Magnesium hydroxide
Drug ingredientCAS 1309-42-8
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 30%
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 281610 · 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 30%MexicoNL 27%NetherlandsIL 27%IsraelAT 9%AustriaJP 5%Japan
- Italy
- Germany
- Spain
- Ireland
- Brazil
- United Kingdom
- South Korea
- Canada
- Singapore
- India
EPA-registered manufacturers (12)
Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.
Arizona Public Service
Arizona Public Service (Aps)
Duke Energy
Firstenergy
Freeport-Mcmoran
Show all 12
Honda Development & Manufacturing Of America
Magpro
Martin Marietta Materials
Metals And Additives
Nalco- An Ecolab
Omnis Pleasants
Salt River Project
Domestic parents -- activity not disclosed (4)
EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.
Basf
Icl Specialty Products North America
Tetra Technologies
Vistra
EPA-registered importers (8)
Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.
Borealis Ag · AT Austria
Mitsubishi Chemical Group · JP Japan
Avient
Borealis Compounds
Cht Usa
Show all 8
Jm Huber
Mitsubishi Chemical America
The Hallstar
97 FDA-registered drug labelers
A-S Medication Solutions
Aeroflex Industria de Aerosol Ltda
Amazon.com Services LLC
American Health Packaging
American Sales Company
Amerisource Bergen
AMERISOURCEBERGEN DRUG CORPORATION
ATLANTIC BIOLOGICALS CORP.
Atlantis Consumer Healthcare, Inc.
Aurobindo Pharma Limited
Bayer HealthCare LLC.
Belleview Bioscience LLC
Belleview Biosciences LLC
Belmora LLC
BEST CHOICE (VALU MERCHANDISERS COMPANY)
BETTER LIVING BRANDS LLC
C.B. Fleet Company, Inc.
CARDINAL HEALTH
Cardinal Health 107, LLC
Cardinal Health 110, LLC. dba Leader
CHAIN DRUG CONSORTIUM, LLC
Chain Drug Marketing Association
Chain Drug Marketing Association Inc.
Chattem, Inc.
CVS
CVS PHARMACY
CVS PHARMACY,INC.
DEAD SEA PERICLASE
DISCOUNT DRUG MART
Discount Drug Mart, Inc
DOLGENCORP, INC.
DOLGENCORP, LLC
Elementis Pharma Gmbh
Everpharm LLC
Fact Products
FAMILY DOLLAR SERVICES INC
FORTUNE PHARMACAL COMPANY LIMITED
GERI-CARE PHARMACEUTICALS, CORP
GOOD SENSE
H E B
Harris Teeter, LLC
Hebei Meishen Technology Co., Ltd
Humco Holding Group, Inc.
HyVee Inc
INFIRST HEALTHCARE INC.
JC World Bell Wholesale Co., Inc.
Kenvue Brands LLC
Kesin Pharma Corporation
KROGER COMPANY
L. Perrigo Company
Lil' Drug Store Products, Inc.
Major Pharmaceuticals
MAJOR Pharmaceuticals Inc.
McKesson Corporation dba SKY Packaging
Meijer
MEIJER DISTRIBUTION INC
MEIJER, INC.
Morning Star OTC
Navajo Manufacturing Company Inc
NuCare Pharmaceuticals, Inc.
PADARSH PHARMACEUTICALS PVT. LTD
PAI Holdings, LLC
PAI Holdings, LLC dba PAI Pharma
Pharmacy Value Alliance LLC
Power Health, Products, Inc.
Preferred Pharmaceuticals Inc.
Proficient Rx LP
Publix
Publix Super Markets Inc
R J General Corporation
Retail Business Services, LLC.
Rising Pharma Holdings, Inc.
Rite Aid Corporation
RITE AID PHARMACY
RUGBY LABORATORIES
Safeway
Sato Pharmaceutical Co., Ltd.
SPI PHARMA
SPI PHARMA Inc.
STRATEGIC SOURCING SERVICES LLC
Target Corporation
THE PROCTER & GAMBLE MANUFACTURING COMPANY
TOP CARE (TOPCO ASSOCIATES LLC)
Topco Associates LLC
UNITED NATURAL FOODS, INC. DBA UNFI
Uriel Pharmacy Inc.
VALU MERCHANDISERS COMPANY
Vasundhara Rasayans Limited
WAL-MART STORES, INC.
Walgreen
WALGREEN CO.
WALGREEN COMPANY
Walgreens
WALGREENS CO.
Walmart
WALMART INC.
WellSpring Pharmaceutical Corporation
Why It Matters
Sectors
FoodPlastics & RubberPaper & PrintingCore ChemicalsHealthEnergyMetals & MiningWaterAgricultureConstruction
Downstream Uses
Appears in 141 drug and cosmetic product listings (FDA).
- •CareOne Milk of Magnesia Cherry
- •Regular Strength Antacid/Antigas
- •MILK OF Magnesia
- •Meijer Magnesium Hydroxide Laxative Soft Chew
- •Maximum Strength Antacid and Antigas
- •acid reducer plus antacid
- •Good Sense Dual Action Complete
- •Melox
Show all 141
- •Mag-AL Plus
- •MILK OF Magnesia MINT
- •maximum strength antacid cherry
- •Multi Symptom Antacid Berry Flavor
- •Equate Acid Reducer Complete
- •Inon Ace
- •Aluminum Hydroxide, Magnesium Hydroxide and Simethicone
- •Gentle Laxative
- •Phillips Original MILK OF Magnesia
- •Maximum Strength Antacid AND Antigas Cherry
- •Pepcid Complete, Travel Basix
- •Mintox Maximum Strength
- •Antacid MINT
- •Antacid Antigas
- •Rolaids MAX Strength 1500
- •Dual Action Complete
- •Maximum Strength Antacid
- •topcare dual action complete
- •Regular Strength Antacid Mint
- •Dulcolax Liquid
- •Meijer Extra Strength Freshmint Flavor
- •Good Neighbor Pharmacy Dual Action Complete
- •GERI-Lanta Antacid
- •Pepcid Complete
- •Maximum Strength Advanced Antacid
- •MILK OF Magnesia Original
- •Phillips Milk Of Magnesia Wild Cherry
- •Premier Value Extra Strength Freshmint Flavor
- •Walgreens Blueberry Raspberry Gentle Laxative
- •Rolaids Multi-Symptom Advanced Antacid plus Anti-gas Wild Berry
- •Walgreens Childrens Saline Laxative
- •MILK OF Magnesia Cherry
- •CVS Health Childrens Saline Laxative
- •Maximum Strength Antacid Antigas
- •Kesin MAG-AL Plus
- •Antacid
- •acid reducer complete
- •Rolaids Advanced Antacid Anti-gas Mixed Berry
- •complete dual action
- •Aurum Hypericum
- •Antacid AND Gasrelief
- •CVS Magnesium Hydroxide Laxative Chew
- •GERI-MOX MAX Cherry
- •Antacid AND Antigas
- •Best Choice Extra Strength Berry Flavor
- •GERI-Lanta Maximum Strength
- •Regular Strength Antacid
- •Maximum Strength Antacid MINT
- •leader acid reducer complete
- •Equate Kids Gentle Laxative SC
- •Aluminum Hydroxide, Magnesium Hydroxide and Simethicone Suspension
- •Regular Strength Antacid AND GAS Relief
- •injoy heartburn relief
- •Mag-AL Plus XS
- •CareOne Acid Reducer Complete
- •Maximum Strength Antacid AND Gasrelief
- •Multi Symptom Antacid
- •Supreme Antacid
- •Mylanta Classic
- •Mylanta One Antacid/Anti-Gas
- •Gelusil
- •Heartburn Plus Gas Relief Chewable Multi Symptom
- •Rolaids Ultra Strength Antacid Assorted Fruit
- •Rolaids Ultra Strength Mint
- •Bem Bio Antiperspirant floral
- •Bem Bio Antiperspirant original
- •UP AND UP DUAL Action ACID Reducer Antacid
- •MiraFAST soft chews
- •Extra Strength Antacid Freshmint
- •Supreme Antacid Cherry
- •DG Health Liquid Antacid plus Anti Gas
- •DG Health acid reducer complete
- •KO-Lanta
- •Mylanta Maximum Strength Vanilla Caramel Flavor
- •Mylanta Vanilla Caramel
- •foster and thrive acid reducer antacid
- •Bem Bio Antiperspirant sea breeze
- •Rolaids Original
- •Mag-AL Liquid
- •Antacid Antigas NTA
- •Childrens Oral Saline Laxative
- •GERI-Lanta Supreme Cherry
- •GERI-Lanta Antacid Antigas
- •GERI-MOX Antacid Antigas
- •Premier Value Milk of Magnesia
- •Almacone Double Strength
- •Bem Bio Antiperspirant forest trails
- •Kesin MAG-AL Plus XS
- •Rolaids Ultra Strength 1200
- •Mintox Plus Tabs
- •Maximum Strength Antacid Cherry liquid
- •Rolaids Advanced Antacid Anti-gas Wild Berry
- •Hepar Magnesium 8X
- •Mylanta Maximum Strength Classic Flavor
- •Best Choice Extra Strength
- •Premier Value Multi Symptom Antacid Berry Flavor
- •Walgreen Liquid Antacid
- •Walgreens SmoothLAX Soft Chews
- •Regular Strength Antacid AND Antigas
- •Kesin MAG-AL
- •QCH Regular Strength Antacid 509
- •DUAL Action Pepcid Complete
- •Pedia-Lax
- •Dulcolax Chewy Bites Assorted Fruits
- •Dulcolax Chewy Fruit Bites Cherry Berry
- •Dulcolax Soft Chews Mixed Berry
- •Advanced Antacid MINT
- •Aluminum Hydroxide, Magnesium Hydroxide, and Dimethicone
- •Phillips Fresh MINT MILK OF Magnesia
- •Colace Fast-Acting Saline Laxative
- •Careone Milk of magnesia Original Milk of Magnesia Original
- •Bem Bio Antiperspirant unscented
- •QCH Maximum Strength Antacid 516
- •Milk of Magnesia Concentrate
- •Rolaids Extra Strength Mint
- •Rolaids Extra Strength Fruit
- •Rolaids Ultra Strength Antacid Strawberry
- •Hepar Magnesium 4
- •Magsil Antacid (Lemon MINT)
- •Mylanta Coat and Cool
- •Rolaids Advanced Antacid plus Anti-Gas Soft Chews
- •Humco Milk of Magnesia
- •Basic Care Dual Action Complete
- •Equate Gentle Laxative Soft chew
- •Up and Up Dual Action Acid Reducer and Antacid
- •Rolaids Heartburn plus Gas
- •Signature Care Acid Reducer Complete
- •Antacid Plus
- •equaline complete dual action
- •Dulcolax Soft Chews Watermelon
- •Mylanta New Tonight Soothing Honey Chamomile
- •Advanced Regular Strength Antacid
- •Rolaids Extra Strength Antacid Mint
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 16 sectors as 14 functional roles.
- •Antioxidant in Utilities (100%)Use—non-incorporative activities
- •Intermediate in Utilities (100%)Processing as a reactant
- •Flame retardant in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Soil amendments (fertilizers) in Agriculture, Forestry, Fishing and Hunting (100%)Use—non-incorporative activities
- •pH regulating agent in Mining (except Oil and Gas) and support activities (100%)Use—non-incorporative activities
- •Flame retardant in Plastics Product Manufacturing (100%)Processing—incorporation into article
- •pH regulating agent in Food, beverage, and tobacco product manufacturing (10%)Processing as a reactant
- •Intermediate in All Other Basic Inorganic Chemical Manufacturing (4%)Processing as a reactant
- •Fuel agents in Utilities (3%)Processing as a reactant
- •pH regulating agent in All Other Chemical Product and Preparation Manufacturing (10%)Processing as a reactant
- •pH regulating agent in Fabricated Metal Product Manufacturing (3%)Processing as a reactant
- •pH regulating agent in Utilities (30%)Processing as a reactant
- •Flame retardant in All Other Chemical Product and Preparation ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
- •Absorbent in Plastics Material and Resin ManufacturingProcessing—incorporation into article
- •Reducing agent in Utilities (100%)Processing as a reactant
- •Lubricating agent in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •CBI in CBICBI
- •Soil amendments (fertilizers) in Pesticide, Fertilizer, and Other Agricultural Chemical ManufacturingNot Known or Reasonably Ascertainable
- •Corrosion inhibitor in All Other Basic Inorganic Chemical Manufacturing (3%)Use—non-incorporative activities
- •Corrosion inhibitor in Wood Product Manufacturing (21%)Use—non-incorporative activities
- •Corrosion inhibitor in Services (1%)Use—non-incorporative activities
- •Corrosion inhibitor in Food, beverage, and tobacco product manufacturing (75%)Use—non-incorporative activities
- •Corrosion inhibitor in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Processing aids, specific to petroleum production in Petroleum Refineries (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Filler in Plastics Material and Resin Manufacturing (100%)Use—non-incorporative activities
- •Flux agent in Primary Metal Manufacturing (100%)Use—non-incorporative activities
- •Filler in Not Known or Reasonably AscertainableProcessing—incorporation into formulation, mixture, or reaction product
Chemical Identity
CAS1309-42-8
PubChem CID73981
DTXSIDDTXSID4049662
FormulaH2MgO2
Mol. Weight58.32 g/mol
SMILES[OH-].[OH-].[Mg+2]
Data Sources
- EPA CompTox (DSSTox) · DTXSID4049662Retrieved 2026-04-06
- PubChem · compound 73981Retrieved 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
Magnesium hydroxide (CAS 1309-42-8) https://chemicalindependence.com/chemical/1309-42-8/ EPA CompTox (DSSTox): DTXSID4049662. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4049662 PubChem: 73981. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/73981 EPA Chemical Data Reporting: 1309-42-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting FDA National Drug Code directory: CAS 1309-42-8. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 281610 for CAS 1309-42-8. Reporting year: 2024. https://usatrade.census.gov/