Ammonium Acetate Extra Pure

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SHORT DESCRIPTION

Ammonium Acetate Extra Pure is a high-purity, white crystalline solid that is highly soluble in water and commonly used as a buffer component in laboratory and analytical chemistry. It is especially valuable in high-performance liquid chromatography (HPLC), mass spectrometry, and biochemical assays where pH control and minimal ionic interference are essential. This compound also serves as a reagent in organic synthesis, particularly in the preparation of acetamides and other nitrogen-containing compounds. Its extra pure grade ensures excellent consistency, low contaminant levels, and compatibility with sensitive instrumentation. To maintain stability and prevent moisture absorption, it should be stored in a tightly sealed container in a cool, dry environment.

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Category: LABORATORY CHEMICALS Tags: AnalyticalReagent, BufferPreparation, ChromatographyGrade, HighPuritySalt, HPLCCompatible, LCMSReagent, SelectivePrecipitation, VolatileBufferSalt

Description

USES

Primary Uses

Buffer Preparation in Analytical Chemistry
- Widely used to prepare acetate buffer systems for pH control in HPLC, electrophoresis, and titrations.
Reagent in Mass Spectrometry (LC-MS/HPLC-MS)
- Acts as a volatile buffer component in mobile phases for mass spectrometric detection of biomolecules.
Protein and Enzyme Studies
- Maintains pH in biochemical assays and enzyme activity studies, particularly in low-salt conditions.
Precursor in Organic Synthesis
- Used in the synthesis of diazomethane, acetamide, and other small organic molecules in research labs.
Salt for Ionic Strength Control
- Adjusts ionic strength in analytical solutions, helping stabilize reaction conditions in titrations and calibrations.

Secondary Uses

Reagent for Molecular Biology Workflows
- Sometimes used in nucleic acid purification protocols to precipitate DNA or RNA under specific conditions.
Study of Salt Hydrolysis and Buffer Systems
- Ideal for demonstrating the behavior of weak acid/base salts and their buffering capacity in educational labs.
Chromatographic Additive in Ion-Exchange Studies
- Helps in pH modulation and ion interaction in experimental ion-exchange chromatography systems.
Volatile Salt in Sample Preparation
- Leaves minimal residue after drying—useful when samples need to be lyophilized or evaporated post-treatment.
Decomposition and Thermal Stability Testing
- Used in thermogravimetric studies to observe salt decomposition and volatilization behavior.

KEY PRODUCT FEATURES

KEY ATTRIBUTES

1. Basic Identification Attributes

Chemical Name: Ammonium Acetate
CAS Number: 631-61-8
HS Code: 29152990 (Other salts of acetic acid)
Molecular Formula: C₂H₇NO₂ or CH₃COONH₄
Synonyms:
- Acetic acid, ammonium salt
- Ethanoic acid ammonium salt
- Ammonium ethanoate
- NH₄OAc

2. Physical & Chemical Properties

Physical State: Solid (crystalline powder or granules)
Color & Odor: White crystals; faint acetic odor
Boiling Point: Decomposes before boiling
Melting Point: ~114°C (with decomposition)
Density/Specific Gravity: ~1.17 g/cm³
Solubility:
- Water: Very soluble (~148 g/100 mL at 25°C)
- Alcohol: Soluble
pH Level: ~6.6–7.0 (5% solution in water)
Vapor Pressure: Negligible (non-volatile solid)
Flash Point: Not flammable
Autoignition Temperature: Not applicable
Viscosity: Not applicable (solid)

3. Safety & Hazard Attributes

Hazard Class (GHS):
- Not classified as hazardous under normal laboratory conditions
- May cause mild irritation to eyes or respiratory tract (dust)
NFPA Ratings:
- Health: 1
- Flammability: 0
- Reactivity: 0
Exposure Limits:
- No specific OSHA or ACGIH limits
- General nuisance dust limit applies
Reactivity:
- Reacts with strong acids (may release acetic acid fumes)
- Decomposes on heating to form acetamide and water

4. Storage & Handling Attributes

Storage Conditions:
- Store in a cool, dry, well-ventilated area
- Keep tightly sealed to prevent absorption of moisture (hygroscopic)
Incompatible Materials:
- Strong acids, strong oxidizers, nitrates
Container Type:
- HDPE or amber glass containers
Shelf Life & Expiration Date:
- Typically 2 years in sealed containers
Special Handling Requirements:
- Avoid inhalation of dust
- Use gloves and goggles; handle under fume hood if heating

5. Regulatory & Compliance Attributes

Regulatory Status:
- Listed under TSCA, REACH, and other global inventories
Hazard Symbols (GHS Pictograms):
- None required
Transportation Restrictions:
- Not classified as hazardous for transport
Waste Disposal Method:
- Dissolve in water and neutralize if necessary
- Dispose of according to local non-hazardous chemical waste protocols

6. Environmental & Health Impact

Ecotoxicity:
- Low; readily biodegradable
- Ammonium ions may affect aquatic life at high concentrations
Persistence in Environment:
- Rapidly dissociates into ammonium and acetate ions
Carcinogenicity/Mutagenicity:
- Not classified as carcinogenic or mutagenic
Biodegradability:
- Fully biodegradable in soil and water systems

SAFETY HANDLING PRECAUTIONS

SAFETY PRECAUTIONS

Personal Protective Equipment (PPE):
- Wear a lab coat, chemical-resistant gloves (e.g., nitrile), and safety goggles.
- Use a dust mask or respirator when handling powder or in poorly ventilated areas.
Handling:
- Avoid contact with skin, eyes, and clothing.
- Minimize dust generation and accumulation.
- Handle in a well-ventilated laboratory or under a fume hood.
- Keep away from incompatible materials like strong oxidizers and acids.
Storage:
- Store in a tightly sealed container in a cool, dry, well-ventilated area.
- Protect from moisture—ammonium acetate is hygroscopic and may clump if exposed to air.
- Keep separate from strong oxidizing agents and strong acids.
Hygiene Measures:
- Wash hands thoroughly after handling.
- Avoid eating, drinking, or smoking in the lab.
- Clean up spills promptly to avoid exposure.

FIRST AID MEASURES

Inhalation:
- Move the person to fresh air.
- If breathing is difficult or irritation occurs, seek medical attention.
- Rinse nose and mouth with water if needed.
Skin Contact:
- Wash skin with soap and plenty of water.
- Remove contaminated clothing and shoes.
- Get medical help if irritation develops or persists.
Eye Contact:
- Rinse cautiously with water for at least 15 minutes.
- Keep eyelids open and remove contact lenses if easy to do.
- Seek medical advice if irritation persists.
Ingestion:
- Rinse mouth with water.
- Do not induce vomiting.
- If conscious, give water to dilute.
- Seek medical attention, especially if symptoms occur.

FIRE FIGHTING MEASURES

Suitable Extinguishing Media:
- Use water spray, dry chemical powder, alcohol-resistant foam, or carbon dioxide (CO₂).
Specific Hazards:
- Not highly flammable, but decomposes upon heating to produce irritating fumes such as ammonia and acetic acid vapors.
- Fire can intensify in the presence of strong oxidizers.
Protective Equipment for Firefighters:
- Wear full protective gear and a self-contained breathing apparatus (SCBA).
Firefighting Instructions:
- Cool fire-exposed containers with water spray.
- Avoid inhaling fumes.
- Contain water runoff to prevent environmental contamination.