High quality Dirithromycin with best price 62013-04-1



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High quality Dirithromycin with best price 62013-04-1
High quality Dirithromycin with best price 62013-04-1
High quality Dirithromycin with best price 62013-04-1
High quality Dirithromycin with best price 62013-04-1
High quality Dirithromycin with best price 62013-04-1
High quality Dirithromycin with best price 62013-04-1
High quality Dirithromycin with best price 62013-04-1

High quality Dirithromycin with best price 62013-04-1

  • Item No.TOP
    MOQ1 Kilogram
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If over 500pcs, mass production will start until pre-production sample has been approved.

Est. 7 days production

Quick Details
Product name Dirithromycin
Place of Origin CN;SHN
Usage Animal Pharmaceuticals
Model Number TOP
pka 9.0 in 66% aq dimethyl fluoride
Color white to off-white
storage temp. 2-8°C
Melting point 186-189° (dec) (Counter)
Shelf Life 2 Years
Grade Standard Medicine Grade
Type Anesthetic Agents
CAS No. 62013-04-1
Other Names Dirithromycin
EINECS No. 1308068-626-2

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Product Description

    Product Description

Product NameDirithromycin
CAS NO.62013-04-1
Molecular FormulaC42H78N2O14
Molecular Weight835.07
Density1.19 g/cm3 
Melting Point185 - 189ºC
Boiling Point871.8ºC at 760 mmHg 
Flash Point481ºC
Assay99% min 


   Certification of Analysis


A white or almost white, crystalline powder


Soluble in water


The retention time of major peak in the chromatogram of the sample corresponds to the standard



Dirithromycin 15S-epimer%


Heavy metals




Sulphated ash%



9-(S)-erythromycylamine ≤1.5


Other single impurity ≤1.0


Total impurities ≤4.0



Particle size

100% through 60 or 80 mesh sieve

Residual solvent


Ethyl ether≤5000ppm








Dirithromycin is a macrolide antibiotic pro-drug of 9S-erythromycylamine, a close analogue of erythromycin in which the 9-keto group is replaced with an amino group in the S-configuration. Although erythromycylamine overcomes the acid instability of erythromycin, it is poorly absorbed following oral administration. Dirithromycin is formed by reacting erythromycylamine with an aldehyde to form a Schiff base which undergoes cyclisation to an oxazine with the C11-alcohol. Dirithromycin provides higher tissue levels and prolonged in vivo half-life by slowly releasing erythromycylamine.

Company Information

Qingdao Sigma chemical Co., Ltd is is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.
The aim of Qingdao Sigma chemical Co., Ltd is a quality policy that"Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.


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Q1: Are you a manufacturer?
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Q4:Can you give me a discount price?
Surely,It depend on your qty
Q5:How can i get a sample?
free samples is available,but freight charges will be at your account and the charges will be return to you or deduct from your order in the future.
Q6: How to confirm the Product Quality before placing orders?
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Q7:How do you treat quality complaint?
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