Ammonium acetate

IUPAC Name: Acetic acid; azane
Synonyms of Ammonium acetate (CAS NO.631-61-8): Acetic acid, ammonium salt ; Acetic acid, ammonium salt (1:1)
CAS NO: 631-61-8
Molecular Formula: C₂H₇NO₂
Molecular Weight: 77.08
Molecular Structure:
EINECS: 211-162-9
H bond acceptors: 2
H bond donors: 1
Freely Rotating Bonds: 0
Polar Surface Area: 26.3 Å²
Flash Point: 40 °C
Enthalpy of Vaporization: 23.7 kJ/mol
Boiling Point: 117.1 °C at 760 mmHg
Vapour Pressure: 13.9 mmHg at 25°C 
Melting Point: 110-112 °C (dec.)(lit.)
Storage temp: 2-8°C
Solubility H₂O: 1 M at 20 °C, clear, colorless
Sensitive: Hygroscopic
Appearance: white adhering crystals
Product Categories of Ammonium acetate (CAS NO.631-61-8): Pharmaceutical Intermediates;Inorganic Chemicals;ACS GradeSynthetic Reagents;Essential Chemicals;Routine Reagents;Buffers A to ZBiological Buffers;SigmaUltra Buffers;BioUltraProtein Structural Analysis;Molecular Biology;Ammonium Salts;AmmoniumMetal and Ceramic Science;Salts;

 Ammonium acetate (CAS NO.631-61-8) has a number of distinctive properties since it is the salt of a weak acid and a weak base. Though Ammonium acetate is occasionally employed as a biodegradable de-icing agent, it is often used with acetic acid to create a buffer solution, one that can be thermally decomposed to non-ionic products. Besides, Ammonium acetate also is useful in the Knoevenagel condensation in organic synthesis.
 Ammonium acetate is relatively unusual example of a salt that melts at low temperatures. It can be used with distilled water to make a protein precipitating reagent. And it is often used as an aqueous buffer for ESI mass spectrometry of proteins and other molecules. Because Ammonium acetate is volatile at low pressures, it has been used to replace cell buffers with non-volatile salts, in preparing samples for mass spectrometry.

Reported in EPA TSCA Inventory.

Safety Information about Ammonium acetate (CAS NO.631-61-8):
Safety Statements: 24/25
S24/25: Avoid contact with skin and eyes.
RIDADR: UN 9079
WGK Germany: 3
RTECS: AF3675000
F: 3
HS Code: 29152900
Poison by intravenous route. Moderately toxic by intraperitoneal route. When heated to decomposition it emits toxic fumes of NO_x and NH₃.

General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
Extinguishing Media: Use water spray, dry chemical, carbon dioxide, or chemical foam.
Handling: Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Avoid ingestion and inhalation.
Storage: Store in a cool, dry place. Store in a tightly closed container.