What is Sodium Gluconate?

Sodium gluconate CAS 527-07-1, also known as Gluconic Acid Sodium, Sodium pentahydroxycaproate, is a white or light yellow crystalline powder. Easily soluble in water, slightly soluble in alcohol, insoluble in ether. Its molecular formula is C6H11O7Na, its chemical formula is C6H11NaO7, and its relative molecular mass is 218.14.

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Sodium gluconate is a deeply processed product of glucose and a basic raw material for the preparation of gluconolactone, gluconate (zinc, copper, ferrous salts), etc. It can be used as a nutritional supplement, curing agent, buffer, etc. in the food industry.

This product has good thermal stability and no deliquescence. Due to its excellent chelating properties, it is widely used in various industrial sectors such as water treatment, electroplating, metal and non-metal surface cleaning, and cement production. It is widely used in chemical industry, food, medicine, etc. , light industry and other industries have a wide range of uses.


Bailin Group offers a food as well as a technical grade of Sodium gluconate. Comply with the standards of the Food and Agriculture Organization of the United Nations FAO/WHO; USPXX III version; corporate standards; also according to customer requirements.


Used as steel surface cleaning agent:

If the steel surface requires pot plating, chromium plating, tin plating, or nickel plating to suit special purposes, such as manufacturing tinplate, galvanized sheets, surface chromium plating (electricity), etc., the surface of the steel billet must be strictly cleaned to ensure that the coating is in contact with the steel. The surface is firmly bonded. At this time, adding sodium gluconate to the cleaning agent will achieve a very ideal effect.

Used as cement admixture:

Adding a certain amount of sodium gluconate to cement can increase the plasticity and strength of concrete, and has a blocking effect, that is, delaying the initial and final solidification periods of concrete.

Plasticity and delaying the initial setting time are very important issues in concrete operations. For example, in high-temperature season construction and large-scale engineering operations, delaying the initial setting time is a problem. Sodium gluconate can successfully solve this problem.

In addition, it is difficult to glue oil wells at high temperatures. The concrete added with sodium gluconate becomes plastic within a few hours at a high temperature of 170°C, so it can also satisfactorily solve the above problems. Therefore, sodium gluconate as a cement admixture has been widely used in important construction projects abroad, such as a large number of bridge projects in the Middle East.
In addition, it can also be used in electroplating and film manufacturing industries.

Application of sodium gluconate in construction industry

Concrete is a composite material made from cement, aggregates, admixtures and water. Concrete is the most abundant of all man-made materials. Three-quarters of concrete is aggregate, however the most active ingredient in concrete is cement slurry. The properties and performance of concrete are mainly determined by the properties of cement slurry. Admixtures in concrete can provide some beneficial effects such as accelerating solidification, delaying solidification, causing air to exist in the form of bubbles, reducing water consumption and increasing plasticity, etc.

Sodium gluconate can be used as an admixture in concrete. Its functions in concrete are as follows: water reducing agent and retarder.
Sodium gluconate is generally used alone, but can also be used in combination with other retardants such as carbohydrates and phosphates. Sodium gluconate is a crystalline powder. It is produced under properly defined and controlled conditions. This compound is chemically pure and non-corrosive. Quality is constant. These features ensure reliable and repeatable results in applications.

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Sodium gluconate as water reducing agent

By adding water-reducing admixtures, the water-cement ratio (W/C) can be reduced. By adding sodium gluconate, the following effects can be obtained:

  1. Improve workability. When the water-cement ratio (W/C) remains unchanged, adding sodium gluconate can improve workability. At this time, sodium gluconate acts as a plasticizer. When the added amount of sodium gluconate is below 0.1%, the degree of improvement in workability is directly proportional to the added amount.
  2. Increase strength. While the cement content remains constant the water content in the concrete can be reduced (i.e. the W/C is reduced). When the added amount of sodium gluconate is 0.1%, the amount of water added can be reduced by 10%.
  3. Reduce cement content. The water and cement contents are reduced in the same proportion and the W/C ratio remains unchanged.

Sodium gluconate as retardant

Sodium gluconate can significantly delay the setting time of concrete. When the dosage is less than 0.15%, the logarithm of the initial setting time is directly proportional to the dosage. That is, doubling the dosage will delay the initial setting time to ten times, which reduces the working time from a few to a few. hours to days without sacrificing intensity. This is an important advantage especially on hot days and when it needs to be left in place for an extended period of time.

Used as a special cleaning agent for glass bottles

There are billions of glass bottles in the beverage industry, food industry, and brewing industry every day, such as soda bottles, beer bottles, milk bottles, can bottles, soy sauce bottles, wine bottles, etc. Their cleaning work is a very important matter. Cleaning The formulation of pharmaceutical agents is a difficult technical task.

Used as water quality stabilizer

Because sodium gluconate has excellent corrosion and scale inhibition effects, it is widely used as a water quality stabilizer, such as as a treatment agent for circulating cooling water systems of petrochemical enterprises, low-pressure boilers, and internal combustion engine cooling water systems. Because it has the following specific advantages:

  • It has obvious coordination effect.
  • The corrosion inhibition rate increases as the temperature increases.
  • Strong anti-scaling ability
  • Eliminate public nuisance.
  • Used in medicine
  • It regulates the acid-base balance in the human body to restore normal function of nerves.
  • It can also be used as a food additive for the same purpose.
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