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Calcium Granular Extra Pure
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Calcium Metal Extra Pure
LABORATORY GRADE

Calcium Hyroxide Extra Pure

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Calcium Hydroxide Extra Pure is a finely powdered, high-purity inorganic compound commonly used in laboratories as a strong base, pH adjuster, and reagent in qualitative and quantitative analysis. It is widely employed in acid-base titrations, preparation of limewater for carbon dioxide detection, and precipitation reactions involving metal ions. Its strong alkalinity also makes it useful in studying saponification, neutralization, and hydration processes. The extra pure grade ensures minimal impurities, making it suitable for sensitive analytical procedures and educational demonstrations. It should be stored in tightly sealed containers to prevent carbonation and moisture absorption, which can affect its chemical properties.

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Description

Primary Uses
Standard Alkali for Acid-Base Titrations

Used as a mild base in volumetric analysis and titrations, especially when standardizing weak acids or in reactions where stronger alkalis (e.g., NaOH) may interfere.

Preparation of Limewater for COâ‚‚ Testing

Saturated solution (limewater) is used to detect carbon dioxide via precipitation of calcium carbonate—a classic qualitative test in educational chemistry labs.

Reagent in Inorganic Precipitation Reactions

Involved in double displacement and precipitation reactions, such as forming metal hydroxides for separation or identification purposes.

pH Adjustment and Buffering Agent

Used in buffer preparation and to maintain or raise pH in reactions that require weak alkali conditions.

Secondary Uses
Demonstrating Solubility and Equilibrium Principles

Useful in teaching concepts of saturated solutions, Ksp (solubility product), and dynamic equilibrium using limewater systems.

COâ‚‚ Absorbent in Controlled Experiments

Sometimes used to trap or remove COâ‚‚ from reaction atmospheres or closed systems.

Microbial or Sterilization Studies

Its alkaline nature makes it useful in bacterial inhibition experiments or basic pH sterilization methods for media in microbiology labs.

PRODUCT KEY FEATURES

Basic Identification Attributes
Chemical Name: Calcium Hydroxide

Chemical Formula: Ca(OH)â‚‚

CAS Number: 1305-62-0

HS Code: 2825.90.00

Grade: Extra Pure (Laboratory Grade)

Synonyms: Slaked Lime, Hydrated Lime, Caustic Lime

2. Physical & Chemical Properties
Appearance: White powder or colorless crystals

Odor: Odorless

Molar Mass: 74.09 g/mol

Melting Point: ~580 °C (decomposes)

Solubility:

Slightly soluble in water (~1.73 g/L at 20 °C)

Forms a basic solution (limewater)

pH (saturated solution): ~12.4

Reactivity: Reacts with acids, COâ‚‚, and ammonium salts

3. Safety & Hazard Attributes
GHS Classification:

Skin Irritant (Category 2)

Eye Damage (Category 1)

Hazard Statements:

H315: Causes skin irritation

H318: Causes serious eye damage

Precautionary Statements:

Wear protective gloves and eye protection

Avoid breathing dust

Wash hands thoroughly after handling

NFPA Ratings:

Health: 2

Flammability: 0

Reactivity: 1

4. Storage & Handling Attributes
Storage Conditions:

Store in tightly closed containers

Keep in a dry, cool, well-ventilated area

Protect from moisture and carbon dioxide (can convert to calcium carbonate)

Packaging: Plastic jars, HDPE bottles, moisture-resistant containers

Handling Precautions:

Avoid dust generation

Handle under fume hood if large quantities are involved

5. Regulatory & Compliance Attributes
Transport Classification: Not classified as hazardous for transport

Disposal Considerations:

Neutralize with dilute acid before disposal

Dispose of in accordance with local regulations for alkaline chemicals

6. Environmental & Health Impact
Toxicity:

Low systemic toxicity

Causes severe eye and skin irritation on contact

Ecotoxicity:

Alkaline material may disrupt pH in aquatic environments

Biodegradability: Not applicable (inorganic base)

SAFETY HANDLING PRECAUTIONS

Personal Protective Equipment (PPE):

Wear chemical splash goggles, gloves, lab coat, and optionally a face shield.

Use a dust mask or respirator if dust is generated.

Handling:

Handle in a well-ventilated area.

Avoid inhalation of dust and contact with eyes or skin.

Do not mix with acids without proper precautions — can generate heat.

Storage:

Store in a cool, dry, tightly closed container.

Keep away from moisture, incompatible materials (acids, ammonium salts), and COâ‚‚ (reacts to form calcium carbonate).

FIRST AID MEASURES
Inhalation:

Move person to fresh air.

If breathing is difficult, provide oxygen and seek medical attention.

Skin Contact:

Immediately wash with soap and water.

Remove contaminated clothing.

Seek medical attention if irritation persists.

Eye Contact:

Rinse cautiously with water for at least 15 minutes.

Lift eyelids occasionally.

Seek immediate medical assistance.

Ingestion:

Rinse mouth with water.

Do not induce vomiting.

Give water to dilute and seek immediate medical attention.

FIRE FIGHTING MEASURES
Flammability:

Not flammable.

However, it reacts exothermically with water and acids, which can intensify a fire.

Extinguishing Media:

Use water spray, dry chemical, foam, or COâ‚‚ for surrounding fires.

Do not use water directly on dry powder — may cause heat and spattering.

Hazardous Combustion Products:

May emit calcium oxide and irritating vapors when heated.

Firefighter Protection:

Wear SCBA and full protective gear.

Avoid creating airborne dust during firefighting.

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