Details:

Gallic acid

Production capacity: 2000 T/Year

Other name：gallnut acid

Chemical name：3，4，5-Trihydroxybenzoic acid

Mol. form and Mol. wt.： C₇H₈O₆   188.13
Description：A white or white crystalline powder. Soluble in 85 proportions of water, 6 alcohol and 2 boil-water, slightly soluble in ether.
  Specification: Comply with the requirements of European-93 (1-class) Standard, JIS (1-class)standard, U.S.P.21 edition(1985), superior grade.

Technical data:

Purity:            %   ≥99

Sulfate：         ppm  ≤10

Tannic acid test:   ppm  ≤1.0

Loss on drying:    %   ≤10.0

Residue on ignition: %   ≤0.1

Turbidity:         ppm ≤10

Color number：    fan  ≤200

Usage：Mainly used in medicine、dyestuff、chemical and synthesis industry ,also used in analysis in rare metal.  

Storage：keep in a well-closed container.

Packing: weave bag with plastic bag inside, N.W. 25kg/bag.            

PYROGALLIC ACID

Production capacity: 600 T/Year

Other name：Pyrogallol, 1,2,3 - Benzenetriol
Chemical name：1,2,3 - Trihydroxybenxene 
Mol. form and Mol .wt.：CH₆(OH)₃  126.11
Description：A lustrous crystalline white powder, Soluble in 2 proportions of water, 1 alcohol and 2 ether.
Specification：Comply with the requirements both U.S.A." Reagent

Chemical and Standard" by Joseph Rosin Fifth-edition and JIS K8780 standard.

Technical data:        tech grade          CP grade         AR grade

Appearance:              White powder           White powder        White powder

Purity %:                   ≥99.2              ≥99.5           ≥99.8

Water solubility:             clear                  clear               clear

Melting point ℃ :           ≤131~135           ≤132~135       ≤131~135

Residue on ignition %:        ≤ 0.025            ≤ 0.02          ≤ 0.02

Chloride %:                 ≤ 0.002            ≤ 0.001         ≤ 0.001

Sulphate %:                 ≤ 0.005            ≤ 0.005         ≤ 0.005

Heavy metal ppm:            ≤ 5                ≤ 5            ≤ 5
Usage: used in analyse&mensuration of oxygen, antimony, bismuth, cerium, iron, molybdenum, tantalum and niobium etc; also widely used in pharmaceutical, dyestuff, chemical and food industries; developer in photography.
Storage：keep in a well-closed container.

Packing：circinal-paper barrel with plastic bag inside, N.W. 25kg/bag.               

PROPYL GALLATE

Production capacity: 800 T/Year

Other name：Gallic acid progal, PG
Chemical name：Propyl - 3,4,5 - Trihydroxybenzoate 
Mol. form and Mol. wt.：C₁₀H₁₂O₅；212.21
Description：A white to creamy-white crystalline powder; odourless.

Soluble in 1000 proportions of water, 3 alcohol, 3 aether, and 2000 arachis oil.
  Specification：Comply with the requirement of both state standard GB3626-82 and B.P.1980 edition, U.S.P.XXI(1985)edition; U.S.A.FCC-IV standard.

Technical data:

Appearance: white or almost white crystalline powder

Purity:            %   98-102

Melting point:     ℃   146--150

As:              %   ≤0.0003

Heavy metal:      %   ≤0.001

Loss on drying:    %   ≤0.5

Residue on ignition:  %   ≤ 0.1

Colour number:     fan   ≤50
Usage: mainly used as antioxidant additive in fattiness, oleaginous foods and

medicinal preparations.

Storage：Escape from light, storing in the airtight vessel, prevent from contacting with metal .

Packing：circinal-paper barrel with plastic bag inside, N.W. 25kg/drum.                            Chinese name: gallic acid in Chinese alias: times acid;Times acid;Three, four, five, three hydroxyl benzoic acid;Three, four, five, three hydroxyl benzoic acid;Gallic acid.See more Chinese alias English name: gallic acid English alias: BETZ 0276;Kyselinagallova;Gallic Acid.Gallic acid.Gallic;Read more English nickname CAS no. : 149-91-7 molecular formula: C7H6O5 molecular weight: 170.12000 the precise quality: 170.02200 PSA: LogP 97.99000:0.50160

Physical and chemical properties
Appearance and properties: white crystalline powder density: 1.694 melting point: 252 ° C (dec) (lit) boiling point: DHS C at 760 mmHg flash point 501.1:271 DHS C refractive index: 1.73 water solubility: 12 g/L cold water storage conditions: low temperature warehouse, ventilated, dry steam pressure: 7.32 e-11 mmHg at 25 ° C
Safety information
Customs code: 2918290000 WGK Germany: 2 dangerous category code: 37/38 R36 / safety instructions: S26 - S36 - S24: no. 25 rtecs LW7525000 dangerous mark: Xi: Irritant
Check all production methods and purposes
Production methods


From Chinese gall.The main components in Chinese gall tannins, hydrolyzed tannins, soluble in hot water, has the astringency, is a kind of amorphous and complex organic compounds.Chinese gallnut tannins consists of gallic acid, double acid and glucose in the form of glucoside or ester formation of the complex mixture.Tannic acid by the pressurized hydrolysis is generate gallic acid and glucose.When hydrolyzed into Mr With gallic acid ester, again by double gallic acid ester hydrolysis into gallic acid, hydrolysis temperature is 133-135 ℃, pressure is 0.18-0.2 MPa.Starting from the booster to 0.18 MPa reaction for 2 h at the end.Compared with atmospheric hydrolysis, can save, sulfuric acid and steam production capacity can be increased by 25%.


use

Has antibacterial effect, but in the treatment of bacillary dysentery.Have convergence, hemostatic, anti-diarrhea effect.Can be used as a preservative.To the preparation of pyrobitumen medium of gallic acid, medicine, ink, dye and explosion-proof agent, etc.Also used as a developer and detect free inorganic acid, dihydroxyacetone, alkaloid and metal such as analytical reagent.