Ammonium acetate 631-61-8

Synonyms: Ammonium ethanoate
Molecular Formula: CH3COONH4
Molecular Weight: 77.08
Hazard Class: general cargo
HS Code: 2915299090
Grade:Food grade: over 99%, Industrial grade: over 99%, Analytical grade: 99%, Chemical grade: 97%

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Model:
631-61-8
Brand:
bosschemical
Code:
631-61-8

Product Description

What is of Ammonium acetate CAS 631-61-8?

Ammonium acetate (formula: NH₄CH₃CO₂) is a highly water-soluble, hygroscopic white crystalline solid. It is primarily used as a pH buffer in biochemistry and analytical chemistry, as a protein precipitant, and as a catalyst in organic synthesis.

Specification

Specification	Reagent grade (GB/T 1292-2008)
Specification	GR (Guaranteed Reagent)	analytical pure	chemical pure
Content(CH₃COONH₄),w/% ≥	98.0	98.0	97.0
pH value(50g/L,25℃)	6.7-7.3	6.5-7.5	6.5-7.5
Clarity Test/No ≤	2	3	5
Insoluble Substances,w/% ≤	0.002	0.005	0.01
Ignition Residue, w/% ≤	0.005	0.005	0.01
Moisture ,w/% ≤	2.0	————	———
Chlorides (Cl),w/% ≤	0.0005	0.0005	0.001
Sulfates(SO₄),w/% ≤	0.001	0.002	0.005
Nitrates(NO₃),w/% ≤	0.001	0.001	———
Phosphates (PO₄),w/% ≤	0.0003	0.0005	———
Magnesium (Mg),mg/kg ≤	0.0002	0.0004	0.001
Calcium(Ca),w/% ≤	0.0005	0.001	0.002
Iron (Fe), w/% ≤	0.0002	0.0005	0.001
Heavy metals (Pb). w/% ≤	0.0002	0.0005	0.001
Reduction of Potassium Permanganate,w/% ≤	0.0016	0.0032	0.0032

Application Scenarios:

Analytical Grade: Ammonium acetate is the most commonly used eluent buffer additive.

1. Volatile Buffer for Mass Spectrometry (MS): In liquid chromatography-mass spectrometry (LC-MS) analysis, the eluent needs to be vaporized and ionized before entering the mass spectrometer for detection. Ammonium acetate decomposes into ammonia and acetic acid (both gases) at high temperatures, completely evaporating without leaving any solid residue on the mass spectrometer nozzle and ion source, making it the "golden buffer" for mass spectrometry analysis.

2. Protein Precipitation and Nucleic Acid Purification: In biochemistry, high concentrations of ammonium acetate are often used to precipitate and recover DNA or RNA. Compared to sodium acetate, using ammonium acetate to precipitate nucleic acids reduces the co-precipitation of coenzymes or free nucleotides, resulting in purer subsequent enzymatic reactions.

Industrial Grade - Dyeing Leveling Agent in the Printing and Dyeing Industry:

In textile dyeing processes (especially acid dyeing of wool or silk), as the temperature rises during dyeing, ammonium acetate slowly volatilizes ammonia, causing the pH of the dye bath to decrease slowly and evenly. This gradual pH change allows the dye to adhere very evenly to the fabric, preventing color spots and color variations.

Food Grade - Meat Preservation and Preservation

In specific processing stages in the food industry, it is used as an acidity regulator. Due to its antibacterial properties, it has also been used as a relatively mild preservative.