Zhishang Chemical

Welcome to Zhishang Chemical      +86-176 5311 3209     Simon@sdzschem.com

Zhishang Chemical
Close this search box.

2,4-Dihydroxybenzophenone CAS 131-56-6

Molecular Formula: C13H10O3

Formula Weight: 214.22

ZSpharmac: 2,4-Dihydroxybenzophenone Supplier

Product Name: 2,4-Dihydroxybenzophenone
CAS No: 131-56-6
Purity: 99%

Navigation Bar

Basic Info

Product Name:2,4-Dihydroxybenzophenone
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Cosmetic Raw Materials
Appearance:Yellow Crystalline Powder
EINECS No.:205-029-4
Storage:Store Below +30°C.
Provide:2,4-Dihydroxybenzophenone MSDS;
2,4-Dihydroxybenzophenone COA

What is 2,4-Dihydroxybenzophenone?

UV absorber is a kind of light stabilizer, which can take in the ultraviolet part of sunshine along with fluorescent resource of light without transforming itself. Under sunlight as well as fluorescent light, plastics as well as numerous other polymer products create auto-oxidation reactions as a result of the activity of ultraviolet rays, causing destruction of polymers and also damage of look as well as additionally mechanical residential properties. After adding UV absorber, it can distinctively absorb this high-energy UV, and also turn it right into harmless energy for launch or use. As a result of the various sort of polymers, the wavelengths of ultraviolet rays that make them break down are also different. Numerous ultraviolet absorbers can soak up ultraviolet rays of different wavelengths. When making use of, the ultraviolet absorber ought to be picked according to the sort of polymer.

The UV absorber must satisfy the listed here problems: ① It can soak up ultraviolet rays extremely (specifically with a wavelength of 290-400nm); ② It has great thermal safety, it will certainly not change as a result of warmth additionally during processing, as well as its thermal volatility is little; ③ Chemically secure Outstanding compatibility, no negative reaction with the product parts in the product; ④ Excellent miscibility, can be uniformly spread in the material, no frosting, no leakage; ⑤ The photochemical stability of the absorptive itself is great, does not disintegrate, does not change color; ⑥ colorless, safe, odorless; ⑦ immersion resistance; UV absorbers are made use of in plastics, paints, dyes, automobile windshields, cosmetics, drugs, sun blocks, as well as also added.

2,4-Dihydroxybenzophenone Property

Melting point 144.5-147 °C(lit.)
Boiling point 194 °C (1 mmHg)
density 1,32 g/cm3
vapor pressure 0Pa at 25℃
refractive index 1.5090 (estimate)
Fp 125 °C
storage temp. Store below +30°C.
solubility Chloroform (Slightly, Heated), Ethanol (Slightly, Heated)
form Crystalline Powder
color Yellow
PH5 (10g/l, H2O, 20℃)(slurry)
Water Solubility insoluble


2,4-Dihydroxybenzophenone Uses

  1. 2,4-Dihydroxybenzophenone is mostly utilized in plastics as a light stabilizer, which can effectively secure plexiglass and also textiles, prevent products from deteriorating as a result of light, as well as is also used as an intermediate in the synthesis of other ultraviolet absorbers.
  2. 2,4-Dihydroxybenzophenone appropriates for polyolefin, polyvinyl chloride as well as polystyrene, and so on 2,4-Dihydroxybenzophenone is used as an ultraviolet absorber, 2-hydroxy-4-methoxybenzophenone (UV-9) originated from this thing, 2-hydroxy-4-n-octyloxybenzophenone (UV-531) and also various other benzophenones, in addition to different other mono-, di-, tri-, and additionally tetra-hydroxy compounds are one of the most commonly made use of taking in light stabilizers. It can absorb ultraviolet light at 290-400 nanometers, and also has good compatibility with the majority of artificial materials, as well as likewise is thoroughly used in polymer products. 2,4-Dihydroxybenzophenone appropriates for polyvinyl chloride, polystyrene, epoxy material, cellulose resin, unsaturated polyester, paint and also synthetic rubber, and more. The optimum absorption wavelength variety is 280-340 nanometers, as well as the basic dosage is 0.1-1%. However the light stablizing impact of this item is not exceptional. The oral LD50 of this item is 8600 mg/kg for rats and 2336 mg/kg for mice.

2,4-Dihydroxybenzophenone Classification

UV absorber UV-P
Active ingredient: The response product of o-nitroaniline and p-cresol
Residence and also utilizes: Appearance is colorless or light yellow crystal. Soluble in different organic solvents such as gasoline, benzene, acetone, etc. The solubility in water is really tiny, and also it will not be disintegrated by concentrated antacids and concentrated acid. It can develop salts with heavy metal ions. It can soak up ultraviolet rays with a wavelength of 270-280nm. The melting point is 130-131 ° C. UV absorber UV-P is generally utilized in polyester, chlorinated polyester, acetate fiber, polyvinyl chloride, polystyrene, plexiglass, polyacrylonitrile and also various other materials. The security in clear items is much better than in tinted items. The dosage in the finished item is 0.% ~ 0.5%.

UV absorber UV-9
Active ingredients: 2,4-Dihydroxybenzophenone
Residence and makes use of: This product is light yellow or white crystalline powder. Density 1.324 g/cm3. The melting point is 62-66 ° C. Boiling point 150 ~ 160 ° C( 0.67 kPa), 220 ° C( 2.4 kPa). Soluble in most organic solvents such as acetone, ketone, benzene, methanol, ethyl acetate, methyl ethyl ketone and ethanol, insoluble in water. The solubility of this item in some solvents (g/100g solvent, 25 ° C )is 56.2 for benzene, 4.3 for n-hexane, 5.8 for ethanol (95%), 34.5 for carbon tetrachloride, 51.2 for styrene, and 18.7 for DOP.
Ultraviolet absorber UV-9 appropriates for different plastics such as polyvinyl chloride, polyvinylidene chloride, polymethyl methacrylate, unsaturated polyester, abdominal muscle material and also cellulose material, and the maximum absorption wavelength variety is 28 ~ 340nm. The general dosage is 0.1% to 1.5%. It has excellent thermal security as well as does not break down at 200 ° C. This item barely takes in noticeable light, so it appropriates for light clear products. This item can also be used in paint and synthetic rubber.
Safety and security preventative measures: Japan and Italy stipulate that when this product is made use of in items that come into contact with food, the optimum dose ought to not go beyond 0.3%.

UV absorber UVP-327
Component: 2-( 2′- Hydroxy-3′,5′- di-tert-phenyl) -5- chlorobenzotriazole.
Performance and application: The characteristics and also application of ultraviolet absorber UVP-327 resemble those of UV-326. It can highly soak up ultraviolet rays with a wavelength of 270-380nm, and also has great chemical stability as well as very little volatility. Good compatibility with polyolefins. Especially ideal for polyethylene as well as polypropylene. On top of that, it can additionally be made use of in polyvinyl chloride, polymethyl methacrylate, polyoxymethylene, polyurethane, unsaturated polyester, abdominal resin, epoxy resin and also cellulose material, and so on. This item has exceptional warmth sublimation resistance, cleaning resistance, gas fading resistance and also mechanical property retention. It has a significant collaborating effect when made use of in combination with antioxidants. To boost the thermo-oxidative security of the product. The basic dose of this product in plastics is 1% to 3%.
Safety preventative measures: This product has reduced poisoning. Japan, the USA, France, and Italy have actually authorized this item to be utilized in polyolefin plastics that enter contact with food, with a maximum dose of 0.5%. For various other plastics that enter contact with food, the optimum dosage specified in Italy is 0.2%, and 0.5% in Japan as well as France.

Preparation of 2,4-Dihydroxybenzophenone

1) Prep Work of 2,4-Dihydroxybenzophenone
99 g (0.60 mol) of 3-diethylaminophenol, 93.2 g (0.63 mol) of phthalic anhydride and 460 ml of toluene were introduced right into a 500 ml four-necked flask gotten ready with a Teflon stirrer, a thermostat in addition to a reflux condenser under a nitrogen environment, and also warmed to reflux temperature degree. After 2 hrs of feedback, a total amount of 300 g of toluene were distilled off within half an hour, and also the mix was after that combined at reflux for 3 hours. The mix was cooled down to space temperature level and also filtered off with suction. The filter cake was washed sequentially with 90 ml toluene along with 2 x 90 ml hexanol. The hexanol-wet acid can be made use of directly in the second step. Yield: 169 g (90%) of pink 2-( diethylamino-2-hydroxybenzoyl) benzoic acid.
2) Preparation of 2,4-Dihydroxybenzophenone (ultraviolet absorber UVA).
Introduce 313 g (1.0 mol) of 2,4-Dihydroxybenzophenone (100% basis) moistened with hexanol as well as additionally 750 ml of n-hexanol right into a 1 litre superficial flanged flask furnished with assistance stirrer, nitrogen line, thermocouple as well as likewise water trap, mixed with 53 g (519 mmol) of 96% toughness sulfuric acid along with heated to an interior temperature degree of 105-110 ° C. After home heating, the water developed by the reaction is distilled off azeotropically at an internal temperature level of 105-110 ° C. and also a stress of around 200 mbar over a duration of 6-8 hours. After cooling off to about 70 ° C., the mix is admixed with 830 ml of water and neutralized at a temperature level of 52-58 ° C. with a 25% stamina NaOH remedy. The liquid stage was split along with the natural stage was removed with 500 ml of water (temperature level: 52-58 ° C.). The aqueous stage was divided, the natural phase was cooled off to 20 ° C as well as waited for condensation of the ester. After holding for 1 hr to establish the seed product created resting, the blend was cooled down at 5 K/h to 0-5 ° C., post-stirred at this temperature for 2 humans resources and also filtered off with suction. The filter cake was cleaned with 2 x 85 ml freezing ethanol. The hexanol wet pink unrefined product UVA (407 g) was sucked totally and cleaned by adsorption on switched on carbon.

About Products:
If you need 2,4-Dihydroxybenzophenone 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 manufacturer and supplier of 2,4-Dihydroxybenzophenone, ZSpharmac will provide 2,4-Dihydroxybenzophenone 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:

Help China Chemicals to benefit the happiness of human life
Become the most trusted chemical supplier in the world
Striver – oriented, enrich employees, customer first, deep service, seek development
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.


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.


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.



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.


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 2,4-Dihydroxybenzophenone Quotation