American Potash and Chemical Company
American Potash and Chemical Company, also known as AMPOT, was a major United States chemical manufacturer active from the 1920s through the 1960s before being acquired and reorganized by Kerr-McGee.
Last updated August 25, 2026
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Overview
American Potash and Chemical Company, commonly abbreviated as AMPOT, was a United States chemical manufacturer whose principal industrial base was at Searles Lake in Trona, California. The company began with the extraction and processing of borax and potash from the lake’s mineral deposits, linking its early identity to the natural-resource chemistry of California’s Mojave Desert. Over time, it developed into a diversified supplier of industrial chemicals rather than remaining focused only on potash-related materials. The company was active from the 1920s through the 1960s and became an important employer in the Trona area. In 1948, it was reported to be San Bernardino County’s second-largest employer, with approximately 1,600 of Trona’s 5,000 residents on its payroll. This employment base illustrates the extent to which AMPOT’s operations shaped the local economy and community. During World War II, AMPOT expanded its manufacturing range to support broader military and industrial requirements. Its later Cold War production included ammonium perchlorate, an oxidizer used in solid rocket propellants. The company supplied this material for a number of United States missile programs, including Falcon, Hawk, Minuteman, Nike Zeus, Pershing, Polaris, Scout, Sergeant, and Tartar. These activities placed the company within the strategic materials and defense-manufacturing network of the postwar United States. In the 1950s, AMPOT pursued diversification through acquisitions. It acquired Eston Chemicals, Western Electrochemical, and Lindsay Chemical Company, adding new chemical capabilities and product areas. The Lindsay transaction also brought the Rare Earths Facility in West Chicago, Illinois, into AMPOT’s operations. The company additionally acquired a substantial interest in Compagnie des Potasses du Congo, extending its involvement in potash beyond its original California base. Kerr-McGee acquired AMPOT in 1967. Around 1970, Kerr-McGee reorganized the business as Kerr-McGee Chemical Corporation, commonly known as KMCC. AMPOT therefore ceased to exist as an independent corporate identity, although portions of its industrial operations continued within the successor organization. In 2006, KMCC was spun off as Tronox. The available reference material does not establish a complete account of AMPOT’s original incorporation, ownership structure before the Kerr-McGee transaction, senior leadership, revenue, or the precise disposition of every product line. Its documented significance rests on its transformation from a Searles Lake potash and borax producer into a diversified chemical and defense-materials manufacturer, and on the continuity of parts of its business through Kerr-McGee Chemical Corporation and later Tronox.
History
American Potash and Chemical Company was a United States chemical manufacturer active from the 1920s through the 1960s. It is also identified by the abbreviation AMPOT. The company’s early operations were based on the mineral resources of Searles Lake at Trona, California, where it produced borax and potash. These activities placed it within the extractive and basic-chemicals industries and connected its fortunes closely to the industrial development of the Trona area. AMPOT later expanded beyond its original mineral products. During World War II, the company diversified into other chemicals to meet wider industrial and military demand. Its growth made it a major local employer. In 1948, approximately 1,600 of Trona’s 5,000 residents worked for the company, and AMPOT was described as San Bernardino County’s second-largest employer. The company continued diversifying during the 1950s through acquisitions. It bought Eston Chemicals, Western Electrochemical, and Lindsay Chemical Company. The Lindsay acquisition also brought the Rare Earths Facility in West Chicago, Illinois, into the organization. AMPOT also obtained a substantial interest in Compagnie des Potasses du Congo, giving it an overseas potash-related investment in addition to its California operations. Cold War demand further connected AMPOT with strategic materials. The company manufactured ammonium perchlorate, a key oxidizer for solid rocket propellants. Its products were associated with a range of United States missile programs, including Falcon, Hawk, Minuteman, Nike Zeus, Pershing, Polaris, Scout, Sergeant, and Tartar. This work reflected the company’s evolution into a diversified supplier serving both civilian industry and national defense. Kerr-McGee acquired AMPOT in 1967. Around 1970, the acquired operations were reorganized as Kerr-McGee Chemical Corporation, or KMCC, and AMPOT no longer operated as an independent corporate entity. In 2006, KMCC was spun off as Tronox. The available source does not provide a fully documented founding date, founder, executive roster, financial history, or complete product catalogue. Accordingly, those details remain unspecified rather than inferred.
- 2006
Successor spun off as Tronox
[1]Kerr-McGee Chemical Corporation was spun off as Tronox, continuing part of the corporate lineage associated with AMPOT.
- 1970
Reorganization as Kerr-McGee Chemical Corporation
[1]Around this year, Kerr-McGee reorganized AMPOT into Kerr-McGee Chemical Corporation.
- 1967
Acquisition by Kerr-McGee
[1]Kerr-McGee bought American Potash and Chemical Company.
- 1948
Major employer in Trona
[1]The company employed about 1,600 people in a community of roughly 5,000 and ranked as San Bernardino County’s second-largest employer.
Operations begin at Searles Lake
[1]AMPOT established its early business around the production of borax and potash from Searles Lake at Trona, California.
Expansion into military and industrial chemicals
[1]During World War II, the company broadened its manufacturing activities beyond its original potash and borax operations.
1950s acquisition program
[1]AMPOT acquired Eston Chemicals, Western Electrochemical, and Lindsay Chemical Company, adding facilities and extending its chemical portfolio.
Cold War ammonium perchlorate production
[1]The company supplied ammonium perchlorate for multiple United States missile systems and became part of the strategic materials supply chain.
Products and positioning
Diversified industrial and defense-chemicals manufacturer based on mineral extraction and chemical processing.
basic chemicals
Potash
Potash was one of AMPOT’s foundational products and was produced from mineral resources at Searles Lake in Trona, California. The available reference identifies potash as a core early activity but does not specify the individual compounds, grades, formulations, or customer sectors sold under the company’s operations.
basic chemicals
Borax
Borax was produced alongside potash from Searles Lake and formed part of AMPOT’s original mineral-chemical business. The source material does not provide a detailed product catalogue or identify particular commercial brands, specifications, or end uses.
propellant and defense chemicals
Ammonium perchlorate
During the Cold War, AMPOT manufactured ammonium perchlorate, an oxidizing chemical used in solid rocket propellants. The company’s production was associated with United States missile programs including Falcon, Hawk, Minuteman, Nike Zeus, Pershing, Polaris, Scout, Sergeant, and Tartar. Specific plant capacities, contracts, and product grades are not established by the available source.
specialty and inorganic chemicals
Rare-earth-related chemical products
AMPOT gained access to rare-earth-related operations when it acquired Lindsay Chemical Company, including the Rare Earths Facility in West Chicago, Illinois. The available material confirms the facility’s corporate connection but does not identify a complete list of compounds, processing methods, or branded products.
Brand decisions
1967
Kerr-McGee acquisitionM&ABackground
After decades of operation as a diversified chemical manufacturer, AMPOT became the subject of a corporate acquisition.
Action taken
Kerr-McGee purchased American Potash and Chemical Company.
Aftermath
AMPOT ceased to exist as an independent company; around 1970, its business was reorganized as Kerr-McGee Chemical Corporation.
- Diversification beyond potash and boraxStrategy
Background
AMPOT began as a Searles Lake producer of potash and borax but faced the broader industrial requirements of wartime and postwar chemical markets.
Action taken
The company expanded into additional chemical products and later used acquisitions to broaden its manufacturing and mineral-chemical activities.
Aftermath
This strategy transformed AMPOT into a diversified industrial and defense-chemicals manufacturer.
- Acquisition of chemical companies in the 1950sM&A
Background
AMPOT sought to extend its product range and operating capabilities during a period of expanding industrial and Cold War chemical demand.
Action taken
It acquired Eston Chemicals, Western Electrochemical, and Lindsay Chemical Company.
Aftermath
The acquisitions added chemical activities and brought Lindsay’s Rare Earths Facility in West Chicago, Illinois, into the company.
Sources1 sources
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