Nanjing Hongzun Chemical Plant Co., Ltd
Home>> Products>> Copper Pyrithione
Copper Pyrithione
Nanjing Hongzun Chemical Plant Co., Ltd.

Item Index
Appearance Olive green powder
Assay ≥98%
Melting Point ≥250℃
Particle D50:
Packing & Storage
Packing in 20kg/fiber drum
Storage 20℃, 2 years.
Shipping Room temperature in China; may vary elsewhere
Free Quote
For samples, pricing, or more information, please call us at 0086-25-52397805 or mail to or fill out the following form. We will respond to you as soon as possible.
General information
Chemical & Physical Properties
Safety Information
Synthetic Route
Common Names Copper Pyrithione | CPT | Bis(1-hydroxy-2(IH)-pyridineselonato-O,S)copper
CAS No. 14915-37-8 Boiling Point (℃) 253.8ºC
Molecular Weight 315.859 Melting Point (℃) N/A
Appearance white powder Vapor Specific Gravity 1.782 g/cm3
HS Code 2933990 Flash Point (℃) 107.3ºC
Solubility Insoluble in water Autoignition Temperature (℃)
Safety Phrases
RIDADR UN 2811 6.1/PG 2
WGK Germany
Packaging Group II
Hazard Class 6.1(b)
Inhalation Cough. Sore throat. Use local exhaust or breathing protection. Fresh air, rest.
Skin Redness. Burning sensation. Itching. Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes Redness. Pain. Wear safety goggles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion Abdominal pain. Nausea. Vomiting. Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.

(1), 2-chloropyridine oxidation: add 2-chloropyridine and catalyst to the container, drop hydrogen peroxide;

(2) Filter the solution obtained in step (1), drain the filter cake, wash the filter cake, and drain the filter cake again. At this time, the filter cake is the catalyst used in step (1), and the filtrate is 2-chloropyridine nitrogen oxide solution;

(3) Preparation of pyridine thione copper

Frequently Asked Questions

Application area
Copper pyrithione (CPT) is a broad-spectrum, low toxicity, and environmentally friendly antibacterial and antifungal agent for fungi and bacteria, widely used in civil coatings, adhesives, and carpets; It can also be used as a ship anti-fouling paint to prevent crustaceans, seaweed, and aquatic organisms from adhering to the ship's shell panels. Due to the low toxicity and stability of CPT, it can be added to the coating to make the coating show gel stability and extend the storage time of the coating. Copper pyrithione is obtained by the reaction of slightly soluble alkaline copper salt and pyrithione alkali metal salt, and the resulting product has a small crystal size with an average particle size of no more than 5 μ m。 In addition, as the residual alkaline copper salt of impurities in pyrithione copper products, it is the reason for gel of the coating during storage when it is mixed with the antifouling coating on the bottom of the ship.

CPT and its similar products have great potential and broad potential for application in the field of pesticides due to their low toxicity and excellent broad-spectrum performance.