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LABORATORY GRADE

Citric Acid Monohydrate Extra Pure

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Citric Acid Monohydrate Extra Pure is a highly refined, crystalline organic acid commonly used in laboratory settings for its chelating, buffering, and acidifying properties. With one molecule of water of crystallization, it serves as a reliable pH adjuster and complexing agent in analytical chemistry, titrations, and biochemical experiments. Its extra pure grade ensures minimal contaminants, making it suitable for sensitive applications in pharmaceutical research, food analysis, and preparation of reagent solutions. Soluble in water and ethanol, it is stable under normal lab conditions but should be stored in a cool, dry place in tightly sealed containers to prevent clumping and moisture absorption.

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Description

Primary Uses
Buffer Preparation

Commonly used to prepare citrate buffers for maintaining acidic to neutral pH (3.0–6.2) in biochemical and analytical experiments.

Chelating Agent

Binds to metal ions like Ca²⁺, Mg²⁺, and Fe³⁺ in complexometric titrations or metal ion removal experiments.

Standard for Titration

Used in acid-base titration to calibrate alkaline solutions or as a primary standard in volumetric analysis.

pH Adjustment

Added to experimental media and solutions to adjust and stabilize pH, especially in microbial and enzymatic studies.

Secondary Uses
Analytical Reagent

Employed in colorimetric tests or precipitation reactions involving metal ions.

Carbon Source in Microbiology

Serves as an organic carbon source in selective culture media for microbial growth.

Cleaning Agent in Laboratory Equipment

Helps remove limescale or metal salt deposits from lab glassware or metal instruments without the use of strong acids.

Precursor for Citrate Salts

Used in the synthesis of other laboratory-grade chemicals like sodium citrate or ammonium citrate.

PRODUCT KEY FEATURES

Basic Identification Attributes
Chemical Name: Citric Acid Monohydrate

CAS Number: 5949-29-1

HS Code: 2918.14.00

Molecular Formula: C₆H₈O₇·H₂O

Molecular Weight: 210.14 g/mol

Synonyms: 2-Hydroxy-1,2,3-propane-tricarboxylic acid monohydrate

2. Physical & Chemical Properties
Appearance: Colorless to white crystalline powder

Odor: Odorless

Taste: Strongly acidic (sour)

Solubility: Freely soluble in water (59 g/100 mL at 20°C), soluble in ethanol

Melting Point: ~100°C (decomposes with loss of water)

Density: ~1.542 g/cm³

pH (1% solution): ~2.2
3. Safety & Hazard Attributes
GHS Classification:

H319: Causes serious eye irritation

NFPA Ratings:

Health: 1

Flammability: 0

Reactivity: 0

First Aid Measures:

Inhalation: Move to fresh air, rinse nose with water

Skin/Eyes: Rinse thoroughly with water for several minutes

Ingestion: Rinse mouth and drink water; generally regarded as safe in small quantities

4. Storage & Handling Attributes
Storage Conditions:

Store in a cool, dry, well-ventilated area

Keep container tightly closed and protected from moisture

Container Type: Polyethylene or HDPE jars, fiber drums with liners

Stability: Stable under normal storage conditions

Incompatible Materials: Strong oxidizers, strong bases

Shelf Life: 2–3 years (if kept dry and sealed)

5. Regulatory & Compliance Attributes
Hazard Symbols:

 

EINECS Number: 201-069-1

FDA Status: GRAS (Generally Recognized As Safe)

E Number: E330 (Food additive)

6. Applications in Laboratory & Industry
Laboratory Use:

Buffering agent

Standard acid in titrations

pH adjustment in biochemical experiments

Other Industries:

Food & Beverage: Flavoring agent, preservative

Cosmetics: pH regulator, antioxidant

Pharmaceuticals: Effervescent formulations

Cleaning Products: Lime scale remover, chelating agent

SAFETY HANDLING PRECAUTIONS

PPE Required:

Lab coat

Safety goggles

Nitrile gloves

Dust mask (if powder is airborne)

Handling:

Avoid inhaling dust.

Avoid contact with eyes and prolonged skin exposure.

Handle in a well-ventilated area or under fume hood if in powder form.

Wash hands thoroughly after use.

Storage:

Store in a tightly sealed container.

Keep in a cool, dry place away from strong bases or oxidizing agents.

FIRST AID MEASURES
Inhalation:

Move to fresh air.

Seek medical advice if irritation persists.

Skin Contact:

Wash with soap and water.

Remove contaminated clothing.

Seek medical attention if skin becomes irritated.

Eye Contact:

Rinse thoroughly with water for at least 15 minutes.

Keep eyelids open and move eyes around during flushing.

Get medical attention if irritation continues.

Ingestion:

Rinse mouth with water.

Drink water to dilute.

Usually not harmful in small quantities, but seek medical advice if discomfort occurs.

FIREFIGHTING MEASURES
Flammability:

Not flammable under normal conditions, but combustible in powder form.

Suitable Extinguishers:

Dry chemical

CO₂

Water spray

Foam

Fire Hazards:

Combustion may release CO, CO₂, and irritating fumes.

Fine dust may form explosive mixtures with air.

Firefighting Gear:

Wear full protective clothing and self-contained breathing apparatus (SCBA).

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