Ammonium benzoate
[CAS# 1863-63-4]

Identification

• Classification: Chemical reagent >> Organic reagent >> Amine salt (ammonium salt)
• Name: Ammonium benzoate
• Synonyms: Benzoic acid ammonium salt
• Molecular Formula: C₇H₉NO₂
• Molecular Weight: 139.15
• CAS Registry Number: 1863-63-4
• EC Number: 217-468-9
• SMILES: C1=CC=C(C=C1)C(=O)[O-].[NH4+]

Properties

• Melting point: 192-198 ºC (decomp.) (Expl.)
• Flash point: 110 ºC (Expl.)
• Water solubility: soluble (Expl.)

Safety Data

• Hazard Symbols: GHS07 Warning
• Hazard Statements: H302-H315-H319-H335
• Precautionary Statements: P261-P264-P264+P265-P270-P271-P280-P301+P317-P302+P352-P304+P340-P305+P351+P338-P319-P321-P330-P332+P317-P337+P317-P362+P364-P403+P233-P405-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Acute toxicity	Acute Tox.	4	H302
Eye irritation	Eye Irrit.	2	H319
Skin irritation	Skin Irrit.	2	H315
Specific target organ toxicity - single exposure	STOT SE	3	H335

Discovory and Applicatios

Ammonium benzoate is a white crystalline compound with the chemical formula NH₄C₆H₅CO₂. It is the ammonium salt of benzoic acid and is widely used in various industries due to its versatility and relatively low toxicity. The compound has been recognized for its various applications, particularly in the pharmaceutical and food industries, as well as in chemical syntheses. Its discovery and use date back to the early 19th century, and since then, it has found roles in preserving food, treating certain medical conditions, and serving as a precursor for other chemicals.

The discovery of ammonium benzoate can be traced to the early study of benzoic acid, which was isolated from gum benzoin in the 16th century. Over the years, scientists developed methods to synthesize benzoic acid from various natural sources, and it was eventually identified as a key component of many organic compounds. The ammonium salt of benzoic acid, ammonium benzoate, was first synthesized as researchers explored ways to neutralize the acid with ammonia. The synthesis of ammonium benzoate became a more formalized chemical process in the 19th century, when chemists began understanding the properties of organic salts and their various applications.

One of the primary uses of ammonium benzoate is in the pharmaceutical industry. It is used as an intermediate in the synthesis of other drugs, particularly those that require benzoate moieties for their chemical activity. The compound is also used in the treatment of certain medical conditions, particularly for its ability to help treat urinary tract infections (UTIs). Ammonium benzoate has mild antiseptic properties and can be used to alkalize the urine, thereby reducing the acidity of urine and helping to relieve the symptoms of urinary tract infections. In addition, ammonium benzoate has been explored for its potential use in treating kidney stones, as it can dissolve certain types of crystals in the urinary tract.

In the food industry, ammonium benzoate has been used historically as a food preservative. It is effective against the growth of fungi and bacteria, making it useful in preserving acidic foods such as beverages, fruit juices, and sauces. However, the use of ammonium benzoate in food products is now limited due to concerns over its potential for harmful effects when consumed in large quantities. It has been subject to regulatory guidelines, particularly in the United States and Europe, which set maximum allowable concentrations in food. Despite these concerns, it remains an important preservative for some niche food products, particularly in countries where other preservatives are not as widely used.

Ammonium benzoate also plays a role in certain chemical manufacturing processes. It can be used in the production of other benzoate salts, which are useful as plasticizers, stabilizers, and other additives in the manufacture of plastics, paints, and coatings. In addition, it can serve as a precursor for the synthesis of aromatic compounds that are used in the production of dyes, perfumes, and other industrial chemicals. Its role as a reagent in organic chemistry has made it an important compound in chemical synthesis and industrial applications.

While ammonium benzoate is relatively non-toxic in small amounts, it is important to note that excessive consumption can lead to health problems, including gastrointestinal distress and potential allergic reactions. The compound is known to have low toxicity when ingested in small amounts, but higher concentrations could lead to more severe health risks. In high doses, ammonium benzoate can cause a range of symptoms, including nausea, vomiting, and dizziness. Because of these potential risks, its use in food products is highly regulated, and alternative preservatives are preferred in many regions.

In conclusion, ammonium benzoate is a versatile compound with a wide range of applications in industries such as pharmaceuticals, food preservation, and chemical manufacturing. While its use has declined in some sectors due to health concerns, it remains an important substance in others. The discovery of ammonium benzoate, along with its various uses and applications, underscores the ongoing importance of this compound in modern industry and chemistry. However, its potential health risks mean that care must be taken when using it in products intended for human consumption.

References

2024. Voltage oscillations during anodizing process of aluminum and their suppression. Journal of Materials Science: Materials in Electronics.
DOI: 10.1007/s10854-024-12320-1

2015. Improving the Sensitivity of Matrix-Assisted Ionization (MAI) Mass Spectrometry Using Ammonium Salts. Journal of The American Society for Mass Spectrometry.
DOI: 10.1007/s13361-015-1205-z

2010. Packing motifs in organic ammonium carboxylate salts: extension of the ring-stacking and ring-laddering concepts. CrystEngComm.
DOI: 10.1039/c000922a