<< GE00738 SODIUM HYDROXIDE SOLUTION 48% >>

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Safety Data Sheet
1. Chemical product and company identification
Product name: SODIUM HYDROXIDE SOLUTION 48%Company information
Name of manufacturer
Address
Name of section
Telephone number
Facsimile number
Mail address
Reference No： KANTO CHEMICAL CO., INC.
： 2-1, Nihonbashi, Muromachi 2-Chome, Chuo-Ku, Tokyo, 103-0022, Japan： Electronic materials division technical department： +81-3-6214-1080： +81-3-3241-1043： el-info@kanto.co.jp: GE00738 1.4

Recommended uses andrestrictions: Electronic chemicals

2. Hazards identification
GHS classification
Health hazards

Environmentalhazards

Skin corrosion/irritation

Category 1B

Serious eye damage/eyeirritation

Category 1

Specific target organ toxicity(single exposure)

Category 1 (respiratory organs)

Aquatic acute

Category 3

Hazardpictograms

Signal word:

DangerHazard statements:

Causes severe skin burns and eye damage
Causes damage to organs (respiratory organs)
Harmful to aquatic life

Prevention:

Do not breathe mist/vapors.
Wash hands, forearms and face thoroughly after handling.
Do not eat, drink or smoke when using this product.
Avoid release to the environment.
Wear protective gloves/protective clothing/eye protection/faceprotection.

Response:IF SWALLOWED: Rinse mouth. Do not induce vomiting.
IF ON SKIN (or hair): Take off immediately all contaminatedclothing. Rinse skin with water .
IF INHALED: Remove person to fresh air and keep comfortable forbreathing.
IF IN EYES: Rinse cautiously with water for several minutes.
Remove contact lenses, if present and easy to do. Continue
rinsing.

Precautionary statements

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IF exposed or concerned: Call a POISON CENTER or doctor.
Immediately call a POISON CENTER or doctor.
Storage:

Store locked up.

Disposal:

Dispose of contents/container to hazardous or special waste
collection point, in accordance with local, regional, national
and/or international regulation.

3. Composition/information on ingredients
Distinction of substance ormixture
Chemical name
Sodium hydroxide:

MixtureConcentration (%)
48FormulaNaOH

TSCA
ListedEC-No.
215-185-5

CAS RN
1310-73-2

4. First aid measures
First aid measures
First-aid measures afterinhalation:

Remove the victim to fresh air, and make him blow his nose andgargle.

First-aid measures after skincontact:

Wash the affected areas under running water, get medical
treatment as soon as possible.

First-aid measures after eye
contact:

Wash the affected areas under running water for at least 15
minutes. Get medical treatment.

First-aid measures afteringestion:

Rinse mouth with water. Give the victim one or two glasses ofwater or milk. Do not induce vomiting. Get medical treatment assoon as possible.

Personal Protection in FirstAid and Measures:

Rescuers should wear proper protective equipment like rubber
gloves, goggles.

:

Inhalation brings on burning sensation of throat, throat pain,
cough, breathlessness, and these symptoms may delay. Skin contact
causes redness, pain, severe skin burns, and blisters. Eyecontact causes redness, pain, and blurred vision.

Suitable extinguishing media:

This product is noncombustible.

Unsuitable extinguishing media

:

None

Firefighting instructions:

Move containers from fire area if it can be done without risk, if
not possible, apply water from a safe distance to cool andprotect surrounding area.

Personal protection (Emergencyresponse):

Firefighters should wear protective equipment.

Most Important Symptoms/Effects
Symptoms/effects

5. Fire fighting measures

6. Accidental release measures
Personal Precautions, Protective Equipment and Emergency Procedures
General measures:

Wear proper protective equipment and avoid contact with skin andinhalation of vapor. Conduct operations from upwind and evacuate

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people downwind. Keep away personnel except for authorized ones
from spillage area by stretching ropes.
Environmental precautions
Environmental precautions:

Attention should be given to avoid discharge of spilled productinto rivers and resulting environmental damage. When diluting
spill with large amounts of water, discharge of untreatedwastewater into the environment must be avoided.

Methods and Equipment for Containment and Cleaning up:

Collect the spillage as much as possible to switable empty
container. Neutralize residue with dilute acid and then flushwith copious of water.

Technical measures:

Wear proper protective equipment to avoid contact with skin or
inhalation of vapor.

Precautions for safe handling:

Use with an enclosed system or a local exhaust ventilation.

Storage conditions:

Store in a dark, cool place and tightly closed.

Material used inpackaging/containers:

Polyethylene, fluorine resin.

For containment

7. Handling and storage
Handling

Storage

8. Exposure controls / Personal protection equipment
Sodium hydroxide
ACGIH Ceiling

2 mg/m³

Appropriate engineering
controls
Protective equipment: Use with an enclosed system or a local exhaust ventilation.

Respiratory protection: If necessary, wear dust mask

Hand protection: Impervious protective gloves

Eye protection: Safety goggles

Skin and body protection: Protective clothing, protective boots

9. Physical and chemical properties
Physical state: Liquid

Color: Colorless.

Odor: OdorlesspH: 14 (1mol/L, 25℃)

Melting point: ≈ 8 °C

Freezing point: No data available

Boiling point: 138 °C

Flash point: Non flammable.

Auto-ignition temperature: Non flammable.

Decomposition temperature: No data available

Flammability: Non flammable.

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Vapor pressure: 0.43 hPa (20℃)

Relative density: 1.5 (15℃)

Density: No data available

Relative gas density: No data available

Solubility: Water: Miscible.

Partition coefficient noctanol/water (log Pow)

: No data available

Explosive limits (vol %): No data available

Viscosity, kinematic:: No data available

Particle characteristics: No data available

10. Stability and reactivity
Reactivity: Hydroxides precipitate from aqueous solutions of many metal salts.
Fats are saponified to produce the fatty acids sodium and glycerin.

Chemical stability: Stable under normal conditions. It absorbs moisture and carbon
dioxide in the air to produce sodium carbonate.

Possibility of hazardous
reactions: Generate heat vigorously when contact with acids.
The chemical corrodes aluminium, tin, zinc, chromium, and their
alloys, releasing combustible hydrogen gas.

Conditions to avoid: Light, heat.

Incompatible materials: Acids, metals.

Hazardous decomposition
products: Sodium oxide, hydrogen.

11. Toxicological information
Acute toxicity (oral)

Acute toxicity (dermal)
Acute toxicity (inhalation): Classification not possible
Sodium hydroxide : Since acute toxicity data is only rabbit oral
LD50=325mg/kg, and there is no data in rodents, the classificationon acute oral toxicity is not possible.
: Classification not possible: No classification (gas)Classification not possible (vapor)
Classification not possible (dust, mist)

Skin corrosion/irritation: Causes severe skin burns
Sodium hydroxide : In a pig test using application of 2N (8%), 4N(16%) and 6N (24%) solutions on the abdominal region, grossblisters developed within 15 minutes of application and the 8 and
16% solutions produced severe necrosis in all epidermal layers. The
24% concentration produced numerous and severe blisters withnecrosis extending deeper into the subcutaneous tissue.
Additionally, there is a report that severe necrosis occurred after
application of a 5% solution to the skin of rabbits for 4-hour.
Based on these data, the substance was classified into category 1B.
As relevant information, the pH is 12 (0.05%). For humans, 0.5 - 4%
solutions were irritating to the skin, and in skin irritation tests
with a 0.5% solution, 55% and 61% of the volunteers showed positive
skin irritation reactions.

Serious eye damage/irritation: Causes serious eye damage
Sodium hydroxide : Based on a report that the corrosive
concentration for rabbit eyes was 1.2% or higher than 2%, and a pHof 12 (0.05%), it was classified into category 1.

Respiratory sensitization: Classification not possible

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Skin sensitization: No classificationSodium hydroxide : Male volunteers were exposed on their backs toconcentrations of 0.063 - 1.0% of the substance. After 7 days thevolunteers were challenged to a concentration of 0.125%. The
irritant response correlated well with the concentration, but anincreased response was not observed when the previously patch
tested sites were rechallenged. Based on these results, sodiumhydroxide has no skin sensitization potential.

Germ cell mutagenicity: No classification
Sodium hydroxide : In vivo mouse bone marrow micronuclei test isnegative, and in vitro mutagenicity test (Ames test) is also
negative.

Carcinogenicity: Classification not possible

Reproductive toxicity: Classification not possible

STOT-single exposure: Causes damage to organs (respiratory organs)
Sodium hydroxide : Based on the description that acute inhalation
exposure of dust or mist causes mucous membrane irritation
followed by cough and breathing difficulty, and more intensive
exposure may cause pulmonary edema or shock, it was classified into
category 1(respiratory organs).

STOT-repeated exposure: Classification not possible

Aspiration hazard: Classification not possible

12. Ecological information
Ecotoxicity
Aquatic acute
Aquatic chronic: Harmful to aquatic life
Crustacean LC50m=83mg/L: No classification
Classified into "No classification" since the toxicity is
mitigated in environmental water by buffer action though it isconsidered to be a factor of toxicity that water solution becomesa strong base.

Persistence and degradability
No additional information available
Bioaccumulative potential
No additional information available
Mobility in soil
No additional information available
Hazardous to the ozone layerOzone: Classification not possible

13. Disposal considerations
Ecological waste information: Neutralization method :Dissolve in water and flush in a drain after neutralizing withdiluted acids.
Or consult approved disposal companies.

Contaminated container and: In case of disposal of empty bottles, dispose bottles after<< GE00738 SODIUM HYDROXIDE SOLUTION 48% >>

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packagingremoving the content thoroughly.

14. Transport information
International Regulations
Transport by sea(IMDG)
UN-No. (IMDG)
Proper Shipping Name (IMDG)
Packing group (IMDG)
Transport hazard class(es)(IMDG)Air transport(IATA)
UN-No. (IATA)
Proper Shipping Name (IATA)
Packing group (IATA)
Transport hazard class(es)(IATA)::::

1824
SODIUM HYDROXIDE SOLUTION
II8:
:
:
:

1824
Sodium hydroxide solution
II
8Marine pollutant: Not applicable
Transport in bulk according to Annex II of MARPOL 73/78 and the IBC CodePollutant category:
Y
MFAG-No
:154

15. Regulatory information
Regulatory information with regard to this substance in your country or region should be examined byyour own responsibility.

16. Other information
Data sources: Handbook of dangeroous and hazardous chemicals, Japan
Industrial Safety & Health Association.（2000-2001）.
Handbook of Dangerous Substances Springer-Verlag Tokyo（1991）.
Handbook of 17322 Chemical Products, The Chemical Daily Co.
（2022）.
Handbook of Poisonous and Deleterious substances, revised andenlarged edition, Yakumu Kohosa（2000）.
NITE Chemical Risk Information Platform (NITE-CHRIP), National
Institute of Technology and Evaluation.

The information contained herein is based on several references and the present state of ourknowledge. However the SDS does not always cover all information about the product, handle theproduct carefully.The information is intended to ordinary usage, in case of particular handlings,
conduct appropriate safety measurements.The information herein is only provision of information, andit does not represent a guarantee the properties of the product.The Safety Data Sheet(SDS) isprepared based on JIS Z7253.