Calcium hydroxide
Drug ingredientCAS 1305-62-0
This drug ingredient has classified U.S. production volumes. EPA withholds the number as confidential business information.
US productionCBI
Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.
Import value, 2024$22M
Top sourceMexico 49%
At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.
Why supply is unknownProduction is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023.
Where It Comes From
Customs basis: HS 252220 · exact
EPA reports by year
- 2023
- US production Confidential · Imports Confidential
- 2019
- US production Confidential · Imports Confidential
Source Countries
Country of origin for US imports, from Census customs data (2024).
MX 49%MexicoDO 21%Dominican RepublicCA 18%CanadaIT 4%ItalyDE 1%Germany
- Switzerland
- Spain
- Honduras
- Guatemala
- Chile
- Hong Kong
- Israel
- India
EPA-registered manufacturers (53)
Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.
Carmeuse Holding S A · LU Luxembourg
Chemtrade Logistics · CA Canada
China National Chemical · CN China
Groupo Mexico S Ab De C V · MX Mexico
Grupo Mxico S A B De C V · MX Mexico
Show all 53
Linde Plc · IE Ireland
Nutrien · CA Canada
Rio Tinto Plc · GB United Kingdom
Airgas
Airgas Usa, Llc - Nor Pac
Americas Mining
Applied Specialties
Arizona Public Service
Arizona Public Service (Aps)
Ascent Industries
Austin White Lime
Basin Electric Power Cooperative
Befesa Holding Us
Berkshire Hathaway
Carmeuse Americas
Carmeuse Lime
Chemmasters
Chemtrade Holdco Us
Cheney Lime And Cement
Colt Refining
Duke Energy
ExxonMobil
Firstenergy
Freeport-Mcmoran
Graymont
Great River Energy
Greer Lime
Intermountain Power Agency
Lhoist North America
Linde
Minerals Technologies
Minnkota Power Cooperative, Inc Milton R. Young Station
Mississippi Lime
Nexair
Nutrien Us Top
Omnis Pleasants
Pinnacle West Capital
Pinto Valley Mining
Plum Point Energy Station
Public Service Company Of Colorado
Rio Tinto America
Salt River Project
Sandy Creek Energy Associates
Syngenta Crop Protection
Talen Energy
Tri-Chem Industries
Tri-State Generation And Transmission Association
Xcel Energy
Domestic parents -- activity not disclosed (8)
EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.
BP
Chambers Cogeneration
Halliburton Energy Service
Logan Generating Plant
Mira Dissolution Authority
Show all 8
Pete Lien & Sons
Quadra Chemicals
Vistra
EPA-registered importers (21)
Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.
Basf Se · DE Germany
Bridgestone · JP Japan
Clariant International · CH Switzerland
Drgerwerk Ag & Co Kgaa · DE Germany
Master Plant-Prod · CA Canada
Show all 21
Northern Star Resources · AU Australia
Teck Resources · CA Canada
Akdeniz Chemson Additives
Baerlocher Production
Basf
Brenntag Lubricants
Bridgestone Americas
Clariant
Draeger Medical Systems, Inc,.
Dte Energy
Faci Usa
Lanxess
Livingston International
Northern Star (Pogo)
Teck American Incorporated
Traxit North America
5 FDA-registered drug labelers
Bestmade Natural Products
Boiron
Hahnemann Laboratories, INC.
Jost Chemical Co.
Vitality Works, Inc.
Why It Matters
Sectors
HealthAgricultureFoodEnergyWaterTransportationConstructionMetals & MiningPlastics & RubberTextilesConsumer ProductsPaper & PrintingCore Chemicals
Downstream Uses
Appears in 4 drug and cosmetic product listings (FDA).
- •Calcarea Caustica
- •Para-BN
- •Bestmade Natural Products BM108
- •Cal-5-Revive
FDA Shortage Status
Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."
No FDA shortage records
Industrial Uses
Used in 32 sectors as 28 functional roles.
- •Antioxidant in Utilities (100%)Use—non-incorporative activities
- •Absorbent in Utilities (13%)Processing as a reactant
- •Absorbent in Wholesale and Retail Trade (42%)Processing as a reactant
- •Absorbent in Construction (37%)Processing as a reactant
- •Absorbent in Food, beverage, and tobacco product manufacturing (1%)Processing as a reactant
- •Absorbent in Primary Metal Manufacturing (7%)Processing as a reactant
- •pH regulating agent in Utilities (30%)Use—non-incorporative activities
- •pH regulating agent in Wholesale and Retail Trade (25%)Use—non-incorporative activities
- •pH regulating agent in Agriculture, Forestry, Fishing and Hunting (1%)Use—non-incorporative activities
- •pH regulating agent in Food, beverage, and tobacco product manufacturing (5%)Use—non-incorporative activities
- •pH regulating agent in All Other Chemical Product and Preparation Manufacturing (39%)Use—non-incorporative activities
- •Adsorbent in Primary Metal Manufacturing (0%)Processing as a reactant
- •Corrosion inhibitor in Construction (93%)Processing as a reactant
- •Filler in Non-metallic Mineral Product Manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other non-metallic mineral product manufacturing) (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Fuel in Utilities (50%)Processing as a reactant
- •Absorbent in Paper Manufacturing (82%)Processing as a reactant
- •Absorbent in Services (5%)Processing as a reactant
- •Reducing agent in Utilities (100%)Processing as a reactant
- •Lubricating agent in Petroleum Lubricating Oil and Grease Manufacturing (100%)Processing—repackaging
- •Lubricating agent in Transportation Equipment Manufacturing (100%)Use—non-incorporative activities
- •Chemical reaction regulator in Utilities (50%)Processing as a reactant
- •pH regulating agent in Other (100%)Processing as a reactant
- •Intermediate in Utilities (100%)Processing as a reactant
- •Chemical reaction regulator in Mining (except Oil and Gas) and support activities (100%)Use—non-incorporative activities
- •pH regulating agent in Construction (100%)Processing as a reactant
- •Soil amendments (fertilizers) in Agriculture, Forestry, Fishing and Hunting (100%)Processing—incorporation into article
- •pH regulating agent in Mining (except Oil and Gas) and support activities (100%)Use—non-incorporative activities
- •Intermediate in Not Known or Reasonably AscertainableProcessing—incorporation into formulation, mixture, or reaction product
- •Absorbent in Synthetic Rubber ManufacturingProcessing as a reactant
- •Absorbent in Non-metallic Mineral Product Manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other non-metallic mineral product manufacturing)Processing as a reactant
- •Absorbent in All other Petroleum and Coal Products ManufacturingProcessing as a reactant
- •Adhesion/cohesion promoter in Asphalt Paving, Roofing, and Coating Materials ManufacturingProcessing as a reactant
- •pH regulating agent in Non-metallic Mineral Product Manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other non-metallic mineral product manufacturing)Processing as a reactant
- •pH regulating agent in ServicesProcessing as a reactant
- •pH regulating agent in Primary Metal ManufacturingProcessing as a reactant
- •pH regulating agent in Paper ManufacturingProcessing as a reactant
- •Intermediate in Non-metallic Mineral Product Manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other non-metallic mineral product manufacturing)Processing—incorporation into formulation, mixture, or reaction product
- •Intermediate in All Other Chemical Product and Preparation ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
- •pH regulating agent in Synthetic Dye and Pigment ManufacturingProcessing as a reactant
- •Intermediate in Food, beverage, and tobacco product manufacturingProcessing as a reactant
- •Corrosion inhibitor in Petroleum Lubricating Oil and Grease ManufacturingProcessing as a reactant
- •pH regulating agent in Not Known or Reasonably AscertainableProcessing as a reactant
- •pH regulating agent in Pesticide, Fertilizer, and Other Agricultural Chemical Manufacturing (100%)Use—non-incorporative activities
- •Processing aids, specific to petroleum production in Oil and Gas Drilling, Extraction, and Support activities (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Diluent in Oil and Gas Drilling, Extraction, and Support activities (100%)Processing—incorporation into formulation, mixture, or reaction product
- •pH regulating agent in Oil and Gas Drilling, Extraction, and Support activities (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Lubricating agent in Soap, Cleaning Compound, and Toilet Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Adhesion/cohesion promoter in ConstructionProcessing as a reactant
- •Adsorbent in UtilitiesProcessing as a reactant
- •Binder in Asphalt Paving, Roofing, and Coating Materials ManufacturingProcessing as a reactant
- •pH regulating agent in Textiles, apparel, and leather manufacturingProcessing as a reactant
- •Fuel agents in ConstructionProcessing as a reactant
- •Soil amendments (fertilizers) in Wholesale and Retail TradeProcessing as a reactant
- •Filler in Mining (except Oil and Gas) and support activities (100%)Use—non-incorporative activities
- •Solids separation (precipitating) agent, not otherwise specified in Utilities (100%)Processing as a reactant
- •Flocculating agent in Utilities (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Flow promoter in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Absorbent in Rubber Product Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Absorbent in Petroleum Refineries (100%)Use—non-incorporative activities
- •pH regulating agent in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Intermediate in Carbon Black ManufacturingProcessing as a reactant
- •Stabilizing agent in ConstructionProcessing as a reactant
- •Filler in Asphalt Paving, Roofing, and Coating Materials ManufacturingProcessing as a reactant
- •Hardener in Asphalt Paving, Roofing, and Coating Materials ManufacturingProcessing as a reactant
- •Solids separation (precipitating) agent, not otherwise specified in Primary Metal ManufacturingProcessing as a reactant
- •Stabilizing agent in Wholesale and Retail TradeProcessing as a reactant
- •Solids separation (precipitating) agent, not otherwise specified in OtherProcessing as a reactant
- •Intermediate in Primary Metal ManufacturingProcessing as a reactant
- •Solids separation (precipitating) agent, not otherwise specified in Paper ManufacturingProcessing as a reactant
- •Intermediate in All Other Basic Inorganic Chemical Manufacturing (100%)Processing as a reactant
- •pH regulating agent in All Other Basic Organic Chemical Manufacturing (1%)Use—non-incorporative activities
- •Oxidizing agent in Pesticide, Fertilizer, and Other Agricultural Chemical Manufacturing (98%)Processing as a reactant
- •Intermediate in Rubber Product Manufacturing (100%)Processing as a reactant
- •Lubricating agent in Wholesale and Retail TradeProcessing—incorporation into formulation, mixture, or reaction product
- •Filler in All Other Basic Inorganic Chemical Manufacturing (100%)Processing as a reactant
- •Chemical reaction regulator in Primary Metal Manufacturing (100%)Processing—incorporation into article
- •Processing aids, specific to petroleum production in Wholesale and Retail TradeProcessing as a reactant
- •Soil amendments (fertilizers) in Food, beverage, and tobacco product manufacturingProcessing as a reactant
- •Intermediate in Wholesale and Retail TradeProcessing as a reactant
- •Binder in ConstructionProcessing as a reactant
- •Binder in Non-metallic Mineral Product Manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other non-metallic mineral product manufacturing)Processing as a reactant
- •pH regulating agent in Miscellaneous ManufacturingProcessing as a reactant
- •Binder in Primary Metal Manufacturing (100%)Processing—incorporation into article
- •Hardener in ConstructionProcessing as a reactant
- •Dehydrating agent (desiccant) in All Other Chemical Product and Preparation ManufacturingProcessing as a reactant
- •Softener and conditioner in UtilitiesProcessing as a reactant
- •Flocculating agent in Paper ManufacturingProcessing as a reactant
- •Sealant (barrier) in ConstructionProcessing as a reactant
- •Flux agent in Primary Metal ManufacturingProcessing as a reactant
- •Absorbent in Mining (except Oil and Gas) and support activitiesProcessing as a reactant
- •Absorbent in All Other Basic Organic Chemical ManufacturingProcessing as a reactant
- •pH regulating agent in Furniture and Related Product ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
- •Catalyst in All Other Chemical Product and Preparation ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
- •pH regulating agent in Plastics Product ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
- •pH regulating agent in Transportation Equipment ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
Chemical Identity
CAS1305-62-0
PubChem CID6093208
DTXSIDDTXSID7034410
FormulaCaH2O2
Mol. Weight74.09 g/mol
SMILES[OH-].[OH-].[Ca+2]
Data Sources
- EPA CompTox (DSSTox) · DTXSID7034410Retrieved 2026-04-06
- PubChem · compound 6093208Retrieved 2026-04-06
- EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
- FDA National Drug Code directoryRetrieved 2026-04-07
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
Calcium hydroxide (CAS 1305-62-0) https://chemicalindependence.com/chemical/1305-62-0/ EPA CompTox (DSSTox): DTXSID7034410. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID7034410 PubChem: 6093208. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6093208 EPA Chemical Data Reporting: 1305-62-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting FDA National Drug Code directory: CAS 1305-62-0. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 252220 for CAS 1305-62-0. Reporting year: 2024. https://usatrade.census.gov/