Agrochemical Intermediates 2 6-Dihydroxybenzoic Acid Goo Price

• CAS No.: 303-07-1
• Formula: C7h6o4
• EINECS: 206-134-8
• Type: Agrochemical Intermediates
• Appearance: Powder
• Quality: Industrial
• Model NO.: SH-26
• Colour: White or Light Yellow
• Content: ≥99%
• Molecular Weight: 154.113
• Melting Point: 154-155ºC
• Boiling Point: 343.7°c at 760 Mmhg
• Flashing Point: 175.8°c
• Vapour Pressure: 2.65e-05mmhg at 25°c
• Transport Package: Draft Bag or Fiber Can
• Specification: 25kgs
• Trademark: SHUANGHE
• Origin: China

Product Description

1.Product introduction

Name: 2,6-Dihydroxybenzoic acid

Molecular formula C7H6O4

The molecular weight of 154.12

CAS NO. 303-07-1
 

Appearance	white (or light yellow) crystal
Melting point	165 °C (dec.)(lit.)
Density	1.6± 0.1g /cm³
boiling point	343.7±32.0 ºC at 760 mmHg
Molecular weight	154.120
flash point	175.8±21.6 ºC
PSA	77.76000
vapor pressure	0.0± 0.8mmHg at 25ºC
Refractive index	1.671

 

2. Application

    1: used as pesticide and pharmaceutical intermediates

 

    2: 2, 6-dihydroxy benzoic acid is herbicide dipyrioxyl ether, pyrioxyl sulfide and pyrioxyl gram, pyrioxyl ether and other intermediates.

3. produce method

Method one: The preparation method is to dissolve resorcinol in ethanol, add anhydrous potassium carbonate in the solution, heat to 140ºC, through carbon dioxide (carbon dioxide pressure 1400kPa) reaction for 4h, get 2, 6-dihydroxy benzoic acid and 2, 4-dihydroxy benzoic acid mixture (63.1%2, 6-dihydroxy benzoic acid, 36.9%2, 4-dihydroxy benzoic acid), adding water, then adding sulfuric acid to adjust the mixture solution pH=6, and then steam part of the mixture of ethanol and water, the residual at 98 ~ 100ºC reflux for 3h, decomposition of 2, 4-dihydroxy benzoic acid. When the decomposition reaction is carried out, the pH value of the reaction mixture is maintained at 6, and sulfuric acid is appropriately added to adjust the pH value. When the decomposition reaction is complete, then add sulfuric acid in the mixture to make the pH value reached 3, there is insoluble matter formation, filtration separation, and then continue to add sulfuric acid in the filtrate to make the pH value reached 1, cooling to 5ºC, the formation of 2, 6-dihydroxybenzoic acid crystallization, filtration, crystallization, washing with water, drying at 70ºC, the finished product.

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