1-1000 Kilograms
$1,000.00
≥1001 Kilograms
$800.00
Product Description
| Product Name | Dirithromycin |
| Appearance | crystals |
| CAS NO. | 62013-04-1 |
| Molecular Formula | C42H78N2O14 |
| Molecular Weight | 835.07 |
| Density | 1.19 g/cm3 |
| Melting Point | 185 - 189ºC |
| Boiling Point | 871.8ºC at 760 mmHg |
| Flash Point | 481ºC |
| Assay | 99% min |
Certification of Analysis
Characteristics | A white or almost white, crystalline powder |
| Soluble in water |
Identification | The retention time of major peak in the chromatogram of the sample corresponds to the standard |
| IR |
Dirithromycin 15S-epimer% | ≤1.5 |
Heavy metals | ≤20ppm |
Water% | ≤1.0 |
Sulphated ash% | ≤0.1 |
Impurities% | 9-(S)-erythromycylamine ≤1.5 |
| Other single impurity ≤1.0 |
| Total impurities ≤4.0 |
Assay% | 96.0~102.0 |
Particle size | 100% through 60 or 80 mesh sieve |
Residual solvent | Acetonitrile≤0.1% |
Ethyl ether≤5000ppm | |
Dichloromethane≤600ppm | |
Methanol≤3000ppm | |
2-propanol≤5000ppm |
Function&Application
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.
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.
Answer: Yes, we are factory founded on 2002.
Q2: How to contact with us?
Click the Alibaba "Contact Supplier" And then send us message the product you interest in, you will get reply within 24 hours.
Q3:Which kind of payment terms do you accept?
For small order,you can pay by T/T,Western Union or Paypal,nomal order by T/T to our company account
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?
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.
Q7:How do you treat quality complaint?
A:First of all, our quality control will reduce the quality problem to near zero. If there is a real quality problem caused by us, we will send you free goods for replacement or refund your loss.
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