Gluconic Acid

CAS Registry Number:

[526-95-4]

Chemical Formula:

C6H12O7

E-Number:

E574

General Information

Gluconic acid is a mild organic acid, neither caustic nor corrosive and with an excellent sequestering power. Non-toxic and readily biodegradable (98 % after 2 days), it occurs naturally in plants, fruits and other foodstuffs such as wine (up to 0.25 %) and honey (up to 1 %). Gluconic acid is prepared by fermentation of glucose, whereby the physiological d-form is produced.

In all recipes where gluconic acid is used together with sodium hydroxide, we recommend the direct use of sodium gluconate, the dry sodium salt of gluconic acid or the special product NAGLUSOL®.

Gluconic acid has versatile properties through being a polyhydroxycarboxylic acid, with both hydroxyl and carboxyl groups which can react.

Concentrated solutions of gluconic acid contain some lactone (GdL), the neutral cyclic ester, which is less soluble in the cold and possesses no actual acid properties. About 5 % of GdL are present in the 50 % gluconic acid solution at room temperature.

The outstanding property of gluconic acid is its excellent chelating power, especially in alkaline and concentrated alkaline solutions. In this respect, it surpasses all other chelating agents, such as EDTA, NTA and related compounds. Calcium, iron, copper, aluminium and other heavy metals are firmly chelated in alkaline solution and masked in such a way that their interferences are eliminated.

Gluconic acid is stable at the boiling point even of concentrated alkaline solutions. However, it is easily and totally degraded in waste water treatment plants (98 % after 2 days).

Specification

Jungbunzlauer gluconic acid technical grade is supplied as a 50 % aqueous solution in water.

Jungbunzlauer gluconic acid food grade is supplied in accordance with the latest requirements Commission Regulation (EU) No. 231/2012. Gluconic acid food grade is offered as a 50 % aqueous solution.

Jungbunzlauer gluconic acid is available in liquid form as a 50 % aqueous solution.

Jungbunzlauer gluconic acid is supplied in bulk, in intermediate bulk containers (IBCs) with 1250 kg net weight (1000 kg net for the 50 % solution), and in drums with 250 kg net weight. Other packaging types are available on request.

Properties
  • Non-toxic
  • Easily biodegradable (98 % after 2 days)
  • Mild taste
  • Least corrosive organic acid

Main functions

  • Excellent chelating agent
Applications

Food

  • Confectionery
  • Dairy
  • Flavours
  • Ready Meals, Instant Food
  • Sauces, Dressings, Seasonings

Beverages

  • Carbonated Soft Drinks
  • Instant Drinks, Syrups
  • RTD Tea and Coffee
  • Sports and Energy Drinks
  • Waters

Personal Care

  • Hair Care
  • Oral Care
  • Skin Care
  • Soap and Bath Products

Cleaners & Detergents

  • Industrial Cleaners
  • Surface Care

Industrial Applications

  • Agrochemicals, Fertilisers
  • Fine Chemicals
  • Metal Surface Treatment
  • Textile, Leather

Healthcare

  • OTC, Food Supplements
Legal aspects