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UV Absorber BP-4 CAS 4065-45-6

Molecular Formula: C14H12O6S

Formula Weight: 308.31

ZSpharmac: UV Absorber BP-4 Supplement

Product Name: UV Absorber BP-4
CAS No: 4065-45-6
Purity: 99%

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Basic Info

Product Name:UV Absorber BP-4
Other Names:2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Cosmetic Raw Materials
Appearance:White to Off-White Neat
EINECS No.:223-772-2
Storage:Inert Atmosphere,Room Temperature
Provide:UV Absorber BP-4 MSDS;
UV Absorber BP-4 COA

What is UV Absorber BP-4?

UV Absorber BP-4 is a light stabilizer that soaks up the ultraviolet part of sunshine and fluorescent lights without altering itself. Under sunlight as well as fluorescence, plastics and other polymer products will certainly go through auto-oxidative reactions as a result of the activity of ultraviolet rays, causing polymer destruction and wear and tear, causing bad appearance and also mechanical buildings.After consisting of a UV absorber, it can distinctly absorb this high-energy UV light and likewise turn it right into safe power for release or intake. UV absorber BP-4 is a broad-spectrum UV absorber with high absorption effectiveness, non-toxicity, and also no teratogenic damaging results.It is a course I sunscreen accepted by the FDA as well as is used regularly in the United States and also Europe.

UV Absorber BP-4 Property

Melting point 170 °C
Boiling point 0°C
density 1.4574 (rough estimate)
refractive index 1.5300 (estimate)
Fp 0°C
storage temp. Inert atmosphere,Room Temperature
solubility DMSO (Slightly), Methanol (Slightly)
form neat
color White to Off-White


UV Absorber BP-4 Uses

  1. As an anti-ultraviolet finishing agent, UV Absorber BP-4 has great anti-aging and softening results on cotton textiles and also polyester fibers.
  2. UV Absorber BP-4 is commonly used in sun block, cream, honey, lotion, oil and other cosmetics.
  3. UV Absorber BP-4 is generally made use of as a sun block and also sun block agent in water-soluble cosmetics, and also can likewise be utilized as a UV absorber in various other water-soluble inks as well as coverings.
  4. UV Absorber BP-4 is a broad-spectrum ultraviolet absorber, which has the advantages of high absorption efficiency, non-toxicity, no teratogenic side effects, excellent light and also thermal stability, and so on. It can soak up UV-An as well as UV-B at the same time. It is a course I sunscreen authorized by the United States FDA, as well as is widely utilized in the United States and Europe.
  5. As an anti-ultraviolet ending up agent in sun cream, lotion, honey, lotion, oil and also other sunscreen cosmetics, it has a good anti-aging and softening effect on cotton fabrics and polyester fibers. It is generally utilized as sunscreen and sunscreen agent in water-soluble cosmetics, and can additionally be made use of as ultraviolet absorber in other water-soluble inks as well as coatings.

UV Absorber BP-4 Production Method

Synthesis of xylylene ether 350kg of water was added to the reactor, and also 150kg of NaOH was added under stirring. After liquifying, the temperature was lowered to 10 ° C., 110 kg of resorcinol was included, as well as the mix was stirred and also dissolved. After that 126 kg of dimethyl sulfate was slowly included, as well as the reaction was carried out at 26 to 30 ° C. for 2 h. Add water to dilute, separate the oil layer, clean the oil layer with water till neutral. Remove the low-lying issue, as well as gather the portion at 215-220 ° C by distillation, which is iso-xylylene ether.

Synthesis of 2-hydroxy-4-methoxybenzophenone First, 300kg of chlorobenzene was added to the condensation pot, and also 350kg of catalyst AlCl and also 120kg of m-phenylene glycol were included under mixing. Warmth to about 80 ° C, and slowly add 320kg of benzoyl chloride. Reflux for 4-6 h, cool, hydrolyze, evaporate the solvent, cool, crystallize, and also completely dry to obtain 2-hydroxy-4-methoxybenzophenone.

To manufacture UV Absorber BP-4, first of all add 93% sulfuric acid to the sulfonation kettle, gradually add 2-hydroxy-4-methoxybenzophenone under mixing, respond at concerning 110 ℃ for 4-6h, great, Crystallization, drying out, as well as recrystallization are ended up items.

Synthesis of UV Absorber BP-4

The synthesis unfolds in three steps:
The first step of acylation reaction to synthesize 2,4-dihydroxybenzophenone;
The second step is to methylate 2-hydroxy-4-methoxybenzophenone;
The third step is sulfonation to generate 2-hydroxy-4-methoxybenzophenone.

In the synthesis reaction of the first step, the optimal reaction conditions of BP-1 were selected: the optimal reaction temperature was 50°C; the ratio of resorcinol and trichlorotoluene was 1:1.20; the optimal reaction temperature of trichlorotoluene and aluminum trichloride was 1:1.20. The best molar ratio is 1:1.3; catalytic synthesis method; crude product BP-1 is obtained by extraction and separation with xylene;
The optimal conditions for the acylation reaction in the synthesis reaction of the second step: n(2,4-dihydroxybenzophenone): v(acetone)=1:200; n(K2C03):n(bp-1)= 0.6; n(dimethyl sulfate)/n(2,4-dihydroxybenzophenone)=1 and without adding any catalyst, the acetone is collected by distillation to obtain the crude product containing impurities bp-1 and dimethyl sulfate;
The optimum condition of the sulfonation reaction in the 3rd step synthesis reaction: the mass ratio of the acylated product and the concentrated sulfuric acid is 1:10; the sulfonation temperature is 70°C; the reaction time is 2h and the solvent in the two-step centrifugal separation For methanol, drying and packaging of the product should be strictly performed in a clean room.

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: Additive , Chemical Auxiliary & Catalyst , Organic Chemicals
  • Products/Service: Organic Intermediate,Inorganic Chemistry, APIs, Dyestuffs And Pigments, Fragrance And Spices, Food 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.

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