Zhishang Chemical

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

Zhishang Chemical

Dibutyl Maleate CAS 105-76-0

Molecular Formula: C12H20O4

Formula Weight: 228.28

ZSpharmac: Dibutyl Maleate Supplement

Product Name: Dibutyl Maleate
CAS No: 105-76-0
Purity: 99%

Basic Info

Product Name:Dibutyl Maleate
Other Names:Dibutyl Maleate, 96%
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Organic Chemical Raw Materials
Appearance:Clear Colorless to Light Yellow Liquid
EINECS No.:203-328-4
Storage:Sealed in Dry,Room Temperature
Provide:Dibutyl Maleate MSDS;
Dibutyl Maleate COA

What is Dibutyl Maleate?

Dibutyl maleate (DBM), also known as dibutyl maleate, is a widely used polymer monomer and an important chemical raw material. Lubricants and plasticizers. The industrial use of sulfuric acid to catalyze the synthesis of dibutyl maleate has problems such as complex process, serious equipment corrosion, and serious “three wastes” pollution. Therefore, researchers continue to explore new catalysts to replace sulfuric acid, such as sulfonic acid, inorganic salts, and solid superacids. , Heteropolyacid, Molecular Sieve.

Dibutyl Maleate Properties:

Melting point -85°C
Boiling point 281 °C(lit.)
density 0.988 g/mL at 25 °C(lit.)
vapor pressure 0.0027 hPa (20 °C)
refractive index n20/D 1.445(lit.)
Fp >230 °F
storage temp. Sealed in dry,Room Temperature
solubility 0.17g/l slightly soluble
form Liquid
color Clear colorless to light yellow
explosive limit0.5-3.4%(V)
Water Solubility insoluble


Dibutyl Maleate Uses

  1. Dibutyl maleate (DBM) is used as a raw material for synthetic resins and coatings, and as an impregnant, dispersant, lubricant, etc. in the petroleum industry, fabrics, plastics, and paper industries. Plasticizer based on acrylic resins.
  2. Dibutyl maleate (DBM) is also used as an intermediate in the production of high-efficiency insecticides such as marathon and pharmaceuticals, as well as in the production of polymer compounds.
  3. Dibutyl maleate (DBM) can be copolymerized with vinyl chloride, vinyl acetate and other monomers, used as coatings, adhesives, impregnants, dispersants, lubricants, etc. for papermaking, fabrics, etc.; diisooctyl maleate Esters and dinonyl maleate are good petroleum pour point depressants.

Preparation of Dibutyl Maleate

Method 1: In a 100 mL three-necked flask equipped with a water separator, add a certain amount of maleic anhydride, n-butanol and a catalyst, and place it in a microwave reactor. Set a certain power and a certain microwave time of the microwave reactor to carry out the microwave radiation reflux reaction. After the reaction is completed, wash with distilled water and saturated sodium carbonate solution for several times respectively, dry with anhydrous magnesium sulfate, and after the treatment, the unreacted n-butanol is distilled off by vacuum distillation, and finally the ester fraction is collected to obtain colorless and transparent oily liquid dibutyl maleate. Weigh and calculate the yield according to the following formula. The experimental results show that the optimal synthesis conditions for dibutyl maleate are as follows: the ratio of maleic anhydride to n-butanol is 1:4, and the ionic liquid [HSO3-pmim]+[HSO4]- is used as the catalyst, and the dosage is 2.0g, the microwave power is 600W, the microwave time is 15min, and the yield of dibutyl maleate can reach 99.36%. Under microwave irradiation, the activity of the catalyst ionic liquid [HSO3-pmim] + [HSO4]- did not decrease significantly after repeated use for 7 times, and the yield of dibutyl maleate was still higher than 96%, indicating that the catalyst has a good reaction activity and stability.
Method 2: Add a certain amount of maleic anhydride, n-butanol, catalyst and toluene with water to a three-necked flask equipped with a magnetic stirring bar, a thermometer, a water separator and a condenser, and heat and reflux for a certain period of time. After the reaction was completed, samples were taken to measure the acid value after cooling a little. The change of acid value before and after the reaction was measured by the method of GB1668-81, and the esterification rate was calculated. The experimental results show that Zr(SO4)2/SiO2 is a good catalyst for the synthesis of dibutyl maleate. The suitable catalyst preparation conditions are: zirconium sulfate loading 57%, calcination temperature 400℃, calcination time 2h. The appropriate catalytic synthesis response conditions are as adheres to: the ratio of anhydride to alcohol is 1:2.5, the amount of catalyst is 6% of the mass of maleic anhydride, 8 mL of toluene with water is used, and the reaction time is 2.0 h. Under these conditions, the esterification rate of dibutyl maleate was 98.5%.

Method 3: a synthetic method of dibutyl maleate, the synthetic method adopted is: adding a reaction system composed of maleic anhydride, n-butanol and a catalyst, and using a circulating pump and a heat exchanger for internal circulation heating, The system is evacuated to carry out the reaction; wherein the reaction temperature is 80-130° C., and the reaction time is 3-4 hours. The process flow schematic diagram as shown in Figure 1 is operated, in the reactor, add 98kg maleic anhydride, 111kg n-butanol, 25kg hydrogen type cation exchange resin, heat up, open the condenser, after the solution is clear, open the heat exchange steam, open the bottom valve of the reaction tank, the transfer pump, open the internal circulation, open the condenser and vacuumize, separate the produced water, control the reaction temperature in the tank at 90~125 ° C, react for 4 hours, distill, neutralize, After washing with water, the product was obtained, and the product was detected, and the esterification rate was 99.3%.

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.

Get Dibutyl Maleate Quotation