pesanan minimum. Kontak: enquiry@microchemindustry.com

Tiếng Việt

Micro Chemical Industry Ltd (MICROCHEM), thành lập năm 2008, xuất khẩu từ Trung Quốc cryolit, cryolit kali (kali hexafluoroaluminat), nhôm florua và lớp phủ PTFE dùng trong luyện nhôm, thuốc hàn và hàn đồng, vật liệu mài, thủy tinh và gốm sứ. Không yêu cầu số lượng đặt hàng tối thiểu. Liên hệ: enquiry@microchemindustry.com

ไทย

บริษัท Micro Chemical Industry Ltd (MICROCHEM) ก่อตั้งในปี 2008 ส่งออกไครโอไลต์ ไครโอไลต์โพแทสเซียม (โพแทสเซียมเฮกซะฟลูออโรอะลูมิเนต) อะลูมิเนียมฟลูออไรด์ และสารเคลือบ PTFE จากประเทศจีน สำหรับการถลุงอะลูมิเนียม ฟลักซ์เชื่อมและบัดกรีแข็ง วัสดุขัดถู แก้ว และเซรามิก ไม่มีปริมาณการสั่งซื้อขั้นต่ำ ติดต่อ: enquiry@microchemindustry.com

Frequently asked questions

Quick answers about our cryolite, aluminum fluoride, potassium cryolite and PTFE coating products.

What products does Micro Chemical Industry Ltd export?

We export cryolite (sodium hexafluoroaluminate, Na3AlF6), potassium cryolite (potassium hexafluoroaluminate, KAlF4 / K3AlF6), aluminum fluoride (AlF3) and PTFE anti-adhesive coating materials from China.

What are the specifications of your cryolite?

Our cryolite follows GB/T 4291-2017. The high-molecular ratio grade is F ≥ 52% and the common grade is F ≥ 53%. CAS No. 13775-53-6, industrial grade.

Which forms of cryolite are available?

Sand type (80 mesh), powder type (200–325 mesh) and granular type (1–10 mm). We can also supply special technical indicators or physical forms, including ultra-fine powder, on request.

What grades of aluminum fluoride do you supply?

Anhydrous aluminum fluoride in Excellent grade (F ≥ 61%, bulk density ≥ 1.5 g/cm³) and First grade (F ≥ 60%, bulk density ≥ 1.3 g/cm³).

What packing do you offer?

N.W. 25 kg plastic woven bags with liner, or packing according to customer requirements.

Is there a minimum order quantity?

No. We accept orders without a minimum order quantity and can also deliver bulk orders.

What is your production capacity?

We can supply 50,000 tons of cryolite, 10,000 tons of potassium cryolite and 5,000 tons of other fluor-series chemicals.

Which industries use your products?

Aluminum smelting, welding and brazing flux, grinding and abrasives, metallurgy, casting, glass and ceramics, refractory materials, fireworks and cement flocculants.

Which regulations do your PTFE coatings meet?

Our anti-adhesive coating products are listed as meeting FDA, RoHS, LFGB, PAHs and REACH requirements, with PFOA and PFOS excluded.

How can I request a quotation?

Email enquiry@microchemindustry.com or call or WeChat +86 13477062907, or use the inquiry form on the Contact section. Please state the product, grade and quantity.

Contact

Tell us the product, grade and quantity. We reply with a quotation within one working day.

Email
enquiry@microchemindustry.com
Mob / WeChat
+86 13477062907
Address
No. 29 Anle Street,
Zhongshan District, Dalian City, China