Diethyl maleate CAS 141-05-9

Diethylaminosulfur trifluoride CAS 38078-09-0
1-Chloromethyl naphthalene CAS 86-52-2

Diethyl maleate paramete

CAS No.: 141-05-9
MF: C8H12O4
Place of Origin: Shandong, China
Purity: 99.5%min
Model Number: 141-05-9
Appearance: Colorless Transparent Liquid
EINECS No.: 205-451-9
Type: Syntheses Material Intermediates
Brand Name: Lookchemical
Application: Fine Chemical Intermediate
CAS: 141-05-9


Diethyl maleate, also known as diethyl maleate, is used in pesticides for the preparation of organophosphorus insecticide malathion, and is also an intermediate in pharmaceuticals, spices, and water quality stabilizers (organic polycarboxylic phosphonic acid compounds).

Diethyl maleic acid is a polymer monomer, pesticide, medicine, flavor, water stabilizer (organic polycarboxylic phosphonic acid compounds) intermediate. Mainly used in the production of organophosphorus pesticide malathion (Marathon)

In pesticides for the preparation of organophosphorus insecticide malathion, in addition to medicine, spices, water stabilizer (organic polycarboxylic phosphonic acid compounds) intermediate; It can also be used in the production of spices

Check ammonia and potassium. Gas chromatographic stationary solution (maximum service temperature 40℃, solvents are benzene, chloroform, ethanol). Solvents for resins and nitrocellulose, plasticizers, organic synthesis, insecticides, polymer monomers, plastic additives.

Used as pesticide intermediate, used in the preparation of organophosphorus pesticide malathion, can also be used in the production of spices


Item Specifications
Appearance Colorless transparent liquid
Content of esters ≥99%
Acidity degree ≤0.2%



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

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

* Sample testing support.

*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

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

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*Product has any problem can return.


Secure and discreet shipment. You have various choices of transportation methods.

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.


Q1: Do you accept sample order?
A:  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.
Q2:  What information should I let you know if I want to get a quotation
A :  Quality you require, eg. Assay, Purity, or single impurity -Quantity you need -Standard you want, such as USP, EP, JP etc.
Q3: What’s your MOQ?
A :  Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.
Q4: Do you supply product report?
A : Yes. We'll give you product analysis report before shipping.
Q5: When will you deliver the goods
A :  For sample(less than 1kg), in about 3 working days after payment; for larger orders (more than 1kg), in about 7 working days after payment.
Q6: How to confirm the Product Quality before placing orders?
A :  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.

Diethyl maleate picture

Packaging and shipping