Potassium Hydroxide 45%  Product identifier

Trade name: Potassium Hydroxide 45% Solution

SKU: RLS-SOL-P201

Details of the supplier of the safety data sheet

Manufacturer/Supplier:

RLS Chemicals

32 Main Reef Road

Benrose, Johannesburg

2094

Emergency telephone number:

Spill Tech: 086 100 0366

Emergency: 010 448 3426

 

• Classification of the substance or mixture

Corrosive to Metals 1 H290 May be corrosive to metals.

Skin Corrosion 1A H314 Causes severe skin burns and eye damage.

Acute Toxicity – Oral 4 H302 Harmful if swallowed.

• Label elements

GHS label elements The product is classified and labeled according to the Globally Harmonized System (GHS).

• Hazard pictograms

Signal word Danger

• Hazard-determining components of labeling:

Potassium Hydroxide

• Hazard statements

May be corrosive to metals. Harmful if swallowed.

Causes severe skin burns and eye damage.

(Contd. on page 2)

1 Identification

2 Hazard(s) identification

 

Potassium Hydroxide 45%  Safety Data Sheet

acc. to OSHA HCS

Printing date 13/05/2025 Reviewed on 13/05/2025

Trade name: Potassium Hydroxide 45% Solution

59.1.18

Precautionary statements

Keep only in original container. Do not breathe dusts or mists. Wash thoroughly after handling.

Do not eat, drink or smoke when using this product.

Wear protective gloves/protective clothing/eye protection/face protection. If swallowed: Call a poison center/doctor if you feel unwell.

If swallowed: Rinse mouth. Do NOT induce vomiting.

If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove person to fresh air and keep comfortable for breathing.

If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Immediately call a poison center/doctor. Specific treatment (see on this label).

Wash contaminated clothing before reuse. Absorb spillage to prevent material damage. Store locked up.

Store in corrosive resistant container with a resistant inner liner.

Dispose of contents/container in accordance with local/regional/national/international regulations.

Potassium Hydroxide 45%  Classification system:

NFPA ratings (scale 0 – 4)

Other hazards

Results of PBT and vPvB assessment

PBT: Not applicable.

vPvB: Not applicable.

Chemical characterization: Mixtures

Description: Mixture of the substances listed below with nonhazardous additions.

3 Composition/information on ingredients

• Dangerous components:

CAS: 1310-58-3

Potassium Hydroxide

44.7% – 45.3%

• Table of Nonhazardous Ingredients

CAS: 7732-18-5

Water

55.3% – 54.7%

(Contd. on page 3)

Page 3/10

Safety Data Sheet

acc. to OSHA HCS

Printing date 13/05/2025 Reviewed on 13/05/2025

Trade name: Potassium Hydroxide 45% Solution

59.1.18

Description of first aid measures

General information:

Immediately remove any clothing soiled by the product.

Symptoms of poisoning may even occur after several hours; therefore medical observation for at least 48 hours after the accident.

After inhalation: In case of unconsciousness place patient stably in side position for transportation.

After skin contact: Immediately wash with water and soap and rinse thoroughly.

After eye contact: Rinse opened eye for several minutes under running water. Then consult a doctor.

After swallowing:

Immediately call a doctor.

Drink copious amounts of water and provide fresh air. Immediately call a doctor.

Information for doctor:

Most important symptoms and effects, both acute and delayed No further relevant information available.

Indication of any immediate medical attention and special treatment needed

No further relevant information available.

Extinguishing media

Suitable extinguishing agents: Use fire fighting measures that suit the environment.

Special hazards arising from the substance or mixture

During heating or in case of fire poisonous gases are produced.

Advice for firefighters

Protective equipment: Mouth respiratory protective device.

 

4 First-aid measures

5 Fire-fighting measures

6 Accidental release measures

• Personal precautions, protective equipment and emergency procedures

Mount respiratory protective device.

Wear protective equipment. Keep unprotected persons away.

• Environmental precautions:

Dilute with plenty of water.

Do not allow to enter sewers/ surface or ground water.

• Methods and material for containment and cleaning up:

Absorb with liquid-binding material (sand, diatomite, acid binders, universal binders, sawdust). Use neutralizing agent.

Dispose contaminated material as waste according to section 13. Ensure adequate ventilation.

• Reference to other sections

See Section 7 for information on safe handling.

See Section 8 for information on personal protection equipment. See Section 13 for disposal information.

• Protective Action Criteria for Chemicals
• PAC-1:

CAS: 1310-58-3

Potassium Hydroxide

0.18 mg/m³

• PAC-2:

CAS: 1310-58-3

Potassium Hydroxide

2 mg/m³

(Contd. on page 4)

Page 4/10

Safety Data Sheet

acc. to OSHA HCS

Printing date 13/05/2025 Reviewed on 13/05/2025

Trade name: Potassium Hydroxide 45% Solution

(Contd. of page 3)

(Contd. on page 5)

59.1.18

Potassium Hydroxide 45%  Handling:

Precautions for safe handling

Ensure good ventilation/exhaustion at the workplace. Prevent formation of aerosols.

Information about protection against explosions and fires: Keep respiratory protective device available.

Conditions for safe storage, including any incompatibilities

Storage:

Requirements to be met by storerooms and receptacles: No special requirements.

Information about storage in one common storage facility: Not required.

Further information about storage conditions: Keep receptacle tightly sealed.

Specific end use(s) No further relevant information available.

• PAC-3:

CAS: 1310-58-3

Potassium Hydroxide

54 mg/m³

7 Handling and storage

*

Additional information about design of technical systems: No further data; see section 7.

• Control parameters
• Components with limit values that require monitoring at the workplace:

CAS: 1310-58-3 Potassium Hydroxide

REL

TLV

Ceiling limit value: 2 mg/m³

Ceiling limit value: 2 mg/m³

Additional information: The lists that were valid during the creation were used as basis.

Exposure controls

Personal protective equipment:

General protective and hygienic measures:

Keep away from foodstuffs, beverages and feed. Immediately remove all soiled and contaminated clothing. Wash hands before breaks and at the end of work.

Avoid contact with the eyes and skin.

• Breathing equipment:

In case of brief exposure or low pollution use respiratory filter device. In case of intensive or longer exposure use respiratory protective device that is independent of circulating air.

• Protection of hands:

The glove material has to be impermeable and resistant to the product/ the substance/ the preparation.

Due to missing tests no recommendation to the glove material can be given for the product/ the preparation/ the chemical mixture.

Selection of the glove material on consideration of the penetration times, rates of diffusion and the degradation 8 Exposure controls/personal protection

 

 

acc. to OSHA HCS

Printing date 13/05/2025 Reviewed on 13/05/2025

Trade name: Potassium Hydroxide 45% Solution

(Contd. of page 4)

(Contd. on page 6)

59.1.18

*

Information on basic physical and chemical properties

General Information

Appearance:

Form: Solution

Color: Clear

Odor: Odorless

Odor threshold: Not determined.

• pH-value at 20 °C (68 °F):

12-14

• Change in condition

Melting point/Melting range: Boiling point/Boiling range:

Undetermined.

Min. 112°C

• Flash point:

Not applicable.

• Flammability:

Not applicable.

• Decomposition temperature:

Not determined.

• Ignition temperature:

Product is not selfigniting.

• Danger of explosion:

Product does not present an explosion hazard.

• Explosion limits: Lower:

Upper:

Not determined. Not determined.

• Vapor pressure at 20 °C (68 °F):

23 hPa (17.3 mm Hg)

Density at 20 °C (68 °F):

Relative density

Vapor density

Evaporation rate

Min. 1.45g/cm³

Not determined.

Not determined. Not determined.

• Solubility in / Miscibility with Water:

Fully miscible.

• Partition coefficient (n-octanol/water): Not determined.

Material of gloves

The selection of the suitable gloves does not only depend on the material, but also on further marks of quality and varies from manufacturer to manufacturer. As the product is a preparation of several substances, the resistance of the glove material can not be calculated in advance and has therefore to be checked prior to the application.

Penetration time of glove material

The exact break through time has to be found out by the manufacturer of the protective gloves and has to be observed.

Eye protection:

Body protection: Protective work clothing 9 Physical and chemical properties

 

Safety Data Sheet

acc. to OSHA HCS

Printing date 13/05/2025 Reviewed on 13/05/2025

Trade name: Potassium Hydroxide 45% Solution

(Contd. of page 5)

59.1.18

Reactivity No further relevant information available.

Chemical stability

Thermal decomposition / conditions to be avoided: No decomposition if used according to specifications.

Possibility of hazardous reactions No dangerous reactions known.

Conditions to avoid No further relevant information available.

Incompatible materials: No further relevant information available.

Hazardous decomposition products: No dangerous decomposition products known.

Information on toxicological effects

Acute toxicity:

Primary irritant effect:

on the skin: Strong caustic effect on skin and mucous membranes.

on the eye: Strong caustic effect.

Sensitization: No sensitizing effects known.

Additional toxicological information:

The product shows the following dangers according to internally approved calculation methods for preparations: Harmful

Corrosive

Swallowing will lead to a strong caustic effect on mouth and throat and to the danger of perforation of esophagus and stomach.

Carcinogenic categories

• Viscosity: Dynamic: Kinematic:

Not determined. Not determined.

• Other information

No further relevant information available.

10 Stability and reactivity

*

• LD/LC50 values that are relevant for classification:

ATE (Acute Toxicity Estimate)

Oral

LD50

1,111 mg/kg

• IARC (International Agency for Research on Cancer)

None of the ingredients is listed.

• NTP (National Toxicology Program)

None of the ingredients is listed. 11 Toxicological information

Safety Data Sheet

acc. to OSHA HCS

Printing date 13/05/2025 Reviewed on 13/05/2025

Trade name: Potassium Hydroxide 45% Solution

(Contd. of page 5)

59.1.18

Waste treatment methods

Recommendation:

Must not be disposed of together with household garbage. Do not allow product to reach sewage system.

Uncleaned packagings:

Recommendation: Disposal must be made according to official regulations.

Recommended cleansing agent: Water, if necessary with cleansing agents.

(Contd. on page 8)

• OSHA-Ca (Occupational Safety & Health Administration)

None of the ingredients is listed.

*

13 Disposal considerations

*

UN-Number

DOT, IMDG, IATA UN1814

UN proper shipping name

DOT Potassium hydroxide, solution

IMDG, IATA POTASSIUM HYDROXIDE SOLUTION

Toxicity

Aquatic toxicity: No further relevant information available.

Persistence and degradability No further relevant information available.

Behavior in environmental systems:

Bioaccumulative potential No further relevant information available.

Mobility in soil No further relevant information available.

Additional ecological information:

General notes:

Water hazard class 1 (Self-assessment): slightly hazardous for water

Do not allow undiluted product or large quantities of it to reach ground water, water course or sewage system. Must not reach bodies of water or drainage ditch undiluted or unneutralized.

Rinse off of bigger amounts into drains or the aquatic environment may lead to increased pH-values. A high pH- value harms aquatic organisms. In the dilution of the use-level the pH-value is considerably reduced, so that after the use of the product the aqueous waste, emptied into drains, is only low water-dangerous.

Results of PBT and vPvB assessment

PBT: Not applicable.

vPvB: Not applicable.

Other adverse effects No further relevant information available. 12 Ecological information

14 Transport information

 

Safety Data Sheet

acc. to OSHA HCS

Printing date 13/05/2025 Reviewed on 13/05/2025

Trade name: Potassium Hydroxide 45% Solution

(Contd. of page 5)

59.1.18

Transport hazard class(es)

DOT

Class

Label

8 Corrosive substances

8

IMDG, IATA

}

Class

Label

8 Corrosive substances

8

Packing group

DOT, IMDG, IATA

II

Environmental hazards:

Marine pollutant:

No

Special precautions for user Warning: Corrosive substances

Hazard identification number (Kemler code): 80

EMS Number: F-A,S-B

Segregation groups (SGG18) Alkalis

Stowage Category A

Segregation Code SG35 Stow “separated from” SGG1-acids

• Transport in bulk according to Annex II of MARPOL73/78 and the IBC Code

Not applicable.

Transport/Additional information:

DOT

Quantity limitations

On passenger aircraft/rail: 1 L On cargo aircraft only: 30 L

IMDG

Limited quantities (LQ)

Excepted quantities (EQ)

1L

Code: E2

Maximum net quantity per inner packaging: 30 ml Maximum net quantity per outer packaging: 500 ml

• UN “Model Regulation”:

UN 1814 POTASSIUM HYDROXIDE SOLUTION, 8, II

*

• Safety, health and environmental regulations/legislation specific for the substance or mixture

No further relevant information available.

(Contd. on page 9)

15 Regulatory information

 

Safety Data Sheet

acc. to OSHA HCS

Printing date 13/05/2025 Reviewed on 13/05/2025

Trade name: Potassium Hydroxide 45% Solution

59.1.18

• Sara
• Section 355 (extremely hazardous substances):

None of the ingredients is listed.

• Section 313 (Specific toxic chemical listings):

None of the ingredients is listed.

• TSCA (Toxic Substances Control Act):

Water

ACTIVE

Potassium Hydroxide

ACTIVE

• Hazardous Air Pollutants

None of the ingredients is listed.

• Proposition 65
• Chemicals known to cause cancer:

None of the ingredients is listed.

• Chemicals known to cause reproductive toxicity for females:

None of the ingredients is listed.

• Chemicals known to cause reproductive toxicity for males:

None of the ingredients is listed.

• Chemicals known to cause developmental toxicity:

None of the ingredients is listed.

• Carcinogenic categories
• EPA (Environmental Protection Agency)

None of the ingredients is listed.

• TLV (Threshold Limit Value)

None of the ingredients is listed.

• NIOSH-Ca (National Institute for Occupational Safety and Health)

None of the ingredients is listed.

GHS label elements The product is classified and labeled according to the Globally Harmonized System (GHS).

• Hazard pictograms

Signal word Danger

• Hazard-determining components of labeling:

Potassium Hydroxide

• Hazard statements

May be corrosive to metals. Harmful if swallowed.

Causes severe skin burns and eye damage.

• Precautionary statements

Keep only in original container. Do not breathe dusts or mists. Wash thoroughly after handling.

Do not eat, drink or smoke when using this product.

Safety Data Sheet

acc. to OSHA HCS

Printing date 13/05/2025 Reviewed on 13/05/2025

Trade name: Potassium Hydroxide 45% Solution

59.1.18

*

This information is based on our present knowledge. However, this shall not constitute a guarantee for any specific product features and shall not establish a legally valid contractual relationship.

Department issuing SDS: Environment protection department.

• Date of preparation / last revision

Creation date for SDS: 09/03/2024

Revision 1.0, 13/05/2025

 

Wear protective gloves/protective clothing/eye protection/face protection. If swallowed: Call a poison center/doctor if you feel unwell.

If swallowed: Rinse mouth. Do NOT induce vomiting.

If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove person to fresh air and keep comfortable for breathing.

If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Immediately call a poison center/doctor. Specific treatment (see on this label).

Wash contaminated clothing before reuse. Absorb spillage to prevent material damage. Store locked up.

Store in corrosive resistant container with a resistant inner liner.

Dispose of contents/container in accordance with local/regional/national/international regulations.

• Chemical safety assessment: A Chemical Safety Assessment has not been carried out. 16 Other information