Understanding Calcium Hypochlorite Through Its Material Safety Data Sheet (MSDS)

Calcium Hypochlorite, also known as chlorine powder or chlorin, has the chemical formula Ca(OCl)₂. It is a widely used disinfectant in daily life. Let Dong A guide you through this product based on its Material Safety Data Sheet (MSDS).

SECTION I: IDENTIFICATION OF THE SUBSTANCE AND SUPPLIER

1. Substance Information

Product Name

Common Name

Trade Name

CAS No

EC No

HMIS Classification (USA)

Calcium Hypochlorite

Chlorine

7778-54-3

1748

231-908-7

Health Hazard: 3

Flammability: 0

Reactivity: 2

Personal Protection: J

2. Recommended Uses and Restrictions

Used for disinfection of drinking water and swimming pools. Calcium Hypochlorite is also used in toilet cleaners, household disinfectants, and for controlling moss and algae.

3. Manufacturer Information

Dong A Chemical Joint Stock Company
Area 9, Phu Ninh Commune, Phu Tho Province, Vietnam
Tel: +84 210 652 3333
Email: kinhdoanh@dongachem.vn

4. Emergency Contact

Dong A Chemical Joint Stock Company
Tel: +84 210 652 3333
Email: kinhdoanh@dongachem.vn

SECTION II: HAZARD IDENTIFICATION

1. GHS Classification

1.1 Physical Hazards

1.2 Health Hazards

2. Hazard Statements

H272: May intensify fire; oxidizer
H302: Harmful if swallowed
H314: Causes severe skin burns and eye damage
H400: Very toxic to aquatic life

3. Precautionary Statements

P210: Keep away from heat/sparks/open flames/hot surfaces – No smoking
P220: Keep away from clothing and combustible materials
P221: Take precautions to avoid mixing with combustibles
P260: Do not breathe dust/fume/gas/mist/vapors
P264: Wash thoroughly after handling
P270: Do not eat, drink or smoke when using this product
P273: Avoid release to the environment
P280: Wear protective gloves/clothing/eye/face protection
P284: Wear respiratory protection
P301+P312: IF SWALLOWED: Call a poison center/doctor immediately
P301+P330+P331: Rinse mouth. Do NOT induce vomiting
P303+P361+P353: IF ON SKIN: Remove contaminated clothing. Rinse skin with water
P304+P340: IF INHALED: Move to fresh air
P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes
P310: Immediately call a poison center/doctor
P321: Specific treatment required
P330: Rinse mouth
P363: Wash contaminated clothing before reuse
P370+P378: In case of fire: Use dry powder extinguisher
P391: Collect spillage
P405: Store locked up
P501: Dispose of contents/container in accordance with regulations

4. Other Hazards

No additional information available.

SECTION III: COMPOSITION / INFORMATION ON INGREDIENTS

Component	CAS No	Chemical Formula	Content (%
Calcium Hypochlorite	7778-54-3	Ca(OCl)2	≥ 65 %

SECTION IV: FIRST AID MEASURES

1. Description of First Aid Measures

Eye Contact: Rinse immediately with water for at least 15 minutes. Seek medical attention.
Inhalation: Move to fresh air, keep at rest, seek medical attention.
Skin Contact: Remove contaminated clothing, rinse thoroughly with water.
Ingestion: Do not induce vomiting. Seek immediate medical attention.

2. Symptoms and Effects

Not classified as carcinogenic (OSHA, ACGIH). Not mutagenic or toxic to reproduction. Harmful to lungs and mucous membranes.

3. Medical Attention

Treat symptomatically under physician guidance.

SECTION V: FIRE-FIGHTING MEASURES

Flammability

Hazard

Extinguishing Media

Protective Equipment

Special Hazards

Non-flammable

Strong oxidizer, may intensify fire

Water spray (DO NOT use CO₂ or ammonium-based extinguishers)

Wear full protective gear and respirator

May accelerate combustion under heat

SECTION VI: ACCIDENTAL RELEASE MEASURES

Evacuate area and isolate hazard zone
Avoid contact and inhalation
Prevent entry into drains and waterways
Use absorbent materials (sand, soil)
Notify authorities if uncontrolled

SECTION VII: HANDLING AND STORAGE

Handling

Avoid inhalation and contact
Keep away from ignition sources
Follow operational procedures strictly

Storage

Store in a well-ventilated, cool, dry area
Keep away from sunlight and incompatible materials
Keep containers tightly closed

SECTION VIII: EXPOSURE CONTROLS / PERSONAL PROTECTION

Eye Protection: Safety goggles
Skin Protection: Protective clothing
Hand Protection: Chemical-resistant gloves
Foot Protection: Safety boots
Respiratory Protection: Suitable respirator
Prefer certified PPE (e.g., 3M)

SECTION IX: PHYSICAL AND CHEMICAL PROPERTIES

Appearance: powder/granules	Odor: Chlorine-like
Color: White or off-white	Melting Point: 100°C
Odor: Chlorine-like	Flash Point (°C): No data available
Vapor Pressure (mm Hg) at standard temperature and pressure: No data available	Auto-ignition Temperature (°C): No data available
Vapor Density (Air = 1) at standard temperature and pressure: No data available	Upper Flammability Limit (% by volume in air): No data available
Solubility: Soluble in water	Lower Flammability Limit (% by volume in air): No data available
Moisture Content (%): ≤ 10%	Evaporation Rate: No data available
Density (kg/m³): 2,350 at 20°C	Molecular Weight: 142.99 g/mol

SECTION X: STABILITY AND REACTIVITY

Decomposes rapidly in air and under heat (~177°C)
Strong oxidizer
Reacts with acids releasing chlorine gas
Reacts with ammonium compounds → explosion risk
Incompatible with water, organics, flammable materials

SECTION XI: TOXICOLOGICAL INFORMATION

Routes: Skin, eyes, inhalation, ingestion
Effects: Burns, eye damage, lung irritation
LD50 (oral, rat): 850 mg/kg
Not classified as carcinogenic

SECTION XII: ECOLOGICAL INFORMATION

Highly toxic to aquatic organisms
May cause environmental pollution if released
Not biodegradable by bacteria

SECTION XIII: DISPOSAL CONSIDERATIONS

Dispose of in accordance with hazardous waste regulations (Circular No. 02/2022/TT-BTNMT).

SECTION XIV: TRANSPORT INFORMATION

SECTION XV: REGULATORY INFORMATION

Complies with Vietnamese chemical laws and regulations, including:

Law on Chemicals No. 69/2025/QH15
Decrees 24/2026, 25/2026, 26/2026
Circulars 01/2026/TT-BCT, 02/2026/TT-BCT
Decree 34/2024/NĐ-CP on dangerous goods transportation

CONCLUSION

The above information summarizes the MSDS of Calcium Hypochlorite. We hope this document provides useful insights to help you handle and use the product safely and effectively.

For further information, please contact: Tel/WhatsApp/Viber/Zalo: +84 342 597 726

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