Created: September 1, 2006
Revised: November 1, 2022

Product Safety Data Sheet
1. CHEMICAL PRODUCT AND COMPANY INFORMATIONName of chemical : Hydrated Lime (Calcium Hydroxide)
Company Name
: Takunan Steel Co., Ltd.
Address: 3-26 Kaiho-cho, Okinawa-shi, Okinawa-ken+
Department: quality control department
Phone: 098-934-6811
Fax: 098-934-6833
Emergency contact : same as above
Manufacturer: Nago Lime Factory
Address: 2656-2 Awa, Nago-shi, Okinawa-kenPhone: 0980-53-8018

写し2. SUMMARY OF HAZARDOUS SUITABLETIESGHSClassificationPhysicochemical hazards
Explosive classification
outside classification parameters
Combustible/Flammable gas
outside classification parameters
Combustible/Flammable aerosol
outside classification parameters
Burnable/Oxidizing gas
outside classification parameters
High pressure gas
outside classification parameters
Inflammable liquid
outside classification parameters
Combustible solid
outside subcategory parameters
Self-reactive chemical article
outside classification parameters
Pyrophoric liquid
outside classification parameters
Pyrophoric solid
outside subcategory parameters
Pyrogenic chemical agent
outside subcategory parameters
Substances which in contact with water emits flammable gases outside subcategory parameters Oxidizingliquids
outside classification parameters
Oxidizing solid
unclassifiable
Organic peroxide
outside classification parameters
Metallic corrosive materials
unclassifiable
Human health hazards
Acute toxicity (oral)
outside subcategory parameters
Acute toxicity (transdermal)
unclassifiable
Acute toxicity (inhalation: gas) classification
outside classification parameters
Acute toxicity (inhalation: vapors)
unclassifiable
Acute toxicity (inhalation: powder dust)
unclassifiable
Acute toxicity (inhalation: mist) classoutside classification parameters
Skin corrosivity/irritationsubcategory 2
Serious eye damage /irritationsubcategory 1
Respiratory sensitization
unclassifiable
Skin sensitization
unclassifiable
Germ-cell mutagenicity
unclassifiable
Carcinogenicity
unclassifiable
Reproductive toxicity
unclassifiable
Specific target organs (single exposure)subcategory 1(respiratory system)
Specific target organs (repeated exposure)subcategory 2 (lungs)

Respiratory toxicity from aspiration
Environmental toxicity
Acute toxicity to aquatic environment
Chronic toxicity to aquatic environment
Label Elements
Pictorial indications or symbols

Warning statement
Hazard and toxicity information

unclassifiableunclassifiable

DangerSkin irritation
Serious eye damage
Respiratory damage
Risk of lung damage due to long-term or repeatedexposures

写しCautionary Statements
Safety Measures

First Aid

unclassifiableStorage
Disposal

3. COMPOSITION AND COMPONENT INFORMATION
Chemical Characterization
Chemical name or standard name
Other names
Chemical formula
Chemical property(Chemical formula or structural formula)
CAS number:
Reference number in Official Gazette list in

Wear suitable protective gloves.
Wear suitable protective glasses and face guard. Do notinhale dust and fumes.
Do not eat, drink, or smoke while handling this product. Wash
hands thoroughly after handling.
If product adheres to skin, wash with plenty of water and soap.
If product adheres to skin, take off contaminated clothing. Laundercontaminated clothing before reuse.
If product gets in the eyes, rinse carefully with water for several
minutes.
If wearing contact lenses, remove them if possible.
Then continue to rinse.
If product gets in the eyes, contact a physician immediately.
If product adheres to skin and irritation occurs, seek toundergo a medical examination and treatment from aphysician.
If feeling sick, undergo an examination and treatment by aphysician.
Store in a locked space
Consign contents and containers to a prefectural or city
government certified industrial waste management
specialists.

Calcium Hydroxide
Slaked lime, Hydrated lime, Calcium hydrate
Ca(OH)21305-62-0

Japan(Act on the Evaluation of Chemical Substances andRegulation of Their
Manufacture/Industrial Safety and Health Act)(1)-181
Impurities and stabilizing additives contributing
to classification
No information
Additive
Concentration or concentration range
72.5% or greater (value converted to CaO)
4. FIRST AID
INHALATIONSKIN ADHERANCEEYE CONTACTINGESTION写しAnticipated acute symptoms and late-onset symptoms
Inhalation
Skin contact
Eye contact
Ingestion

Move the affected person to a place with fresh air, let theperson rest in a position where he/she can breathe easily. If
feeling sick, undergo treatment and an examination from aphysician.
Take off contaminated clothing.
Wash skin immediately.
Wash skin with plenty of water and soap.
If skin is irritated, undergo examination and treatment from aphysician.
If feeling sick, undergo treatment and examination froma physician.
Launder contaminated clothing before reuse.
Contact physician immediately.
Rinse carefully with water for several minutes. If
wearing contact lenses, remove if possible. Thencontinue to rinse.
If feeling sick, undergo treatment and examination froma physician.
Rinse mouth. If feeling sick, undergo treatment andexamination from a physician.

5. FIRE MEASURES
Fire extinguishing agents
Suitable extinguishing media
Unsuitable extinguishing media
Specific toxicity
Specific extinguishing methods

Sore throat, cough, burning sensation.
Irritation, reddening, roughness, pain, dryness,chemical scaring, and blisters.
Reddening, pain, serious chemical scaring.
Burning sensation, abdominal pain, stomach cramps,vomiting.

Use fire extinguishing media suitable for thesurrounding equipment.
No data
Irritating, corrosive or toxic gas may be produced from fire.
Containers may explode from heat.
Move containers from area of fire if not too dangerous.
Do not pour water into containers.
Extinguish from the farthest effective distance, using
an unmanned hose retainer or nozzle with a monitor.
Cool down the containers using plenty of water even after fire isextinguished.

Protection for persons extinguishing fire

When extinguishing, use suitable air respirators andclothing that protects the body from chemicals.

6. LEAKAGE MEASURES
Precautions for the body, protective gear, and emergency measures
Immediately secure a suitable distance in all directions fromthe leakage area and close it off.
Restrict entrance of non-authorized personnel.
Workers should wear suitable protective gear (referto “8. Exposure Prevention and ProtectionMeasures”) and avoid contact with eyes and skin and inhalation ofgases.
When not wearing suitable protective clothing, do not touchdamaged containers or leaked material.
If fire has not occurred after the leakage, wear airtight andimpermeable protective clothing.
Stay upwind from leakage.Stay away from low lying areas.
Ventilate sealed spaces.
Environmental precautions
Take precautions to prevent runoff of the product fromentering the natural water system and affecting theenvironment. Do not release product into environment.
Collection and neutralization
Use dry dirt, sand or an incombustible substance to absorb
or cover material and transfer to containers. Sweep togather leaked material and collect it in empty containers.
Containment and clean-up methods/equipment
Stop leakage if not too dangerous.
Secondary disaster prevention measures
Immediately remove all sources of fire.
(Restrict smoking and use of fireworks or flames in proximity)
Prevent the material from flowing into drains, sewers, basements
or closed spaces.
Do not pour water into containers.
Dispose of material frequently to prevent the risk ofslipping on the floor.

写し

7. PRECAUTIONS FOR HANDLING AND STORAGE
Handling
Technical measures

Local exhaust ventilation/general ventilation

Precautions for safe handling

Avoiding contact
Storage

Establish facility measures listed in“8.Exposure Prevention and Protection Measures” andwear protective gear.
Establish local exhaust ventilation and overall ventilation
listed in “8. Exposure Prevention and Protection
Measures”.
Do not come in contact, inhale or ingest product.
Use exhaust ventilation to maintain the concentration levels of
the air under exposure limit.
Use product only in well-ventilated areas or outdoors. Wash
hands thoroughly after handling product.
Refer to “10. Stability and Reactivity”

Technical measures
Hazardous contaminants
Storage conditions
Packaging of containers

To store and handle hazardous materials prepare a storage
facility that has outside light or inside lighting, and ventilation.
Refer to “10. Stability and Reactivity”
Store in a locked space.
Use containers specified by the U.N. transportation laws.

8. EXPOSURE PREVENTION AND PROTECTIVE MEASURESManaged concentration levels
Not specified
Allowable concentration levels (Exposure limitvalue, biological exposure index)
Japan Society of Occupational Health
Not specified
ACGIH
TLV-TWA5mg/m3
Facility measures
Install eye washing equipment and safety showers instorage and work areas.
Protective Gear
Respiratory protective gear
Wear suitable respiratory protective gear.
Protective gear for the hands
Wear suitable protective gloves.
Protective gear for eyes and/or face
Wear suitable eye protection.
Wear protective goggles and suitable face gear against airborne
chemical droplets.
Wear complete coverage chemical splash goggles and a faceshield if there is a risk of the eyes and face coming in contact
with hazardous materials from splash or spray.
Protective gear for the skin and body
Wear suitable protective gear for the face.
Health measures
Wash hands thoroughly after handling.

写し

9. PHYSICAL AND CHEMICAL PROPERTIES
Information on basic physical and chemical properties
Physical state
PowderColorWhiteOdorOdorlesspH
12.4 (25°C saturated aqueous solution)
Melting/setting point
580°C (Decomposition) (ICSC(J)(1997)
Boiling point, initial boiling point andboiling range
Decomposition (ICSC(J)(1997)
Flash point
Incombustible (ICSC(J)(1997)
Explosion range
Incombustible (ICSC(J)(1997)
Vapor pressure
No data
Vapor density (Air = 1)
No dataSpecific gravity (Density)
2.2(ICSC(J)(1997)
Solubility
Slightly soluble to water Merck(13th,2001)
Octanol/water partition coefficient
No data
Spontaneous combustion temperature
607°C (ICSC(J)(1997)
Decomposition temperature580°C (ICSC(J)(1997)
Odor threshold value
No value data
Evaporation speed (butyl acetate = 1)
No data
Flammability (solid, gas)
No data
Viscosity
No data10. STABILITY AND REACTIVITY
Stability

Hazardous reaction possibilities

Conditions to be avoided
Hazardous contaminants
Hazardous decomposition substances
11. TOXICOLOGICAL INFORMATION
Acute toxicity
Oral

Absorbs carbon dioxide in the atmosphere, then gradually turns
into calcium carbonate.
Decomposes if heated then turns into calcium oxide.
Reacts to acid, then emits heat.
Reacts to strong oxidants.
Erodes many metals in presence of water, and produces
flammable/explosive gas (hydrogen).
Contact with air. Heating.
Acids.
Calcium oxide, hydrogen gas

Classified as outside subcategory parameters based on rats
LD50 7340mg/kg(ACGIH(2001); HSDB(2005)
No data
No dataClassified as subcategory 2 based on indications ofmoderate irritation to the entire surface of body
including eyes and respiratory tracts ACGIH(7th,2001), andmoderate/severe/corrosive irritation to human skin.
(IUCLID,2000; HSDB,2005; ICSC(J),1997;SITTIG,4th,2002: HSFS,2005)
Skin irritation.
Classified as subcategory 1 based on indications ofmoderate/severe/corrosive irritations to human eyes,(ACGIH,7th,2001; IUCLID,2000; HSDB,2002;ICSC(J),1997; SITTIG,4th,2002: HSFS,2005)
and corrosive irritation to rabbit eyes. IUCLID(2000)
Severe eye damage.

写しTransdermalInhalation (dust)
Skin corrosivity/irritation

Sever eye damage/irritation

Respiratory sensitization or skin sensitization
Respiratory sensitization
Skin sensitization
Germ-cell mutagenicity
Carcinogenicity
Genotoxicity
Specific target organs/systemic toxicity(Single exposure)Specific target organs/systemic toxicity(Repeated exposure)Respiratory system toxicity from aspiration

No data
No data
No data
No data
No dataClassified as subcategory 1 (Respiratory system) basedon indications of irritation to human respiratory system
and respiratory tracts that causes pulmonary edema.
ACGIH,7th,2001; HSDB,2002; ICSC(J),1997;SITTIG,4th,2002; HSFS,2005)
Classified as subcategory 2 based on indications inPriority 2 that human lungs might be damaged.
(ICSC(J),1997; SITTIG,4th,2002)
Risk of damage due to long-term or repeated exposure.
No data12. ENVIRONMENTAL IMPACT INFORMATION
Aquatic environment acute hazardousness
Aquatic environment chronic hazardousness
13. DISPOSAL PRECAUTIONS
Disposal of residual productContaminated containers and packaging

Unclassifiable
Unclassifiable

Dispose in accordance with pertinent regulations andlocal municipal standards.
Dispose of using a prefectural or city government certified
industrial waste disposal company.
If disposal services are offered by local publicorganizations, consign with such organizations
undertaking such services.
When consigning disposal of residual product, thoroughly notify
disposal organization of hazards and dangers.
Containers can be cleaned and recycled or disposed inaccordance with pertinent regulations or local municipality
standards.
When disposing of empty containers,
eliminate all contents completely.

写し

14. PRECAUTIONS FOR TRANSPORTAIONInternational regulations
Marine transport regulations
Air transport regulations
Domestic regulations
Land transport regulations
Marine transport regulations
Air transport regulations
Regarding special safety measures

15. APPLICABLE LAWS AND REGULATIONS
Industrial Safety and Health Law

N/A
N/A

N/A
N/A
N/A
Transportation, avoid direct sunlight, carefully load
product to avoid breaking, corrosion or leakage ofcontainers, and ensure that the load will not collapse. Donot transport product with food or fodder.
Do not load product on top of other hazardous orflammable materials.
Do not load product near other hazardous materials. A‘yellow card’ is required when transporting.

Hazardous material requiring notification(Article 57-2, Enforcement order 18-2 Table No.9) (Governmentordinance number 317)

16. OTHER INFORMATION
References
1) ICSC(J) 1997
2) NITE - GHS Classification Result of Chemical Substance Management Field
https://www.nite.go.jp/chem/ghs/06-imcg- 0802.html
3) Sangyo Eiseigaku Zasshi, 2022;64(5):253-285 Recommendation of Occupational Limits(FY2022)
4)ACGIH (American Conference of Governmental IndustrialHygienists)website

https://www.acgih.org/calcium-hydroxide/5)JIS Z 7253 : 2019【Hazard communication of chemicals based on GHS-Labelling and Safety
Data Sheet(SDS)】

写し