Sodium sesquicarbonate Production Cost Reports

The report provides detailed analysis essential for establishing a sodium sesquicarbonate production plant. It encompasses all critical aspects necessary for sodium sesquicarbonate production, including the cost of sodium sesquicarbonate production, sodium sesquicarbonate plant cost, sodium sesquicarbonate production costs, and the overall sodium sesquicarbonate production plant cost. Additionally, the study covers specific expenditures associated with setting up and operating a sodium sesquicarbonate production plant. These encompass production processes, raw material requirements, utility requirements, infrastructure needs, machinery and technology requirements, manpower requirements, packaging requirements, transportation requirements, and more.

Sodium Sesquicarbonate Market Analysis: Demand and Supply Analysis, and Sourcing

Sodium sesquicarbonate, Na2CO3·NaHCO3·2H2O, is a double salt that occurs naturally as trona. Trade names include Sesqui, S-Carb for feed applications, SOLVAir S200 for sorbent applications, CREX, and trisodium hydrogendicarbonate. Genesis Alkali, now part of WE Soda, sells Sesqui through Univar and Harcros in 50 lb bags, one-ton sacks, and bulk quantities.

A sodium sesquicarbonate demand and supply analysis faces a data gap because public sources generally report figures for the broader soda ash market. In the latest base year, the global soda ash volume is estimated at 69,560,000 tons and is projected to reach 84,790,000 tons by 2035, growing at 2.00% per year. Glass is the leading end-use sector, followed by detergents, chemicals, metallurgy, and pulp and paper. Asia Pacific accounts for about 50% of global capacity.

Our own estimate places annual direct-use sesquicarbonate and trona consumption at 400,000 to 900,000 tons, equivalent to 0.6% to 1.3% of soda ash volume. This range has not been published and is based on several factors, including flue gas desulfurization, which accounted for 4% of US soda ash use last year according to the USGS, as well as demand from feed, cleaning, pool, and water applications.

Soda ash and sodium bicarbonate prices provide a reference for valuing a ton of sodium sesquicarbonate. Prices in China rose from USD 205 to USD 212, in Europe from USD 409 to USD 419, and in India from USD 285 to USD 292. In Q2 2026, sodium bicarbonate prices stood at USD 512 in the United States, USD 476 in Germany, USD 284 in China, and USD 353 in India.

By mass, one ton of sodium sesquicarbonate contains 0.469 tons of carbonate, 0.372 tons of bicarbonate, and 0.159 tons of water. Based on Q2 2026 prices, the carbonate and bicarbonate content is valued at USD 279 in the US, USD 205 in China, USD 268 in India, and USD 373 in Europe, using German bicarbonate prices for Europe. These four values are our own estimates and exclude water, crystallization, freight, handling, and margin costs.

Sodium sesquicarbonate supply follows the broader soda ash market. The United States has 13,900,000 tons of nameplate capacity, with five plants in Wyoming and one in California. Turkey, Kenya, Botswana, and China also contribute natural soda ash output. After acquiring Genesis Alkali, WE Soda has approximately 9,500,000 tons of group capacity. Buyers qualify suppliers based on total alkalinity, bicarbonate content, moisture, bulk density, and insoluble matter.

Summary of the Product, Grades, and Uses

Sodium sesquicarbonate has a molar mass of 226.03 g/mol and consists of 46.9% sodium carbonate, 37.2% sodium bicarbonate, and 15.9% water. Its CAS number is 533-96-0, and its EC number is 208-580-9. Trona has CAS number 6106-20-3, while the food additive code for sodium sesquicarbonate is E500(iii).

The refined product appears as white needle-shaped crystals, with a specific gravity of 2.12, a bulk density of 0.74 g/cm³, and a pH of 9.9 in a 1% solution. At 25 degrees Celsius, 17.1% of the salt dissolves in water. At temperatures near 135 to 150 degree Celsius, the crystals lose carbon dioxide and water and convert into soda ash.

Sodium sesquicarbonate is available in four main grades. Harcros lists refined crystal grade with 71.5% total alkalinity expressed as sodium carbonate, a maximum arsenic content of 3 ppm, a maximum heavy-metal content of 10 ppm, and 0.01% chloride. Feed-grade S-Carb is supplied as a free-flowing crystal. Sorbent-grade SOLVAir S200 is made from trona containing about 97% sodium sesquicarbonate, while food-grade material complies with FDA and EU food additive regulations.

Main End-Uses of Sodium Sesquicarbonate

Flue gas treatment is the leading technical application of sodium sesquicarbonate. In dry sorbent injection, trona is introduced into hot flue gas, where it calcines at temperatures above 275 °F to form porous soda ash. Solvay reports up to 90% SO2 removal, 95% to 99% HCl removal, 20% to 70% mercury removal when treated alone, and 98% SO3 removal at one plant. A technical article on the Georgia EPD website states that trona requires no milling and is suitable for SO2 removal duties below 50%.

Animal feed is the next major application. Genesis Alkali markets S-Carb as a rumen buffer that helps prevent butterfat depression in low-fiber dairy diets. In poultry feed, it supports electrolyte balance, heat tolerance, litter moisture control, and eggshell quality. The FDA lists sodium sesquicarbonate as generally recognized as safe for animal feed under 21 CFR 582.1792.

Cleaning and water treatment are other important applications. Sodium sesquicarbonate can replace trisodium phosphate in heavy-duty cleaners, soften laundry water, and increase alkalinity in pools, spas, and wastewater. Suppliers also list it for use in bath salts, hard-surface cleaners, diaper rinses, and abrasive blasting.

Food applications represent a smaller market segment, based on our assessment. The FDA has affirmed sodium sesquicarbonate as generally recognized as safe for food use under 21 CFR 184.1792. End-use volume data have not been published, but our assessment indicates that sorbent and animal feed applications account for the larger share of demand.

Sodium Sesquicarbonate Market Risks

Sodium sesquicarbonate faces demand and pricing risks due to oversupply in the soda ash market. Pacific Soda attributes lower global prices to Chinese exports to India, Bangladesh, and Malaysia. The company has asked Wyoming regulators to extend the Dry Creek construction deadline from December 2026 to December 2027. According to the USGS, the average US soda ash value was USD 150 per ton last year, down from USD 169 per ton a year earlier.

Substitution is another key risk. Hydrated lime, sodium bicarbonate, and caustic soda compete with sodium sesquicarbonate in sorbent, cleaning, and alkali applications. According to the Georgia EPD article, sodium bicarbonate is preferred when SO2 removal exceeds 70%. Based on our assessment, the retirement of coal-fired power plants could also reduce demand for sorbents.

Classification and quality concerns present additional risks. The Japanese government list classifies sodium sesquicarbonate as a skin, eye, and respiratory irritant, although supplier safety data sheets vary. Exposure to temperatures above 135 degrees Celsius converts the crystals into soda ash and releases carbon dioxide and water. This reduces the bicarbonate content and changes the product's assay.

Sodium Sesquicarbonate Production Process and Main Cost Drivers

Sodium sesquicarbonate production follows three routes. Trona ore is crushed for sorbent use, trona liquor is crystallized for refined product, and soda ash is carbonated for synthetic crystal.

1. By Carbonation of Soda Ash Solution with Carbon Dioxide and Crystallization: The main inputs are soda ash, carbon dioxide, process water, and steam.

In practice, soda ash is dissolved in hot mother liquor to form a solution containing about 24 wt% sodium carbonate. Carbon dioxide is then added to convert one-third of the carbonate into bicarbonate, establishing the 1:1 ratio required for the double salt. The solution is cooled to 30 to 40 degree Celsius, where sodium sesquicarbonate forms as the only solid phase. A centrifuge separates the crystals, which are then dried in a fluid bed, cooled, and screened to obtain the required product grade.

The patent describes a process using solution-mined trona liquor and reports recycling 77% to 84% of the mother liquor in its examples. The EPA describes the natural route as dissolving trona in water, filtering the solution, and crystallizing it in vacuum crystallizers. Tata Chemicals Magadi washes crushed lake trona to reduce sodium chloride content from 11.5% to 0.33% before calcination.

The stoichiometry is straightforward. Producing one mole of sodium sesquicarbonate, with a molar mass of 226.03 g/mol, requires 1.5 moles of soda ash, 0.5 moles of carbon dioxide, and 2.5 moles of water. Before accounting for yield losses, producing one kilogram of the product requires 0.703 kg of soda ash, 0.097 kg of carbon dioxide, and 0.199 kg of water. If sodium bicarbonate is purchased as an input, the requirement changes to 0.469 kg of soda ash, 0.372 kg of sodium bicarbonate, and 0.159 kg of water per kilogram of product.

Main Factors Affecting Sodium Sesquicarbonate Production Cost

Sodium sesquicarbonate production costs are driven mainly by soda ash. Assuming a 98.5% yield, one ton of product requires 0.714 tons of soda ash. Recently recorded soda ash prices are USD 164.25 and USD 152.70 FOB China. India CIF prices were USD 271.06 and USD 243.49, while US CIF prices were USD 351.74 and USD 308.32. These represent declines of 7.0%, 10.2%, and 12.3%, respectively.

In August, the soda ash contained in the finished product cost USD 109 in China, USD 174 in India, and USD 220 in the United States. Carbon dioxide adds about USD 16 per ton, assuming a price of USD 150 per ton and 90% utilization. This brings the estimated material cost to approximately USD 125 in China, USD 190 in India, and USD 236 in the United States, with soda ash accounting for 87% to 93% of the total. Using purchased sodium bicarbonate costs more. Blending with bicarbonate priced at USD 177.78 FOB China or USD 268.78 CIF India adds USD 12 and USD 24 per ton, respectively, compared with the carbonation route.

Trona from Wyoming sets the lower cost limit. According to the USGS, producing one ton of soda ash requires 1.8 tons of trona, with a value of about USD 150 per ton of soda ash. On this basis, the ore is worth up to USD 83 per ton. At 90% recovery and a 92% assay, producing one ton of crystals requires 1.21 tons of ore, costing up to USD 101. At that price, the soda ash route costs USD 107 per ton. For integrated producers, mine costs below this level provide the margin.

Drying, centrifuge power, steam, and cooling water add an estimated USD 45 to 70 per ton at an annual production volume of 20,000 tons. Labor, packaging, and maintenance costs are additional.

Raw Materials for Sodium Sesquicarbonate Production Plant and its Procurement

Raw material procurement for a sodium sesquicarbonate production plant mainly involves soda ash, carbon dioxide, process water, and steam, with sodium bicarbonate and packaging materials as supporting inputs. A plant located next to a trona facility can source ore or trona liquor instead.

Recently, soda ash prices are recorded at USD 152.70 FOB China, USD 243.49 CIF India, USD 308.32 CIF USA, and USD 295.13 CIF Brazil. Sodium bicarbonate prices stood at USD 177.78 FOB China, USD 268.78 CIF India, USD 291.78 CIF Germany, and USD 319.78 CIF Brazil.

Moreover, India imposes anti-dumping duties of USD 17 to USD 113 per ton on soda ash imports from Turkey, Russia, the US, and Iran. Annual supply contracts are indexed to a published price series. Carbon dioxide can be sourced from a liquid CO2 supplier, a lime kiln, a boiler stack, or a nearby ethanol plant. Based on the assessment, soda ash specifications should set limits for sodium chloride, sulfate, iron, and insoluble matter.

Sustainability and Regulatory Requirements

Sodium sesquicarbonate production raises four main environmental concerns: dust emissions, mother liquor purge, dryer exhaust, and carbon dioxide supply. Control measures include bag filters for dust, cyclones for fine particles, evaporation or approved discharge for the purge, and a scrubber for dryer exhaust. The reaction consumes about 0.10 tons of carbon dioxide per ton of product.

Mining creates additional environmental impacts. The EPA reports carbon dioxide emissions of 150 kg per Mg for a sesquicarbonate rotary calciner. Solvay plans to install regenerative thermal oxidation at Green River to reduce site greenhouse gas emissions by 20%.

In the United States, the FDA recognizes sodium sesquicarbonate as generally recognized as safe for food and feed uses. In the EU, it is classified as E500(iii), with EC number 208-580-9. REACH Annex V, Entry 7, exempts unmodified minerals and ores from registration. Based on our assessment, mined trona and synthetic sodium sesquicarbonate crystals follow different registration pathways.

CAPEX and OPEX for a Sodium Sesquicarbonate Production Plant

A sodium sesquicarbonate production plant consists of dissolving, carbonation, and crystallization units, followed by centrifugation and drying. The main equipment includes a dissolver, carbonator, cooling crystallizer, centrifuge, fluid-bed dryer, bagging line, and carbon dioxide supply skid. The quality-control laboratory performs titrations to measure total alkalinity and bicarbonate content, along with tests for moisture, bulk density, chloride, sulfate, iron, and heavy metals.

Public benchmarks for sodium sesquicarbonate plant setup costs come mainly from integrated trona projects. Solvay estimates that its 600,000 tons-per-year expansion at Green River will cost about USD 200 million, equivalent to USD 333 per annual ton of capacity. WE Soda paid USD 1.425 billion for Genesis Alkali's 4,300,000 tons of capacity, or USD 331 per annual ton. Project West was estimated to cost USD 2.6 billion for 3,000,000 tons of capacity, while Dry Creek lists an investment of over USD 5 billion for approximately 6,000,000 tons.

These figures include mines and calciners, so they serve as rough upper benchmarks for a downstream production plant. Our estimate for a plant with an annual capacity of 20,000 tons is USD 8 to 12 million, equivalent to USD 400 to 600 per annual ton. Smaller crystallizers offer fewer economies of scale.

Operating expenditure (OPEX) consists mainly of raw materials, estimated at USD 125 to 236 per ton based on August 2026 prices. At an annual production capacity of 20,000 tons, the plant would require approximately 14,280 tons of soda ash, 2,160 tons of carbon dioxide, and 3,990 tons of water. Plant utilization is the main factor affecting overall costs.

Plant Location and Investment Factors

A sodium sesquicarbonate site should sit near soda ash or trona, a carbon dioxide source, and its customers. Wyoming offers trona, a Union Pacific line that first carried over 90% of Sisecam soda ash, and an Oregon export terminal. Turkey has the Beypazari cluster, Kenya ships through Mombasa & China has the Inner Mongolia natural soda belt.

Outside those regions, the first choice is buying or making soda ash. Buying keeps CAPEX low and ties the plant to one supplier. Europe paid the highest soda ash price at USD 419 in Q2 2026, which favors imported crystal, by our reading.

Major Sodium Sesquicarbonate Producing Regions

North America leads in refined sesquicarbonate, and Wyoming hosts Genesis Alkali, Solvay, Sisecam, and Tata Chemicals on the producer lists we reviewed. Turkey follows with Eti Soda at Beypazari.

Kenya and Botswana supplied 270,000 and 290,000 tons of soda ash last year, USGS reports. China makes an estimated 38,000,000 tons of soda ash, mostly synthetic, and its Inner Mongolia natural alkali plants are growing. Sesquicarbonate capacity by country is unpublished.

Key Sodium Sesquicarbonate Producers

WE Soda

• Bought Genesis Alkali's two Wyoming trona mines from Genesis Energy for USD 1.425 billion last March.
• Sells Sesqui crystal for cleaning, pool & water uses, and S-Carb for dairy cows & poultry, with Univar and Harcros reselling.
• Competes on group capacity of about 9,500,000 tons a year and earnings of USD 502 million two years ago.
• Regulatory record shows a Genesis nutritional analysis with 0.25% maximum moisture, so a buyer should request the full specification.

Solvay

• Runs the Green River soda ash plant in Wyoming and sells SOLVAir S200, a sorbent at about 97% sodium sesquicarbonate.
• Ships S200 in bulk bags, 24-ton trucks, and 100-ton railcars, and quotes 95% to 99% HCl removal.
• Competes on a 600,000 tons a year expansion costing about USD 200 million, with a 20% cut in site greenhouse gas.
• Regulatory record on the product page calls S200 non-hazardous and non-flammable, so each safety data sheet still needs review.

Sisecam

• Runs Sisecam Chemicals Wyoming near Green River and mines about 4.3 million short tons of trona a year.
• Sold 2.3 million short tons of soda ash last year for net sales of USD 529.4 million, about half from exports.
• Competes through Pacific Soda, whose Dry Creek project plans 6,000,000 tons of soda ash & 440,900 tons of baking soda.
• Regulatory record is thin, since the NRP filing names sodium sesquicarbonate only as the chemical name of trona.

Tata Chemicals

• Operates Lake Magadi in Kenya, where trona is mined, washed, calcined to soda ash & railed to Mombasa.
• Ranks third globally in low-cost natural soda ash capacity by its own profile, with sites in four countries.
• Competes on growth capital, since INR 910 crore has been approved for soda ash and silica capacity.
• Regulatory record on the Magadi page names sodium sesquicarbonate only as the calciner feed, so refined grades need a direct inquiry.

Eti Soda

• Operates at Beypazari near Ankara, solution-mining trona into soda ash and bicarbonate as a WE Soda facility.
• Reached 1,000,000 tons of soda ash and 100,000 tons of baking soda a year in its first year, per Wikipedia.
• Competes on a deposit found in 1979 during coal exploration and on low-carbon claims published on its company site.
• Regulatory record lists soda ash and bicarbonate, and owners differ between Wikipedia and the company site.

Inner Mongolia Yuanxing Energy

• Runs the Alashan natural soda project, whose first phase makes 5,000,000 tons of soda ash & 400,000 tons of baking soda.
• Started feeding the first 1,000,000 tons line of a 2,800,000 tons second phase on December 9 last year.
• Competes on natural soda cost, and USGS links 5,000,000 tons a year of Inner Mongolia growth to global oversupply.
• The regulatory record names natural soda only, so product forms and any sesquicarbonate grade need confirmation.