Caustic Potash Membrane Dilute Solution 45%, 48%, 50%

Occidental Chemical Corporation

Revision date : 2025-12-08

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GHS05 GHS07
Health risk rating 1
Safety risk rating 5
Environmental risk rating 1

Note: Ingredients listed on restricted chemical lists

EC/CAS

7732-18-5

Name of the chemical

Water, distilled, conductivity or of similar purity H2O

Concentration

49-90

EC/CAS

1310-58-3

Name of the chemical

potassium hydroxide

Concentration

10-51

General Information

Version

15

Revision date

2025-12-08

Product name

Caustic Potash Membrane Dilute Solution 45%, 48%, 50%

Product Synonyms

KOH; Liquid Potash; Potassium Hydroxide

Chemical name

Alkali Metal Hydroxide

1.2.1 Relevant identified uses

Intermediate in industrial manufacturing processes, such as manufacture of potassium fertilizers, potassium carbonate or other potassium salts and other

1.2.2. Uses advised against

- This product meets ANSI/AWWA B511-10 and the test requirements specified in

Icons in SDS

GHS05 GHS07 M004 M009 M010 M011 M013 M017

Company Information

company name

Occidental Chemical Corporation

e-mail address of the competent person responsible for the Safety Data Sheet

MSDS@oxy.com

GHS Information

Signal word

DANGER

Hazard Codes

Hazard statements (CLP)

H290

Hazard statements

Code

Statements

H290

May be corrosive to metals

Section 2

SECTION 2: Hazards identification

(29 CFR 1910.1200) _________________________________________________________________________________________________

Appearance/Odor

Clear liquid Odorless

Signal word

DANGER

Health hazards

CAUSES SEVERE SKIN BURNS AND EYE DAMAGE. CAUSES SERIOUS EYE DAMAGE. HARMFUL IF SWALLOWED. MAY CAUSE RESPIRATORY IRRITATION.

Physical hazards

MAY BE CORROSIVE TO METALS. Mixing with water, acid or incompatible materials may cause splattering and release of heat. Do not store in aluminum container, use aluminum fittings, or aluminum transfer lines, as aluminum will quickly corrode and flammable hydrogen gas will be generated. Accelerated corrosion can occur in areas where equipment is subjected to extremely high temperatures. Corrosive to Metals - Category 1: May be corrosive to metals GHS: CONTACT HAZARD - SKIN Category 1A - Causes severe skin burns and eye damage GHS: CONTACT HAZARD - EYE Category 1 - Causes serious eye damage GHS: ACUTE TOXICITY - ORAL Category 4 - Harmful if swallowed SPECIFIC TARGET ORGAN TOXICITY (STOT) - SINGLE - Category 3 - May cause respiratory tract irritation EXPOSURE (SE) UNKNOWN ACUTE TOXICITY Unknown Acute Oral Toxicity 100% of this product consists of ingredient(s) of known acute oral toxicity Unknown Acute Dermal Toxicity There is no acute dermal toxicity data available for this material. Potassium hydroxide is a corrosive substance at concentrations of about 2% and higher. For this reason, there is no need for further acute toxicity testing Unknown Acute Inhalation Toxicity There is no acute inhalation toxicity data available for this material. Potassium hydroxide is a corrosive substance at concentrations of about 2% and higher. For this reason, there is no need for further acute toxicity testing GHS SYMBOL: Corrosive, Exclamation mark GHS SIGNAL WORD: DANGER GHS HAZARD STATEMENTS GHS - Physical Hazard Statement(s) May be corrosive to metals GHS - Health Hazard Statement(s) Harmful if swallowed Causes severe skin burns and eye damage May cause respiratory irritation GHS - Precautionary Statement(s) - Prevention Keep only in original container or container compatible with product (see Section 7 - Safe Storage Conditions) Do not breathe dust, fumes, gas, mist, vapors, or spray Wash hands and exposed skin thoroughly after handling. Do not touch eyes Do not eat, drink, or smoke when using this product Use only outdoors or in a well-ventilated area Wear protective gloves, protective clothing, eye, and face protection GHS - Precautionary Statement(s) - Response IF SWALLOWED: Get medical help IF SWALLOWED: Rinse mouth. Do NOT induce vomiting IF INHALED: Get medical help if you feel unwell IF INHALED: Remove person to fresh air and keep comfortable for breathing IF ON SKIN: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes Wash contaminated clothing before reuse IF ON SKIN: Get emergency medical help immediately IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do Continue rinsing IF IN EYES: Get medical help Specific treatment for skin or eye contact (see "Notes to Physician" in Section 4 of the SDS) Absorb spillage to prevent material damage GHS - Precautionary Statement(s) - Storage Store in a well-ventilated place. Keep container tightly closed Store locked up Store in corrosive resistant container with a resistant inner liner (NOTE: flammable hydrogen gas may be generated if aluminum container and/or aluminum fittings are used with dissolved material) Not Mentioned in GHS Classification • Mixing with water or other low pH material may cause splattering and/or an exothermic reaction • May be corrosive to metals when wet (material will absorb moisture from atmosphere) • Do not store in aluminum container or use aluminum fittings or transfer lines, as flammable hydrogen gas will be generated • Accelerated corrosion can occur in areas where equipment is subjected to extremely high temperatures Persistent, Bioaccumulative, and Toxic (PBT) and Very Persistent and Very Bioaccumulative (vPvB) Assessment: This product does not fulfill the criteria for persistence, bioaccumulation, and toxicity. Therefore, this substance is not considered a PBT or a vPvB substance. Component U.S. - CERCLA/SARA - Section EU - PBT / vPvB Status 313 - PBT Chemical Listing Potassium hydroxide Not listed PBT/PvBT assessment does not apply Considered not to be an EU PBT Endocrine Disruptor Assessment: This product nor any of its ingredients which may be present at a concentration equal to or greater than 0.1 wt.% by weight are included in the lists established in accordance with Article 59(1) of Regulation (EU) 2020/878 [as having endocrine disrupting properties]; therefore, this substance shall not be identified as having endocrine disrupting properties. Component Endocrine Screening List

Precautionary statements

Keep only in original container or container compatible with product (see Section 7 - Safe Storage Conditions). Do not breathe dusts or mists. Wash hands and exposed skin thoroughly after handling. Do not touch eyes. Do not eat, drink, or smoke when using this product. Wear protective gloves, protective clothing, eye, and face protection. Use only outdoors or in a well-ventilated area. Absorb / collect spillage to prevent material damage. - Disposal • Dispose of contents and container in accordance with applicable local, regional, national, and/or international regulations

Additional information

Toxicity may be delayed and may not be readily visible. Significant exposures must be referred for medical attention immediately. There is no specific antidote. HAZARD CLASSIFICATION

2.1 Classification of the substance or mixture

GHS: PHYSICAL HAZARDS: - Corrosive to Metals - Category 1: May be corrosive to metals GHS: CONTACT HAZARD - SKIN: Category 1A - Causes severe skin burns and eye damage GHS: CONTACT HAZARD - EYE: Category 1 - Causes serious eye damage GHS: ACUTE TOXICITY - ORAL: Category 4 - Harmful if swallowed SPECIFIC TARGET ORGAN TOXICITY (STOT) - SINGLE - Category 3 - May cause respiratory tract irritation EXPOSURE (SE): UNKNOWN ACUTE TOXICITY: Unknown Acute Oral Toxicity: 100% of this product consists of ingredient(s) of known acute oral toxicity. Unknown Acute Dermal Toxicity: There is no acute dermal toxicity data available for this material. Potassium hydroxide is a corrosive substance at concentrations of about 2% and higher. For this reason, there is no need for further acute toxicity testing. Unknown Acute Inhalation Toxicity: There is no acute inhalation toxicity data available for this material. Potassium hydroxide is a corrosive substance at concentrations of about 2% and higher. For this reason, there is no need for further acute toxicity testing. GHS SYMBOL: Corrosive, Exclamation mark GHS SIGNAL WORD: DANGER GHS HAZARD STATEMENTS: GHS - Physical Hazard Statement(s) • May be corrosive to metals GHS - Health Hazard Statement(s) • Harmful if swallowed • Causes severe skin burns and eye damage • May cause respiratory irritation

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