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

Product Safety Data Sheet
1. CHEMICAL PRODUCT AND COMPANY INFORMATIONName of chemical : Quicklime (Calcium Oxide)
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 SUITABLETIESGHSClassification
Physicochemical 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: steam)outside classification parameters
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 1(respiratory system)Respiratory toxicity from aspiration
Environmental toxicity
Acute toxicity to aquatic environment
Chronic toxicity to aquatic environment
Hazardous to the ozone layer
Label Elements
Pictorial indications or symbols

Warning statement
Hazard and toxicity information

unclassifiableunclassifiableunclassifiable

DangerRisk of hazardous effects if swallowed (oral)
Serious chemical scarring.
Serious eye damage
Respiratory damage
Risk of systemic toxicity, or digestive organ damage Risk of
respiratory system damage due to long-term or repeatedexposure
Risk of danger to life if inhaled into respiratory tract

写し

Cautionary Statements
Safety Measures

First Aid

unclassifiable

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. Washhands thoroughly after handling.
If product is swallowed, do not induce vomiting forcibly. If
product is inhaled move the affected person to a place withfresh air, and let the person rest in a position where he/she canbreathe easily.
If ingested. Rinse mouth out with water. Do
not induce vomiting forcibly.
In case of contact with eyes. Wash eyes thoroughly andcarefully for a number of minutes. If wearing contact lenses,
remove them if possible and continue washing.
If product adheres to skin, wash with plenty of water and soap. Ifproduct adheres to clothing, immediately take off or remove
contaminated clothing.
Launder contaminated clothing before reuse.
If one has been exposed to the product or there are concerns
thereof, contact a physician for an examination and treatment.
If ingested: immediately see a physician for an examinationand treatment.
Contact with eyes: immediately see a physician for an examinationand treatment.
If feeling sick, undergo an examination and treatment by aphysician.
If inhaled immediately see a physician for an examination andtreatment.

Storage
DisposalStore in a locked area.
Consign contents and containers to prefectural or city
government certified industrial waste management
specialists.

3. COMPOSITION AND COMPONENT INFORMATION
Chemical Material
Chemical name or standard nameCalcium Oxide (calcium oxide)
Synonyms
Quicklime, Lime
Chemical formula
CaO
CAS number:
1305-78-8
Reference number in Official Gazette list in Japan(Act on the Evaluation of Chemical Substances andRegulation of Their
Manufacture/Industrial Safety and Health Act)(1)-189
Impurities and stabilizing additives contributing
to classification
No information
AdditiveConcentration or concentration range
93% or greater
4. FIRST AID
INHALATION写しSKIN ADHERANCEEYE CONTACTINGESTION

Anticipated acute symptoms and delayed symptoms
Inhalation
Skin contact
Eye contact
Ingestion
Protection for first aid personnel
Precautionary items of note for the physician

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.
Immediately take off or remove all contaminated clothing.
Wash skin with running water or in a shower. Immediately
contact a physician.
Launder contaminated clothing before reuse.
Rinse carefully with water for several minutes. Then, ifwearing contact lenses, remove if readily possible. Thencontinue to rinse.
Contact a physician immediately.
Rinse mouth right away.
Immediately undergo treatment and examination from a physician.

Burning sensation, coughing, sense of breathlessness, sorethroat and headache.
Dryness of skin, reddening, burning skin injury, pain.
Reddening, pain, blurred vision, severe chemical scaring.
Burning sensation, abdominal pain, stomach cramps,vomiting, diarrhea.
First aid personnel should wear appropriate protective
gear suitable to the situation.
Complete rest and medical observation is absolutely
necessary.
The calcium oxide clay particles that have formed byreacting to the liquid and proteins in the eye are very
difficult to remove by washing the eyes with water. Handremoval by a physician is required.

5. FIRE MEASURES
Fire extinguishing agents
Suitable extinguishing media

Unsuitable extinguishing media
Specific toxicity
Specific extinguishing method

Protection for person extinguishing fire

Depending on the surrounding area and fireconditions, use water spray, dry chemicals,foam, or carbon dioxide.
Avoid direct heavy water stream, as flames
may spread to the surrounding area.
Irritation, toxicity, or corrosive or toxic gases, and fumes may
be produced from a fire.
Move containers from fire area if not too dangerous.
If a small amount, cover with dry sand and extinguish by suffocating
the fire.
Do not pour water into containers.
When extinguishing, use suitable air respirators inaddition to suitable clothing that protects from chemicals.

写し

6. LEAKAGE MEASURES
Precautions for the body, protective gear,and emergency measures

Environmental precautions

Collection and neutralization
Containment and clean-up methods/equipment
Secondary disaster prevention measures

7. PRECAUTIONS FOR HANDLING AND STORAGE
Handling
Technical measures

Local exhaust ventilation/general ventilation

Immediately secure suitable distance in all directions fromthe leakage area and close it off.
Restrict entrance of non-authorized personnel. When
not wearing suitable clothing do not touch damaged
containers or leaked product.
Workers should wear suitable protective gear (refer to“8. Exposure Prevention and ProtectionMeasures”) and avoid product contact with eyes and skin andinhalation of dust or mist.
Stay upwind from product.
Ventilate sealed spaces before entering.
Take precautions to prevent runoff of the product fromentering the natural water system and affecting theenvironment.
Sweep spilled material into dry containers.
Stop leakage if not dangerous.
Avoid generating dust and dispersion of material.
Immediately remove all sources of fire and combustible
substances. (Do not allow smoking and use of fireworks or
flames in proximity).
Prevent the material from flowing into drains, sewers, basements orclosed spaces.

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”.

Precautions for safe handling

StorageTechnical measures

Do not eat, drink, or smoke while handling this product.
Use product only in well-ventilated areas or outdoors.
Handle product with care so as to avoid generating dust. Do
not contact, inhale, or ingest product.
Do not allow product to come in contact with eyes, or skin. Do
not allow product into the eyes.
Use exhaust ventilation to maintain the concentration levels of
the air under exposure limits.
Wash hands thoroughly after handling product. Avoiding
contact: Refer to “10. Stability and Reactivity”
Prepare a storage facility with fire resistant walls, pillars andflooring, and with non-combustible beams.
The floor of the storage area must be water tight and moistureimpermeable.
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 containers, sealed, in a cool dry storage area. Storeproduct away from sources of fire such as heat, fireworks,
open flames.
No smoking in area of product.
Store in a locked space.
Use containers specified by the U.N. transportation laws.

写し

Hazardous contaminants
Storage conditions

Packaging of containers

8. EXPOSURE PREVENTION AND PROTECTIVE MEASURESManaged concentration levels
Not specified
Allowable concentration levels (Exposure limit
values, biological exposure index)
Japan Society of Occupational Health
Not specified
ACGIH
TLV-TWA 2mg/m3
Facility measures
Incorporate such measures as sealing off the production
process area, local ventilation, and other measures tomaintain the concentration levels of the air under allowablelimits.
Install eye washing equipment and safety showers in storage
and work areas.
Protective Gear
Respiratory protective gear
Wear suitable respiratory protective gear.
Protective gear for the hands
Wear suitable protective gloves.
Nitrile or vinyl protective wear is not considered suitable protectivegear.
Neoprene is recommended.
Protective gear for eyes and/or faceProtective gear for the skin and body
Health measures

Wear suitable eye protective gear.
(safety goggles, and face shielding, etc.)
Wear face protection, protective clothing,safety shoes, etc.
Do not eat, drink, or smoke while handling this product.
Wash hands thoroughly after handling.

9. PHYSICAL AND CHEMICAL PROPERTIES
Information on basic physical and chemical properties
Physical state
Powder (ICSC(J)(1997)
Color
White(ICSC(J)(1997)
Odor
Odorless
pH
No data
Melting/congealing point
2570°C (ICSC(J)(1997)
Boiling point, initial boiling point andboiling range
2850°C (ICSC(J)(1997)
Flash point
Incombustible
Explosion range
No data
Vapor pressure
No data
Vapor density (Air = 1)
No dataSpecific gravity (Density)
3.3-3.4 (ICSC(J)(1997)
Solubility
Reacts with water
Octanol/water partition coefficient
No data
Spontaneous combustion temperature
Non-combustible
Decomposition temperature
No data
Odor threshold value
No data
Evaporation speed (butyl acetate = 1)
Not applicableNon-combustible
Flammability (solid, gas)
Viscosity
No data

写し

10. STABILITY AND REACTIVITY
Stability

Hazardous reaction possibility

Conditions to be avoided
Hazardous contaminants
Hazardous decomposition substances

Absorbs moisture and carbon dioxide from the atmosphereand generates calcium hydrate and calcium carbonate.
When product is piled in large quantities, its temperature willrise to around 300°C due to humidity.
Reacts to water, and will generate sufficient heat to ignite
combustible substances.
Strongly reacts with acid, halogens and metals.
Will ignite if comes in contact with sulfur or hydrogenpentafluoride.
Will generate heat if comes in contact withhydrochloric acid.
Contact with water, acids, combustible substances, andmetals.
Acids, halogens, metals.
None

11. TOXICOLOGICAL INFORMATION
Acute toxicity
OralTransdermal
Inhalation (powder dust)

Based on the rat LD50 values of 5000 mg/kg and5916 mg/kg (Food Safety Commission AdditiveEvaluation Report (2013)), the substance wasdesignated as not classified ("Class 5" in the UN
classification criteria).
unclassifiableunclassifiableSkin corrosivity/irritation

Severe eye damage/irritation
Respiratory sensitization
Skin sensitization
Germ-cell mutagenicity

Carcinogenicity
Genotoxicity

This product is classified as Class 2 based on thedescription (ACGIH (7th, 2001)) that it is highly
irritating to moist skin.
In addition, the UN Recommendation on theTransport of Dangerous Goods classifies it as Class 8.
The classification was changed due to the revision ofthe guidance.
Classified as Class 1 based on the statement thatparticulate calcium oxide may cause severeburns to the eyes (ACGIH (7th, 2001)).
unclassifiableunclassifiable
Cannot be classified due to lack of data. That is,there are no in vivo data, and in vitro it is negativein a recent reverse mutation test (Food Safety
Commission Additive Evaluation Report (2013)).
unclassifiableunclassifiable

写しSpecific target organs(Single exposure)This substance reacts with water to produce
calcium hydroxide. In humans, short-term
exposure to large amounts of calcium hydroxide isreported to cause pulmonary edema and shock(PATTY (4th, 1993)). Based on the above, thisproduct is classified as class 1 (respiratoryorgans).

Specific target organs(Repeated exposure)In humans, inflammation of the respiratory tract,
ulceration and perforation of the nasal septum
have been reported due to inhalation ofquicklime (ACGIH (7th, 2001)). Therefore, it isclassified as Class 1 (respiratory organs).
unclassifiable

Respiratory toxicity from aspiration

12. ENVIRONMENTAL IMPACT INFORMATION
Acute hazard level to aquatic environment
Chronic hazard level to aquatic environmentHazardous to the ozone layer
13. DISPOSAL PRECAUTIONS
Disposal of residual productunclassifiableunclassifiableunclassifiable

Dispose in accordance with pertinent regulations and local
municipal standards.
Dispose of using a prefectural or city government certified industrial
waste disposal company.
If disposal services are offered by local public organizations,consign with such organizations undertaking such services.
Cast small amounts at a time into large amounts of waterContaminated containers and packaging

because of the risk of generating heat from the neutralization
process; neutralize this with diluted sulfuric acid to dispose in
the form of hydrated lime.
Containers can be cleaned and recycled or disposed inaccordance with pertinent regulations or local municipality
standards. When disposing of empty containers, eliminate allcontents completely.

14. PRECAUTIONS FOR TRANSPORTAIONInternational regulations
Marine transport regulations

No dangerous goods

Air transport regulations
U.N. No.
Proper Shipping NameClass
Secondary Risk
Packing Group
Domestic regulations
Land transport regulations

Comply with ICAO/IATA
1910
Calcium oxide
8

写しMarine transport regulations
Air transport regulations
U.N. No.
Proper Shipping NameClassPacking GroupRegarding special safety measures

15. APPLICABLE LAWS AND REGULATIONS
Industrial Safety and Health Law

Fire Service Act
Civil Aeronautics ActIII

No special regulations

No dangerous goods
Compliance with aviation laws
1910
Calcium oxide
8
IIITransportation, avoid direct sunlight, carefully load
product to avoid breaking, corrosion or leakage ofcontainers, and ensure that the load will not collapse. Do
not transport product with food or fodder.
Do not load any heavy load on top of this product.

Hazardous material requiring notification.
(Article 57-2, Enforcement order 18-2 Table No. 9) (Governmentordinance number 190)
Substance that requires registration of storage.
(Article 9-3 / Hazardous material regulation 1-10)
Corrosive material.
(Hazardous Materials Disclosure Table 1 of Article
194 in the Enforcement Regulations)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/16-mhlw-0090.html
3) Sangyo Eiseigaku Zasshi, 2022;64(5):253-285 Recommendation of Occupational Limits (FY2022)
4) JIS Z 7253 : 2019【Hazard communication of chemicals based on GHS-Labelling and Safety
Data Sheet(SDS)】