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4-Hydroxybenzoic Acid CAS 99-96-7

Molecular Formula: C7H6O3

Formula Weight: 138.12

ZSpharmac: 4-Hydroxybenzoic Acid Supplier Manufacturers

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Product Name: 4-Hydroxybenzoic Acid
CAS No: 99-96-7
Purity: 99%

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Basic Info

Product Name:4-Hydroxybenzoic Acid
Other Names:P-Hydroxybenzoic Acid
CAS:99-96-7
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Cosmetic Raw Materials
Appearance:White to Ivory Crystalline Powder
EINECS No.:202-804-9
Storage:Store Below +30°C.
Provide:4-Hydroxybenzoic Acid MSDS;
4-Hydroxybenzoic Acid COA

What is 4-Hydroxybenzoic Acid?

P-hydroxybenzoic acid is primarily utilized as the basic material of fine chemical items. Paraben esters, that is, paraben esters, have actually been widely used as preservatives in food, medicine as well as cosmetics. It is also commonly made use of in the prep work of various dyes, Bactericides, color movie and various oil-soluble couplers, etc, a new kind of high-temperature immune polymer p-hydroxybenzoic acid polyester with a wide variety of uses is likewise based on this raw material.

4-Hydroxybenzoic Acid Property

Melting point 

213-217 °C (lit.)

Boiling point 

213.5°C (rough estimate)

density 

1,46 g/cm3

vapor pressure 

0Pa at 20℃

refractive index 

1.4600 (estimate)

Fp 

199 °C

storage temp. 

Store below +30°C.

solubility 

methanol: soluble5%, clear to slightly hazy, colorless to faintly yellow

pka

4.48(at 19℃)

form 

Crystalline Powder

color 

White to ivory

PH

3.3 (1g/l, H2O, 20℃)

Odor

at 100.00 %. phenolic nutty

Odor Type

phenolic

Water Solubility 

5 g/L (20 ºC)

 

4-Hydroxybenzoic Acid Uses

  1. P-hydroxybenzoic acid is usually utilized in organic synthesis, dyes, aromas and various other industries, as well as is furthermore taken advantage of to prepare high-efficiency chemicals.
  2. P-hydroxybenzoic acid is mainly used as the essential basic material of great chemical items. Paraben esters, that is, paraben esters, have actually been thoroughly utilized as chemicals in food, drug and likewise cosmetics. It is also frequently used in the prep work of numerous dyes, Bactericides, shade film and different oil-soluble couplers, and so on, a new kind of high-temperature resistant polymer p-hydroxybenzoic acid polyester with a wide variety of uses is likewise based on this resources.
  3. P-hydroxybenzoic acid is an extensively made use of basic material for natural synthesis, particularly its esters, including methyl p-hydroxybenzoate (paraben A), ethyl ester (paraben B), propyl ester, butyl ester, isopropyl ester, isobutyl ester, can be made use of as food additives, made use of in soy sauce, vinegar, sodas (other than sodas), fruit flavoring reps, vegetables and fruits, marinaded items, etc reps along with fungicides and so on. P-hydroxybenzoic acid is also taken advantage of as an intermediate for dyes and also chemicals. It is used in the synthesis of organophosphorus insecticides GYAP as well as CYP in chemicals; it is used in the dye market to manufacture heat-sensitive dyes; it can additionally be utilized in shade film along with man-made oil-soluble coupler “538” in addition to nylon 12. Resources for the production of plasticizers. Additionally, it is also used in liquid crystal polymers and plastics.

P-Hydroxybenzoic Acid Production Method

There are great deals of manufacturing techniques for p-hydroxybenzoic acid. Potassium phenate carboxylation strategy is much better for industrial manufacturing. Regulations. Add concerning 40% potassium hydroxide choice as well as phenol right into the reaction pot and likewise mix, stir at 100 ° C for 0.5 h, till the free base of the potassium phenate remedy is 0.3-1.2%. Home home heating, dehydration at normal pressure, in addition to transforming to dehydration under decreased pressure when the inner temperature degree gets to 140 ° C, along with distilling water at a pressure of 10.6 kPa for concerning 0.5-1h up until the internal temperature level reaches over 170 ° C. Include the solvent phenol for azeotropic dehydration, as well as additionally finish the dehydration at 200 ° C(2.67 kPa) to get a compound salt of potassium phenate as well as phenol. Continue to warm up the prepared compound salt to 220-230 ° C, pass in cleansed anhydrous carbon dioxide, preserve the pressure at 0.5 MPa, react for 2.5 hours, cool to 200 ° C along with include phenol, maintain mixing for thirty minutes, as well as afterwards recover phenol under decreased pressure to do. Then co2 is introduced for the 2nd carboxylation, which takes about 2 hrs. After carboxylation, recuperate phenol, cool down to listed below 180 ° C, include water to dissolve, along with get carboxylation remedy (dipotassium p-hydroxybenzoate). Consist of sulfuric acid gradually to the carboxylation solution, reduce the effects of listed below 70 ° C to pH 6.7. Stylish and filter to eliminate potassium sulfate, recrystallize the gotten raw filter cake with water, as well as decolorize with triggered carbon to obtain p-hydroxybenzoic acid with a web content of more than 99%. Dipotassium p-hydroxybenzoate can additionally be gotten by transposition of dipotassium salicylate. As a result, p-hydroxybenzoic acid can in addition be obtained industrially from salicylic acid via salification, translocation, and additionally neutralization, nevertheless the price is rather high. In addition to that, p-toluenesulfonyl chloride, a spin-off in the manufacturing of saccharin, can also be gotten with ammoniation, oxidation, acid rainfall, alkali combination, as well as acid rainfall. The yield of this method is reduced, the expenditure is high, as well as additionally the by-product of saccharin generally includes toxic contamination o-sulfonamidotoluene.

Safety of P-Hydroxybenzoic Acid

There are great deals of manufacturing techniques for p-hydroxybenzoic acid. Potassium phenate carboxylation strategy is much better for industrial manufacturing. Regulations. Add concerning 40% potassium hydroxide choice as well as phenol right into the reaction pot and likewise mix, stir at 100 ° C for 0.5 h, till the free base of the potassium phenate remedy is 0.3-1.2%. Home home heating, dehydration at normal pressure, in addition to transforming to dehydration under decreased pressure when the inner temperature degree gets to 140 ° C, along with distilling water at a pressure of 10.6 kPa for concerning 0.5-1h up until the internal temperature level reaches over 170 ° C. Include the solvent phenol for azeotropic dehydration, as well as additionally finish the dehydration at 200 ° C(2.67 kPa) to get a compound salt of potassium phenate as well as phenol. Continue to warm up the prepared compound salt to 220-230 ° C, pass in cleansed anhydrous carbon dioxide, preserve the pressure at 0.5 MPa, react for 2.5 hours, cool to 200 ° C along with include phenol, maintain mixing for thirty minutes, as well as afterwards recover phenol under decreased pressure to do. Then co2 is introduced for the 2nd carboxylation, which takes about 2 hrs. After carboxylation, recuperate phenol, cool down to listed below 180 ° C, include water to dissolve, along with get carboxylation remedy (dipotassium p-hydroxybenzoate). Consist of sulfuric acid gradually to the carboxylation solution, reduce the effects of listed below 70 ° C to pH 6.7. Stylish and filter to eliminate potassium sulfate, recrystallize the gotten raw filter cake with water, as well as decolorize with triggered carbon to obtain p-hydroxybenzoic acid with a web content of more than 99%. Dipotassium p-hydroxybenzoate can additionally be gotten by transposition of dipotassium salicylate. As a result, p-hydroxybenzoic acid can in addition be obtained industrially from salicylic acid via salification, translocation, and additionally neutralization, nevertheless the price is rather high. In addition to that, p-toluenesulfonyl chloride, a spin-off in the manufacturing of saccharin, can also be gotten with ammoniation, oxidation, acid rainfall, alkali combination, as well as acid rainfall. The yield of this method is reduced, the expenditure is high, as well as additionally the by-product of saccharin generally includes toxic contamination o-sulfonamidotoluene.

About Products:
If you need P-Hydroxybenzoic Acid as a cosmetic raw material, please contact our service staff directly, and we will provide you with high-quality products at the best price.
As an experienced P-Hydroxybenzoic Acid manufacturer and supplier, ZSpharmac will provide P-Hydroxybenzoic Acid raw materials for customers all over the world for a long time.
Over the years, the company has been adhering to the spirit of “integrity management, strict quality control, customer first”, and has won unanimous praise from domestic and foreign customers.

Company Profile and Corporate Culture

Company Profile:

ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .

The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .

The company insists on the spirit of “sincere management, strict quality control, customer as god” , get consistent high praise from customers at home and abroad.

Corporate Culture:

OUR MISSION
Help China Chemicals to benefit the happiness of human life
OUR VISSION
Become the most trusted chemical supplier in the world
OUR BUSINESS PHILOSOPHY
Striver – oriented, enrich employees, customer first, deep service, seek development
OUR VALUES
Be prepared for danger in times of peace, forge ahead actively, unity and cooperation, and be brave to fight

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Cosmetic raw materials
  • Products/Service:Cosmetic raw materials (flavors and fragrances,antioxidant products, moisturizing and hydrating, whitening agents, cosmetic additives)
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.

Service

Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.

 

After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.

FAQ

Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.

 

HOW TO CONFIRM THE PRODUCT QUALITY BEFORE PLACING ORDERS?

You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.

Shipping

1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

Get 4-Hydroxybenzoic Acid Quotation