Gluconic acid

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Gluconic acid gluconic acid， The aldehyde group at position 1 of glucose is replaced by carboxyl group to form Aldose sugar acid （aldonic acid）。 Type D is through mold Aspergillus niger (Asp ergilus niger, etc.) and wood acetobacter Gluconic acid produced in large quantities by the fermentation of glucobacillus (Acetobacter xylinum, Gluconobacter, etc.). Obtained from Penicillium notatum Glucose oxidase It can oxidize β - D-glucose into δ- Glucolactone 。

Chinese name: Gluconic acid^[5]
Foreign name: Gluconic acid
Alias: D-gluconic acid
chemical formula: C6H12O7^[5]

molecular weight: one hundred and ninety-six point one five five^[5]
CAS login number: 526-95-4^[5]
EINECS login number: 208-401-4^[5]
Melting point: 131 ℃

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Chinese name	Gluconic acid
English name	Gluconic acid
Chinese alias	D-gluconic acid
English alias	D-Gluconic acid solution; Gluconicacidaqsoln; D-Gluconic acid
CAS No	526-95-4
EINECS No	208-401-4
Molecular formula	C six H twelve O seven
molecular weight	one hundred and ninety-six point one six
InChI	InChI=1/C6H12O7/c7-1-2(8)3(9)4(10)5(11)6(12)13/h2-5,7-11H,1H2,(H,12,13)/t2-,3-,4+,5-/m1/s1
melting point	131℃
density	1.24 (50-52% aq.)
purpose	Used as protein coagulant and Food preservatives
Safety terminology	S26 :In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.; S37/39 :Wear suitable gloves and eye/face protection.;
Risk terminology	R36/37/38 :Irritating to eyes, respiratory system and skin.;
Dangerous goods sign	Xi :Irritant;
downstream	Gluconic acid - δ - lactone

^[1] Related category: Biochemistry; Glucose;Sugar Acids;Sugars;Dextrins、Sugar & Carbohydrates; Food and feed additives; Food acidifier; Biochemical reagent; food additives

Mol file: 526-95-4-mol^[2]

security information

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Dangerous goods sign Xi, C

Hazard Category Code 36/37/38-34

Safety instructions 37/39-26-45-36/37/39

Dangerous goods transportation No. 3265^[5]

WGK Germany -

RTECS No. LZ5057100

HazardClass 8

PackingGroup III

Toxic Substances Data 526-95-4^[2]

Product use

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Protein coagulants and food preservatives. Used to produce gluconate such as Sodium gluconate 、 Potassium gluconate , calcium gluconate, etc.^[1]

Production method

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Oxidized by glucose or Biological fermentation Can be made Gluconic acid 。^[1]

glucic acid

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Gluconic acid is also called dextric gluconic acid. Under the action of weak oxidant or enzyme, the aldehyde group in the molecule of glucose is oxidized to carboxyl. Its 6-phosphate is oxidized and decomposed by glucose in organism（ Pentose phosphate pathway ）Intermediate of. It forms soluble salts with metal ions such as calcium and zinc, and is used as nutrition and medicine.^[2]

Physical property data

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Character: yellow to brown liquid

Density (g/cm3, 25/4 ℃): 1.24

Relative vapor density (g/cm3, air=1): not determined

Melting point (º C): 131

Refractive index: undetermined

Flash point (º C): undetermined

Specific rotation (º): undetermined

Autoignition point or ignition temperature (º C): undetermined

Vapor pressure (kPa, 25 º C): undetermined

Saturated vapor pressure (kPa, 55.1 º C): Not determined

Combustion heat (KJ/mol): 113.2^[5]

Critical temperature (º C): undetermined

Critical pressure (KPa): undetermined

Logarithmic value of oil-water (octanol/water) partition coefficient: undetermined

Upper explosive limit (%, V/V): undetermined

Lower explosive limit (%, V/V): undetermined

Solubility: soluble in water, slightly soluble in alcohol, insoluble in ethanol and most organic solvents.^[3]

toxicology data

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Acute toxicity:

Main irritant effects:

On the skin: Irritating to the skin and mucous membrane.

Above the eyes: effects of irritation

Sensitization: No known sensitization.^[3]

Ecological data

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Generally, it is not harmful to water. Do not discharge materials into the surrounding environment without government permission.^[3]

Molecular structure data

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Molar refractive index ：38.91^[5]

Molar volume (cm3/mol): 111.2^[5]

Isotonic specific volume (90.2K): 365.8^[5]

Surface tension (dyne/cm): 116.9^[5]

Polarization rate (10-24cm3): 15.42^[3]

Calculate chemical data

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Reference value for drainage parameter calculation (XlogP): - 3.4^[5]

Number of hydrogen bond donors: 6^[5]

Number of hydrogen bond receptors: 7^[5]

Number of rotatable chemical bonds: 5^[5]

Number of tautomers:

Topological molecule polar surface area (TPSA): 139^[5]

Number of heavy atoms: 13^[5]

Surface charge: 0^[5]

Complexity: 170^[5]

Isotope atom Quantity: 0^[5]

Determine the number of atomic structure centers: 4^[5]

Number of uncertain atomic structure centers: 0^[5]

Determine the number of chemical bond structure centers: 0^[5]

Number of uncertain chemical bond structure centers: 0^[5]

Number of covalent bond units: 1^[3]

Properties and stability

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Slightly acidic crystal. Melting point 131 ℃, relative density of 50% aqueous solution 1.24 (25 ℃). Soluble in water, slightly soluble in alcohol, insoluble in ethanol and most organic solvents.

This product is almost non-toxic, non corrosive and non irritating smell.^[3]